50278 + Interview Questions in Physics Page 255 InterviewSolution

12701.	A bead constrained to move in a tube of diameter 10 cm is initially placed at the bottommost point of the tube. What minimum speed should be given to the bead so that it just reaches the topmost point in the tube? Take g=10 m/s2
Answer» A bead constrained to move in a tube of diameter $10 cm$ is initially placed at the bottommost point of the tube. What minimum speed should be given to the bead so that it just reaches the topmost point in the tube? Take $g = 10 {m/s}^{2}$

Discussion

12702.	About 180 MeV of usable energy is released in the neutron induced fissioning of a 92U235 nucleus. If the reactor using 92U235 as fuel continuously generates 100 MW power. The time it will take for 1 kg of the uranium to be consumed in days .(integer only)
Answer» About $180 MeV$ of usable energy is released in the neutron induced fissioning of a $_{92} U^{235}$ nucleus. If the reactor using $_{92} U^{235}$ as fuel continuously generates $100 MW$ power. The time it will take for $1 kg$ of the uranium to be consumed in days .(integer only)

Discussion

12703.	A particle of mass m is attached to three identical springs A,B and C each of force constant k as shown in figure. If the particle of mass m in is pushed slightly against the spring A and released, then the time period of oscillation is
Answer» A particle of mass $m$ is attached to three identical springs $A, B$ and $C$ each of force constant $k$ as shown in figure. If the particle of mass $m$ in is pushed slightly against the spring $A$ and released, then the time period of oscillation is

Discussion

12704.	A current of 2 A flows in a system of conductors as shown. The potential difference (VA−VB) will be
Answer» A current of 2 A flows in a system of conductors as shown. The potential difference $(V_{A} - V_{B})$ will be

Discussion

12705.	what is net force and how to calculate it?
Answer» what is net force and how to calculate it?

Discussion

12706.	If the length of a simple pendulum at a given place is increased by 6 times, the ratio of the final to the initial time periods of the pendulum is:
Answer» If the length of a simple pendulum at a given place is increased by 6 times, the ratio of the final to the initial time periods of the pendulum is:

Discussion

12707.	) The upper end of wire of diameter 12 mm and lengthtm is ciamped and its other ond is twisted throughan angle of 30 Tha angle of shear is(1) 18(3) 0.18^° (2) 36(4) 0.36
Answer» ) The upper end of wire of diameter 12 mm and lengthtm is ciamped and its other ond is twisted throughan angle of 30 Tha angle of shear is(1) 18(3) 0.18^° (2) 36(4) 0.36

Discussion

12708.	A body of density d1 is counterpoised by Mg of weights of density d2 in air of density d. Then the true mass of the body is
Answer» A body of density $d_{1}$ is counterpoised by Mg of weights of density $d_{2}$ in air of density d. Then the true mass of the body is

Discussion

12709.	three identical small balls each of mass m and charge q on each are suspended at the same point through 3 identical insulating strings each length l .In equilibrium the angle made by the string with the vertical
Answer» three identical small balls each of mass m and charge q on each are suspended at the same point through 3 identical insulating strings each length l .In equilibrium the angle made by the string with the vertical

Discussion

12710.	The temperature inside and outside a refrigerator are 273K and 300K respectively .Assuming that the refrigerator cycle is reversible for every joule of workdone the heat delivered to the surrounding is.
Answer» The temperature inside and outside a refrigerator are 273K and 300K respectively .Assuming that the refrigerator cycle is reversible for every joule of workdone the heat delivered to the surrounding is.

Discussion

12711.	what is the relation between electric field intensity and electric potential?
Answer» what is the relation between electric field intensity and electric potential?

Discussion

12712.	15.A car is moving towards north with a velocity of 80km/hr.Another car is moving with 80\sqrt{}2km/hr velocity towards north west .Find the relative velocity of the second car with respect to the first car
Answer» 15.A car is moving towards north with a velocity of 80km/hr.Another car is moving with 80\sqrt{}2km/hr velocity towards north west .Find the relative velocity of the second car with respect to the first car

Discussion

12713.	51. The potential energy of mass m moving in xy plane in aconservative field is given by U=ax+by, where x and y are position coordinates of the object. Find magnitude of its acceleration
Answer» 51. The potential energy of mass m moving in xy plane in aconservative field is given by U=ax+by, where x and y are position coordinates of the object. Find magnitude of its acceleration

Discussion

12714.	Q.26 The de broglie wavelength of an electron moving with kinetic energy of 144 ev is nearly
Answer» Q.26 The de broglie wavelength of an electron moving with kinetic energy of 144 ev is nearly

Discussion

12715.	The torque acting on a dipole of moment →p in an electric field →E is .
Answer» The torque acting on a dipole of moment $\to p$ in an electric field $\to E$ is .

Discussion

12716.	A person of mass 40 kg is inside a lift of mass 960 kg and presses the button on the control panel. The lift starts moving upwards with an acceleration 2 m/s2. If g=10 m/s2, the tension in the supporting cable is
Answer» A person of mass $40 kg$ is inside a lift of mass $960 kg$ and presses the button on the control panel. The lift starts moving upwards with an acceleration $2 {m/s}^{2}$ . If $g = 10 {m/s}^{2}$ , the tension in the supporting cable is

Discussion

12717.	A 220 V AC. supply is connected between points A and B. What will be the potential difference V across the capacitor? Options: 220 V 110 V 0 VV
Answer» A 220 V AC. supply is connected between points A and B. What will be the potential difference V across the capacitor? Options: 220 V 110 V 0 V V

Discussion

12718.	a capacitor has a capacitance of 50 pF, which increases to 175 pF with a dielectric material between its plates.what is the dielectric constant of the material
Answer» a capacitor has a capacitance of 50 pF, which increases to 175 pF with a dielectric material between its plates.what is the dielectric constant of the material

Discussion

12719.	(a) Draw a ray diagram to show the image formation by a combination of two thin convex lenses in contact. Obtain the expression for the power of this combination in terms of the focal lengths of the lenses. (b) A ray of light passing from air through an equilateral glass prism undergoes minimum deviation when the angle of incidence is 34 of the angle of prism. Calculate the speed of light in the prism.
Answer» (a) Draw a ray diagram to show the image formation by a combination of two thin convex lenses in contact. Obtain the expression for the power of this combination in terms of the focal lengths of the lenses. (b) A ray of light passing from air through an equilateral glass prism undergoes minimum deviation when the angle of incidence is $\frac{3}{4}$ of the angle of prism. Calculate the speed of light in the prism.

Discussion

12720.	A 5 μF capacitor is charged fully by a 220 V supply. It is then disconnected from the supply and is connected across another uncharged 2.5 μF capacitor. If the energy change during the charge redistribution is X100 J then the value of X to the nearest integer is
Answer» A $5 μ F$ capacitor is charged fully by a $220 V$ supply. It is then disconnected from the supply and is connected across another uncharged $2.5 μ F$ capacitor. If the energy change during the charge redistribution is $\frac{X}{100} J$ then the value of $X$ to the nearest integer is

Discussion

12721.	A body is thrown vertically up with a velocity u.if it passes 3 points A,B,C in its upward journey with the velocity U/2, U/3, U/4 respectively. The ratio of separation AB and BC is?
Answer» A body is thrown vertically up with a velocity u.if it passes 3 points A,B,C in its upward journey with the velocity U/2, U/3, U/4 respectively. The ratio of separation AB and BC is?

Discussion

12722.	State Gauss theoram. Derive an experience for the electric field due to charge plane sheet
Answer» State Gauss theoram. Derive an experience for the electric field due to charge plane sheet

Discussion

12723.	A bus decreases it's speedits speed from 80km h^-1 to 60km h^-1 in 5s. Find the acceleration of the bus.
Answer» A bus decreases it's speedits speed from 80km h^-1 to 60km h^-1 in 5s. Find the acceleration of the bus.

Discussion

12724.	A 15 kg mass, fastened to the end of a steel wire of unstretched length 1.0 m, is whirled in a vertical circle with an angular velocity of 4T radian/s at the bottom of the circle. The cross-sectional area of the wire is 0.065 cm². The elongation of the wire when the mass is at the lowest point is (g = 10 m/s²)
Answer» A 15 kg mass, fastened to the end of a steel wire of unstretched length 1.0 m, is whirled in a vertical circle with an angular velocity of 4T radian/s at the bottom of the circle. The cross-sectional area of the wire is 0.065 cm². The elongation of the wire when the mass is at the lowest point is (g = 10 m/s²)

Discussion

12725.	The work done by a gas molecule in an isolated system is given by,W=αβ2e−x2/αkT Where x is the displacement, k is the Boltzmann constant, T is the temperature, α and β are constants, then the dimension of β will be :
Answer» The work done by a gas molecule in an isolated system is given by, $W = α β^{2} e^{- x^{2} / α k T}$ Where $x$ is the displacement, $k$ is the Boltzmann constant, $T$ is the temperature, $α$ and $β$ are constants, then the dimension of $β$ will be :

Discussion

12726.	96.The flux of magnetic field through a closed conducting loop of resistance 0.4 changes with time according to the equation = 0.20t2 + 0.40t + 0.60 where t is time in seconds. Find (i) the induced emf at t = 2s. (ii) the average induced emf in t = 0 to t = 5 s. (iii) charge passed through the loop in t = 0 to t = 5s (iv) average current in time interval t = 0 to t = 5 s (v) heat produced in t = 0 to t = 5s.
Answer» 96.The flux of magnetic field through a closed conducting loop of resistance 0.4 changes with time according to the equation = 0.20t2 + 0.40t + 0.60 where t is time in seconds. Find (i) the induced emf at t = 2s. (ii) the average induced emf in t = 0 to t = 5 s. (iii) charge passed through the loop in t = 0 to t = 5s (iv) average current in time interval t = 0 to t = 5 s (v) heat produced in t = 0 to t = 5s.

Discussion

12727.	A power transmission line feeds input power at 2300 V to a step down transformer with its primary windings having 4000 turns. The output power is delivered at 230 V by the transformer. If the current in the primary of the transformer is 5 A and its efficiency is 90%, the output current would be
Answer» A power transmission line feeds input power at $2300 V$ to a step down transformer with its primary windings having $4000 turns$ . The output power is delivered at $230 V$ by the transformer. If the current in the primary of the transformer is $5 A$ and its efficiency is $90 %$ , the output current would be

Discussion

12728.	A particle is thrown with kinetic energy 100 J straight up on a rough inclined plane of inclination 45^° and coefficient of friction is 0.2. The work done against friction before the particle comes to rest is 1) 16.6 J 2) 100 J 3) 13 J 4) 33.3 J
Answer» A particle is thrown with kinetic energy 100 J straight up on a rough inclined plane of inclination 45^° and coefficient of friction is 0.2. The work done against friction before the particle comes to rest is 1) 16.6 J 2) 100 J 3) 13 J 4) 33.3 J

Discussion

12729.	A 4 kg ball tied to the end of a cord of length 1 m is swinging in a vertical circle. The maximum speed at which it can swing, if the cord can sustain a maximum tension of 163.6 N will be: [Take g=9.8 m/s2]
Answer» A $4 kg$ ball tied to the end of a cord of length $1 m$ is swinging in a vertical circle. The maximum speed at which it can swing, if the cord can sustain a maximum tension of $163.6 N$ will be: [Take $g = 9.8 {m/s}^{2}$ ]

Discussion

12730.	An electron is revolving around a proton, producing a magnetic field of 16 Wb m−2 in a circular orbit of radius 1 ˚A. It's angular velocity will be
Answer» An electron is revolving around a proton, producing a magnetic field of $16 {Wb m}^{- 2}$ in a circular orbit of radius $1 ˚ A .$ It's angular velocity will be

Discussion

12731.	Two conducting rods are joined together and are moving in a magnetic field of magnitude 0.5 T as shown in the figure. The potential difference between the ends A and B is (in volt) :(Give the answer in integer only)
Answer» Two conducting rods are joined together and are moving in a magnetic field of magnitude $0.5 T$ as shown in the figure. The potential difference between the ends $A$ and $B$ is $(in volt)$ : (Give the answer in integer only)

Discussion

12732.	ntQ.A body is thrown vertically upward with velocity u. the distance travelled by it in the 7th & 8th second are equal. the displacement in 8th second is equal to (take g=10m/sn ntn
Answer» ntQ.A body is thrown vertically upward with velocity u. the distance travelled by it in the 7th & 8th second are equal. the displacement in 8th second is equal to (take g=10m/sn ntn

Discussion

12733.	A bar magnet of moment of inertia 49×10−2 kg m2 oscillates in a uniform magnetic field of induction 0.5×10−4 T. The time period of oscillation is 8.8 s. Find the magnetic moment of the bar magnet is (nearly)
Answer» A bar magnet of moment of inertia $49 \times 10^{- 2} {kg m}^{2}$ oscillates in a uniform magnetic field of induction $0.5 \times 10^{- 4} T .$ The time period of oscillation is $8.8 s .$ Find the magnetic moment of the bar magnet is (nearly)

Discussion

12734.	A man is travelling on a flatcar which is moving up a plane that is inclined at angle θ to the horizontal with a speed of 5 m/s (cosθ=45). He throws a ball towards a stationary hoop located above the incline in such a way that the ball moves parallel to the slope of the incline while going through the centre of the hoop. The centre of the hoop is 4 m high from the man's hand, perpendicular to the incline. The time taken (in seconds) by the ball to reach the hoop is [Take g=10 m/s2]
Answer» A man is travelling on a flatcar which is moving up a plane that is inclined at angle $θ$ to the horizontal with a speed of $5 m/s$ $(cos θ = \frac{4}{5})$ . He throws a ball towards a stationary hoop located above the incline in such a way that the ball moves parallel to the slope of the incline while going through the centre of the hoop. The centre of the hoop is $4 m$ high from the man's hand, perpendicular to the incline. The time taken (in seconds) by the ball to reach the hoop is [Take $g = 10 {m/s}^{2}$ ]

Discussion

12735.	Define Henry's law?
Answer» Define Henry's law?

Discussion

12736.	Number of significant figures in '1' . Explain with reason:Options are :(a)one (b)infinite
Answer» Number of significant figures in '1' . Explain with reason: Options are : (a)one (b)infinite

Discussion

12737.	As shown in the figure, a truck has its rear side open and a box of 40 kg mass is placed 5 m away from the open end. The coefficient of friction between the box and the surface below it is 0.15. On a straight road, the truck starts from rest and accelerates with 2 m/s2. Find the distance (in metres) travelled by the truck by the time the box falls from the truck. (Ignore the size of the box). [Take g=10 m/s2]
Answer» As shown in the figure, a truck has its rear side open and a box of $40 kg$ mass is placed $5 m$ away from the open end. The coefficient of friction between the box and the surface below it is $0.15$ . On a straight road, the truck starts from rest and accelerates with $2 {m/s}^{2}$ . Find the distance (in metres) travelled by the truck by the time the box falls from the truck. (Ignore the size of the box). [Take $g = 10 {m/s}^{2}$ ]

Discussion

12738.	In the following arrangement, an object of mass 1.2 kg is at rest at point P. If N and the F are the reaction and the force of friction, then (g=10ms−1)
Answer» In the following arrangement, an object of mass 1.2 kg is at rest at point P. If N and the F are the reaction and the force of friction, then $(g = 10 m s^{- 1})$

Discussion

12739.	A police car moving at 22 m/s, chases a motorcyclist. The police man sounds his horn at 176 Hz, while both of them move towards a stationary siren of frequency 165 Hz. Calculate the speed of the motorcycle, if it is given that motor cyclist does not observe any beats. (velocity of sound in air =330m/s)
Answer» A police car moving at 22 m/s, chases a motorcyclist. The police man sounds his horn at 176 Hz, while both of them move towards a stationary siren of frequency 165 Hz. Calculate the speed of the motorcycle, if it is given that motor cyclist does not observe any beats. (velocity of sound in air =330m/s)

12739.

A police car moving at 22 m/s, chases a motorcyclist. The police man sounds his horn at 176 Hz, while both of them move towards a stationary siren of frequency 165 Hz. Calculate the speed of the motorcycle, if it is given that motor cyclist does not observe any beats. (velocity of sound in air =330m/s)

Answer»

A police car moving at 22 m/s, chases a motorcyclist. The police man sounds his horn at 176 Hz, while both of them move towards a stationary siren of frequency 165 Hz. Calculate the speed of the motorcycle, if it is given that motor cyclist does not observe any beats.

(velocity of sound in air =330m/s)

Discussion

12740.	A sphere of mass m moving with a constant velocity hits another stationary sphere of the same mass. If e is the coefficient of restitution, the ratio of speed of the first sphere to the speed of the second sphere, after the head on collision will be,
Answer» A sphere of mass $m$ moving with a constant velocity hits another stationary sphere of the same mass. If $e$ is the coefficient of restitution, the ratio of speed of the first sphere to the speed of the second sphere, after the head on collision will be,

Discussion

12741.	an ammeter show that an alternator is delivering 20 ampere. the voltmeter reads 220 volt while a wattmetre shows that 4 kilo watt of power is being delivered.find the power factor.
Answer» an ammeter show that an alternator is delivering 20 ampere. the voltmeter reads 220 volt while a wattmetre shows that 4 kilo watt of power is being delivered.find the power factor.

Discussion

12742.	A series LCR circuit with 100 Ω resistance is connected to an AC source of 200 V and angular frequency 300 rad/s. When only the capacitance is removed, the current lags behind the voltage by 60∘. When only the inductance is removed, the current leads the voltage by 60∘. The rms current in the LCR circuit is -
Answer» A series LCR circuit with $100 Ω$ resistance is connected to an AC source of $200 V$ and angular frequency $300 rad/s$ . When only the capacitance is removed, the current lags behind the voltage by $60^{\circ}$ . When only the inductance is removed, the current leads the voltage by $60^{\circ}$ . The rms current in the LCR circuit is -

Discussion

12743.	A square coil of side 10 cm consists of 20 turns and carries a currentof 12 A. The coil is suspended vertically and the normal to the planeof the coil makes an angle of 30º with the direction of a uniformhorizontal magnetic field of magnitude 0.80 T. What is the magnitude of torque experienced by the coil?
Answer» A square coil of side 10 cm consists of 20 turns and carries a currentof 12 A. The coil is suspended vertically and the normal to the planeof the coil makes an angle of 30º with the direction of a uniformhorizontal magnetic field of magnitude 0.80 T. What is the magnitude of torque experienced by the coil?

Discussion

12744.	In ydse using light of wavelength 600nm if angular fringe width is0.1degree then separation between 2slits is
Answer» In ydse using light of wavelength 600nm if angular fringe width is0.1degree then separation between 2slits is

Discussion

12745.	The electric flux through a closed Gaussian surface depends upon1)net charge enclosed 2)net charge enclosed, permittivityof the medium
Answer» The electric flux through a closed Gaussian surface depends upon 1)net charge enclosed 2)net charge enclosed, permittivityof the medium

Discussion

12746.	With respect to the given image choose the correct option.
Answer» With respect to the given image choose the correct option.

12746.

With respect to the given image choose the correct option.

Answer»

With respect to the given image choose the correct option.

Discussion

12747.	An inductor coil carries a steady state current of 2.0 A when connected across an ideal battery of emf 4.0 V. If its inductance is 1.0 H. Find the time constant of the circuit.
Answer» An inductor coil carries a steady state current of $2.0 A$ when connected across an ideal battery of emf $4.0 V$ . If its inductance is $1.0 H .$ Find the time constant of the circuit.

Discussion

12748.	Q. A range of galvanometer is V when 50Ω resis†an ce is connected in series its range ger doubled when 500Ω resis†an ce is connected in series then galvanometer resis†an ce is?
Answer» Q. A range of galvanometer is V when 50Ω resis†an ce is connected in series its range ger doubled when 500Ω resis†an ce is connected in series then galvanometer resis†an ce is?

Discussion

12749.	A direction banner was situated on a crossroad. Due to an accident, the banner turned in such a manner that the pointer which was showing West started showing North. A person went to the wrong direction thinking to be East. What is the actual direction in which he was travelling?
Answer» A direction banner was situated on a crossroad. Due to an accident, the banner turned in such a manner that the pointer which was showing West started showing North. A person went to the wrong direction thinking to be East. What is the actual direction in which he was travelling?

Discussion

12750.	is this formula correct for calculating power of a refracting spherical surface μ_{2{}_{}-}μ_{1_{}}/R=P
Answer» is this formula correct for calculating power of a refracting spherical surface μ_{2{}_{}-}μ_{1_{}}/R=P

Discussion

Explore topic-wise InterviewSolutions in .

A bead constrained to move in a tube of diameter 10 cm is initially placed at the bottommost point of the tube. What minimum speed should be given to the bead so that it just reaches the topmost point in the tube? Take g=10 m/s2

About 180 MeV of usable energy is released in the neutron induced fissioning of a 92U235 nucleus. If the reactor using 92U235 as fuel continuously generates 100 MW power. The time it will take for 1 kg of the uranium to be consumed in days .(integer only)

A particle of mass m is attached to three identical springs A,B and C each of force constant k as shown in figure. If the particle of mass m in is pushed slightly against the spring A and released, then the time period of oscillation is

A current of 2 A flows in a system of conductors as shown. The potential difference (VA−VB) will be

what is net force and how to calculate it?

If the length of a simple pendulum at a given place is increased by 6 times, the ratio of the final to the initial time periods of the pendulum is:

) The upper end of wire of diameter 12 mm and lengthtm is ciamped and its other ond is twisted throughan angle of 30 Tha angle of shear is(1) 18(3) 0.18^° (2) 36(4) 0.36

A body of density d1 is counterpoised by Mg of weights of density d2 in air of density d. Then the true mass of the body is

three identical small balls each of mass m and charge q on each are suspended at the same point through 3 identical insulating strings each length l .In equilibrium the angle made by the string with the vertical

The temperature inside and outside a refrigerator are 273K and 300K respectively .Assuming that the refrigerator cycle is reversible for every joule of workdone the heat delivered to the surrounding is.

what is the relation between electric field intensity and electric potential?

15.A car is moving towards north with a velocity of 80km/hr.Another car is moving with 80\sqrt{}2km/hr velocity towards north west .Find the relative velocity of the second car with respect to the first car

51. The potential energy of mass m moving in xy plane in aconservative field is given by U=ax+by, where x and y are position coordinates of the object. Find magnitude of its acceleration

Q.26 The de broglie wavelength of an electron moving with kinetic energy of 144 ev is nearly

The torque acting on a dipole of moment →p in an electric field →E is .

A person of mass 40 kg is inside a lift of mass 960 kg and presses the button on the control panel. The lift starts moving upwards with an acceleration 2 m/s2. If g=10 m/s2, the tension in the supporting cable is

A 220 V AC. supply is connected between points A and B. What will be the potential difference V across the capacitor? Options: 220 V 110 V 0 VV

a capacitor has a capacitance of 50 pF, which increases to 175 pF with a dielectric material between its plates.what is the dielectric constant of the material

A 5 μF capacitor is charged fully by a 220 V supply. It is then disconnected from the supply and is connected across another uncharged 2.5 μF capacitor. If the energy change during the charge redistribution is X100 J then the value of X to the nearest integer is

A body is thrown vertically up with a velocity u.if it passes 3 points A,B,C in its upward journey with the velocity U/2, U/3, U/4 respectively. The ratio of separation AB and BC is?

State Gauss theoram. Derive an experience for the electric field due to charge plane sheet

A bus decreases it's speedits speed from 80km h^-1 to 60km h^-1 in 5s. Find the acceleration of the bus.

The work done by a gas molecule in an isolated system is given by,W=αβ2e−x2/αkT Where x is the displacement, k is the Boltzmann constant, T is the temperature, α and β are constants, then the dimension of β will be :

A power transmission line feeds input power at 2300 V to a step down transformer with its primary windings having 4000 turns. The output power is delivered at 230 V by the transformer. If the current in the primary of the transformer is 5 A and its efficiency is 90%, the output current would be

A particle is thrown with kinetic energy 100 J straight up on a rough inclined plane of inclination 45^° and coefficient of friction is 0.2. The work done against friction before the particle comes to rest is 1) 16.6 J 2) 100 J 3) 13 J 4) 33.3 J

A 4 kg ball tied to the end of a cord of length 1 m is swinging in a vertical circle. The maximum speed at which it can swing, if the cord can sustain a maximum tension of 163.6 N will be: [Take g=9.8 m/s2]

An electron is revolving around a proton, producing a magnetic field of 16 Wb m−2 in a circular orbit of radius 1 ˚A. It's angular velocity will be

Two conducting rods are joined together and are moving in a magnetic field of magnitude 0.5 T as shown in the figure. The potential difference between the ends A and B is (in volt) :(Give the answer in integer only)

ntQ.A body is thrown vertically upward with velocity u. the distance travelled by it in the 7th & 8th second are equal. the displacement in 8th second is equal to (take g=10m/sn ntn

A bar magnet of moment of inertia 49×10−2 kg m2 oscillates in a uniform magnetic field of induction 0.5×10−4 T. The time period of oscillation is 8.8 s. Find the magnetic moment of the bar magnet is (nearly)

Define Henry's law?

Number of significant figures in '1' . Explain with reason:Options are :(a)one (b)infinite

In the following arrangement, an object of mass 1.2 kg is at rest at point P. If N and the F are the reaction and the force of friction, then (g=10ms−1)

A sphere of mass m moving with a constant velocity hits another stationary sphere of the same mass. If e is the coefficient of restitution, the ratio of speed of the first sphere to the speed of the second sphere, after the head on collision will be,

an ammeter show that an alternator is delivering 20 ampere. the voltmeter reads 220 volt while a wattmetre shows that 4 kilo watt of power is being delivered.find the power factor.

In ydse using light of wavelength 600nm if angular fringe width is0.1degree then separation between 2slits is

The electric flux through a closed Gaussian surface depends upon1)net charge enclosed 2)net charge enclosed, permittivityof the medium

With respect to the given image choose the correct option.

An inductor coil carries a steady state current of 2.0 A when connected across an ideal battery of emf 4.0 V. If its inductance is 1.0 H. Find the time constant of the circuit.

Q. A range of galvanometer is V when 50Ω resis†an ce is connected in series its range ger doubled when 500Ω resis†an ce is connected in series then galvanometer resis†an ce is?

A direction banner was situated on a crossroad. Due to an accident, the banner turned in such a manner that the pointer which was showing West started showing North. A person went to the wrong direction thinking to be East. What is the actual direction in which he was travelling?

is this formula correct for calculating power of a refracting spherical surface μ_{2{}_{}-}μ_{1_{}}/R=P