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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1551. |
A stone tied to the end of a string 80 cm long is whirled in a horizontal circle with a constant speed. If the stone makes 14 revolutions in 25 sec, then magnitude of acceleration of the same will be |
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Answer» A stone tied to the end of a string 80 cm long is whirled in a horizontal circle with a constant speed. If the stone makes 14 revolutions in 25 sec, then magnitude of acceleration of the same will be |
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| 1552. |
What happens when 2 capacitors are connected with:opposite polarity plates connected together and same polarity plates are connected together |
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Answer» What happens when 2 capacitors are connected with:opposite polarity plates connected together and same polarity plates are connected together |
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| 1553. |
Find the equation of the line passing through the points (2, 3) and the point of intersection of the lines 4x−3y=7 and 3x+4y+1=0. |
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Answer» Find the equation of the line passing through the points (2, 3) and the point of intersection of the lines 4x−3y=7 and 3x+4y+1=0. |
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| 1554. |
Why must electrostatic field at the surfaceof a charged conductor be perpendicularto every point on it?Foreign 2014, Delhi 2012 |
| Answer» Why must electrostatic field at the surfaceof a charged conductor be perpendicularto every point on it?Foreign 2014, Delhi 2012 | |
| 1555. |
if a body is moving on negative x axis can the dis†an ce and dispacement be equal |
| Answer» if a body is moving on negative x axis can the dis†an ce and dispacement be equal | |
| 1556. |
When a ball of significant mass moving with speed v collide with another ball of insignificant mass at rest then why is the speed of insignificant mass 2v |
| Answer» When a ball of significant mass moving with speed v collide with another ball of insignificant mass at rest then why is the speed of insignificant mass 2v | |
| 1557. |
A tangential force 10 N acts at the top of a thin spherical shell of mass m (5 kg) and radius R (20 cm). Find the acceleration of the shell if it rolls without slipping. |
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Answer» A tangential force 10 N acts at the top of a thin spherical shell of mass m (5 kg) and radius R (20 cm). Find the acceleration of the shell if it rolls without slipping. |
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| 1558. |
A particle of charge −1 C and mass 0.2 g moves in a circle of radius 1 m around an infinite long line charge of linear charge density +1 nC/m. The time period of motion is |
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Answer» A particle of charge −1 C and mass 0.2 g moves in a circle of radius 1 m around an infinite long line charge of linear charge density +1 nC/m. The time period of motion is |
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| 1559. |
The length of the solenoid is 0.1 m and its diameter is very small. A wire is wound over it in two layers. The number of turns in inner layer is 50 and that in outer layer is 40. The strength of current flowing in two layers in opposite direction is 3 A. Then the magnetic induction at the middle of solenoid is: |
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Answer» The length of the solenoid is 0.1 m and its diameter is very small. A wire is wound over it in two layers. The number of turns in inner layer is 50 and that in outer layer is 40. The strength of current flowing in two layers in opposite direction is 3 A. Then the magnetic induction at the middle of solenoid is: |
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| 1560. |
which one is dimension less physical quantity velocity gradient, force gradient,stress and angle |
| Answer» which one is dimension less physical quantity velocity gradient, force gradient,stress and angle | |
| 1561. |
The ceiling of a long hall is 25 m high. What is the maximum horizontal distance (in textm) that a ball thrown with a speed of 40 m/s from the floor can go without hitting the ceiling of the hall? (Take g=10 m/s2 and answer upto 2 decimal places) |
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Answer» The ceiling of a long hall is 25 m high. What is the maximum horizontal distance (in textm) that a ball thrown with a speed of 40 m/s from the floor can go without hitting the ceiling of the hall? (Take g=10 m/s2 and answer upto 2 decimal places) |
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| 1562. |
The work done by gravity when a coolie carries a luggage on a horizontal road is zero. How? |
| Answer» The work done by gravity when a coolie carries a luggage on a horizontal road is zero. How? | |
| 1563. |
In t=√2h/g we genrelly write h as distance but not displacement. but in v=√2gh h is taken as displament and not distance . Because in inclined plane problem of lenght l and height h t=√2l/g but v=√2ah , is this true |
| Answer» In t=√2h/g we genrelly write h as distance but not displacement. but in v=√2gh h is taken as displament and not distance . Because in inclined plane problem of lenght l and height h t=√2l/g but v=√2ah , is this true | |
| 1564. |
A truss is composed of members AB, BC, CD, AD and BD, as shown in the figure. A vertical load of 10 kN is applied at point D. The magnitude of force (in kN) in the member BC is |
Answer» A truss is composed of members AB, BC, CD, AD and BD, as shown in the figure. A vertical load of 10 kN is applied at point D. The magnitude of force (in kN) in the member BC is |
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| 1565. |
27.the heat liberated on complete combustion of 1 mole of CH4 gas to CO2 and H2O is 890kJ. Calculate heat evolved by 2.4 l of CH4 on complete combustion |
| Answer» 27.the heat liberated on complete combustion of 1 mole of CH4 gas to CO2 and H2O is 890kJ. Calculate heat evolved by 2.4 l of CH4 on complete combustion | |
| 1566. |
A pendulum of some length and a bob made of iron, has a time period Tiron. If another pendulum is made with the same length but with a copper bob, the new time period Tcopper would be equal to: |
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Answer» A pendulum of some length and a bob made of iron, has a time period Tiron. If another pendulum is made with the same length but with a copper bob, the new time period Tcopper would be equal to: |
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| 1567. |
To go home on Christmas Eve, Vinay travels by Bus at 80 km/hr (yes Bangalore bus service is awesome) from office to Bangalore Airport for (13)3 of the total time. Then he travels by flight at 700 km/hr for next (13)3 of time to reach Chennai Airport. Then he takes a cab to his house which travels at 120 km/hr (since its midnight). Find his average speed for the entire journey. |
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Answer» To go home on Christmas Eve, Vinay travels by Bus at 80 km/hr (yes Bangalore bus service is awesome) from office to Bangalore Airport for (13)3 of the total time. Then he travels by flight at 700 km/hr for next (13)3 of time to reach Chennai Airport. Then he takes a cab to his house which travels at 120 km/hr (since its midnight). Find his average speed for the entire journey. |
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| 1568. |
A 12-volt car battery can deliver a total charge of 100 ampere-hours. Using this battery how many 100 µF capacitors can be fully charged? |
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Answer» A 12-volt car battery can deliver a total charge of 100 ampere-hours. Using this battery how many 100 µF capacitors can be fully charged? |
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| 1569. |
.A particie is projectea lrom the groundl wtn aninitial speed of 'v at angle 0 with horizontal. Theaverage velocity of the particle between itspoint of projection and height point of trajectoryis7?/1 + 2cos" θ 7i2-/1 + cos-e(b)(a),(1 + 3cos2θ (d) vcose(c) |
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Answer» .A particie is projectea lrom the groundl wtn an initial speed of 'v at angle 0 with horizontal. The average velocity of the particle between its point of projection and height point of trajectory is 7? /1 + 2cos" θ 7i 2 -/1 + cos-e (b) (a) ,(1 + 3cos2θ (d) vcose (c) |
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| 1570. |
what are all difference between solonoid and a torroi |
| Answer» what are all difference between solonoid and a torroi | |
| 1571. |
Let the X−Y plane be the boundary between two transparent media. Medium 1 in Z≥0 has a refractive index of √2 and medium 2 in Z<0 has a refractive index of √3. A ray of light in medium 1 given by the vector →A=6√3^i+8√3^j−10^k is incident on the plane of separation. The angle of refraction in medium 2 is: |
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Answer» Let the X−Y plane be the boundary between two transparent media. Medium 1 in Z≥0 has a refractive index of √2 and medium 2 in Z<0 has a refractive index of √3. A ray of light in medium 1 given by the vector →A=6√3^i+8√3^j−10^k is incident on the plane of separation. The angle of refraction in medium 2 is: |
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| 1572. |
In the given transistor circuit, the base current is 35μA. The value of Rb is - |
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Answer» In the given transistor circuit, the base current is 35μA. The value of Rb is - |
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| 1573. |
Two rotating bodies A and B of masses m and 2m with moments of inertia IA and IB(IB>IA) have equal kinetic energy of rotation. If LA and LB be their angular momenta respectively, then |
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Answer» Two rotating bodies A and B of masses m and 2m with moments of inertia IA and IB(IB>IA) have equal kinetic energy of rotation. If LA and LB be their angular momenta respectively, then |
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| 1574. |
An ammeter is designed by shunting 12 Ω galvanometer with 6 Ω resistance, the additional shunt that should be connected across it to quadruple the range is |
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Answer» An ammeter is designed by shunting 12 Ω galvanometer with 6 Ω resistance, the additional shunt that should be connected across it to quadruple the range is |
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| 1575. |
A car travels north with a uniform velocity. It goes over a piece of mud which sticks to the tyre. The particles of the mud, as it leaves the ground are thrown |
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Answer» A car travels north with a uniform velocity. It goes over a piece of mud which sticks to the tyre. The particles of the mud, as it leaves the ground are thrown |
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| 1576. |
To a stationaty man rain is falling on his back with a velocity 6km/hr at angle 30°with vertical. To make rain velocity appear vertical the man should move |
| Answer» To a stationaty man rain is falling on his back with a velocity 6km/hr at angle 30°with vertical. To make rain velocity appear vertical the man should move | |
| 1577. |
Why is the 'Soddy and Fajan's Displacement Law' only applicable to Actinides . If we remove an alpha particle from the Lanthanides the group number won't change the shouldn't the law be also applicable to the Lanthanides ? |
| Answer» Why is the 'Soddy and Fajan's Displacement Law' only applicable to Actinides . If we remove an alpha particle from the Lanthanides the group number won't change the shouldn't the law be also applicable to the Lanthanides ? | |
| 1578. |
4.To reduce The range of voltmeter, its resistance needs to be reduced. A voltmeter has resistance R and range V. Which of the following resistances when connected in parallel will convert it into a voltmeter of range V/n? (A) nR (B) (n+1)R (C) (n-1)R (D) none of these |
| Answer» 4.To reduce The range of voltmeter, its resistance needs to be reduced. A voltmeter has resistance R and range V. Which of the following resistances when connected in parallel will convert it into a voltmeter of range V/n? (A) nR (B) (n+1)R (C) (n-1)R (D) none of these | |
| 1579. |
The energy of a charged capacitor is given by the expression |
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Answer» The energy of a charged capacitor is given by the expression |
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| 1580. |
A circular ring of radius r made of a non-conducting material is placed with its axis parallel to a uniform electric field. The ring is rotated about a diameter through 180°. Does the flux of the electric field change? If yes, does it decrease or increase?here will we take area vector of thickness of ring bcoz i guess other areas will be perpendicular to electric field |
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Answer» A circular ring of radius r made of a non-conducting material is placed with its axis parallel to a uniform electric field. The ring is rotated about a diameter through 180°. Does the flux of the electric field change? If yes, does it decrease or increase? here will we take area vector of thickness of ring bcoz i guess other areas will be perpendicular to electric field |
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| 1581. |
ntA wire loop is rotated in magnetic field. The fequency of change of direction of the iduced current is?n nt(1) Six times per revolutionn nt(2) Once per revolutionn nt(3) Twice per revolutionn nt(4) Four times per revolutionn ntn ntA. (1).n |
| Answer» ntA wire loop is rotated in magnetic field. The fequency of change of direction of the iduced current is?n nt(1) Six times per revolutionn nt(2) Once per revolutionn nt(3) Twice per revolutionn nt(4) Four times per revolutionn ntn ntA. (1).n | |
| 1582. |
A particle of mass m undergoing oscillation about x=0 has varying potential energy field given by U(x)=12kx2−V0cos(xa) where V0,k,a are constants and x is its displacement. If the amplitude of oscillation is much smaller than a, the time period is given by |
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Answer» A particle of mass m undergoing oscillation about x=0 has varying potential energy field given by U(x)=12kx2−V0cos(xa) where V0,k,a are constants and x is its displacement. If the amplitude of oscillation is much smaller than a, the time period is given by |
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| 1583. |
A block of mass m is revolving under the action of contact forces and gravity on a smooth horizontal plane with cons†an t speed v. If the radius of the circular path is R, then net contact force on the block is (1) mv^2/R (2) mg (3) m \sqrt{v^4/R^2+g^2} (4) mg+ mv^2/R |
| Answer» A block of mass m is revolving under the action of contact forces and gravity on a smooth horizontal plane with cons†an t speed v. If the radius of the circular path is R, then net contact force on the block is (1) mv^2/R (2) mg (3) m \sqrt{v^4/R^2+g^2} (4) mg+ mv^2/R | |
| 1584. |
What is the difference between relativistic mass and rest mass? |
| Answer» What is the difference between relativistic mass and rest mass? | |
| 1585. |
A particle moves from a point →r1=(2 m)→i+(3 m)→j to another point →r2=(3 m)→i++(2 m)→j during which a certain fore→F=(5 N)→i+(5 N)→j acts on it. Find the work done by the force on the particle during the displacement. |
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Answer» A particle moves from a point →r1=(2 m)→i+(3 m)→j to another point →r2=(3 m)→i++(2 m)→j during which a certain fore→F=(5 N)→i+(5 N)→j acts on it. Find the work done by the force on the particle during the displacement. |
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| 1586. |
The time constant of an LR circuit is 40 ms. The circuit is connected at t=0 and the steady-state current is found to be 2.0 A. Find the current at (a) t=10 ms (b) t=20 ms, (c) t=100 ms and (d) t=1 s. |
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Answer» The time constant of an LR circuit is 40 ms. The circuit is connected at t=0 and the steady-state current is found to be 2.0 A. Find the current at (a) t=10 ms (b) t=20 ms, (c) t=100 ms and (d) t=1 s. |
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| 1587. |
A body is allowed to slide on a frictionless track from rest position under gravity. The track ends into a circular loop of diameter D. What should be the minimum height of the curved track in terms of D so that it may complete the loop (successfully) ? |
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Answer» A body is allowed to slide on a frictionless track from rest position under gravity. The track ends into a circular loop of diameter D. What should be the minimum height of the curved track in terms of D so that it may complete the loop (successfully) ? |
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| 1588. |
In an a.c. circuit, resistance of R Ω is connected in series with an inductance L. If phase angle between voltage and current be 45∘. The value of inductive reactance is- |
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Answer» In an a.c. circuit, resistance of R Ω is connected in series with an inductance L. If phase angle between voltage and current be 45∘. The value of inductive reactance is- |
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| 1589. |
The resistance R=VI, where V=(50±2) V and I=(20±0.2) A. The percentage error in R is ′x′%. The value of ′x′ to the nearest integer is |
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Answer» The resistance R=VI, where V=(50±2) V and I=(20±0.2) A. The percentage error in R is ′x′%. The value of ′x′ to the nearest integer is |
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| 1590. |
What is the equivalent capacitance between A and B, if each capacitor is of 24 μF ? |
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Answer» What is the equivalent capacitance between A and B, if each capacitor is of 24 μF ? |
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| 1591. |
Two long current carrying thin wires, both with current I, are held by insulating threads of length L and are in equilibrium as shown in the figure, with threads making an angle 'θ' with the vertical. If mass per unit length of wire is λ, then the value of I is (g = gravitational acceleration) |
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Answer» Two long current carrying thin wires, both with current I, are held by insulating threads of length L and are in equilibrium as shown in the figure, with threads making an angle 'θ' with the vertical. If mass per unit length of wire is λ, then the value of I is (g = gravitational acceleration) |
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| 1592. |
A resistor and an inductor are connected in series across a voltage, V=283sin(314t). The current is found to be 4sin(314t−π/4). The value of resistance of resistor is - |
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Answer» A resistor and an inductor are connected in series across a voltage, V=283sin(314t). The current is found to be 4sin(314t−π/4). The value of resistance of resistor is - |
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| 1593. |
Two bodies of masses m1 and m2 are connected by a light string which passes over a frictionless massless pulley. If thepulley is moving upward with uniform acceleration g/2 then ,tension in the string will be |
| Answer» Two bodies of masses m1 and m2 are connected by a light string which passes over a frictionless massless pulley. If thepulley is moving upward with uniform acceleration g/2 then ,tension in the string will be | |
| 1594. |
Graph of mode -x3+3mode x+2 |
| Answer» Graph of mode -x3+3mode x+2 | |
| 1595. |
The frequency of output and duty cycle of 555 timer, configured in astable mode (oscillator) is |
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Answer» The frequency of output and duty cycle of 555 timer, configured in astable mode (oscillator) is |
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| 1596. |
When a process is carried out in a closed vessel then how△ H=△ E |
| Answer» When a process is carried out in a closed vessel then how△ H=△ E | |
| 1597. |
A bullet of mass 0.012 kg and horizontal speed 70 m s–1 strikes a block of wood of mass 0.4 kg and instantly comes to rest with respect to the block. The block is suspended from the ceiling by means of thin wires. Calculate the height to which the block rises. Also, estimate the amount of heat produced in the block. |
| Answer» A bullet of mass 0.012 kg and horizontal speed 70 m s–1 strikes a block of wood of mass 0.4 kg and instantly comes to rest with respect to the block. The block is suspended from the ceiling by means of thin wires. Calculate the height to which the block rises. Also, estimate the amount of heat produced in the block. | |
| 1598. |
A linear aperture whose width is 0.02 cm is placed immediately in front of a lens of focal length 60 cm. The aperture is illuminated normally by a parallel beam of wavelength 5×10−5 cm. The distance of the first dark band of the diffraction pattern from the centre of the screen is |
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Answer» A linear aperture whose width is 0.02 cm is placed immediately in front of a lens of focal length 60 cm. The aperture is illuminated normally by a parallel beam of wavelength 5×10−5 cm. The distance of the first dark band of the diffraction pattern from the centre of the screen is |
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| 1599. |
If earth stands still what will be its effect on man’s weight |
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Answer» If earth stands still what will be its effect on man’s weight |
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| 1600. |
In a Rankine cycle the steam enters at 200 bar and 400°C to the turbine, condenser pressure is 10 kPa. Power output of cycle is 100 MW. Cooling water is used to cool the steam in condenser.When pump work is not neglected and cooling water enters at 30° C and leaves at 50°C. The mass flow rate of cooling water required is _____kg/s. Data : at 200 bar, 400°C h=3400kJ/kg,s=3.35kJ/kgKat 10 kPahf=191.83kJ/kg,hg=2584.8kJ/kgsδ=8.1511kJ/kgK,sfg=7.5018kf/kgK,vf=0.001m/kgSpecific heat capacity for cooling water =4.18 kJ/kgk 1588.27 |
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Answer» In a Rankine cycle the steam enters at 200 bar and 400°C to the turbine, condenser pressure is 10 kPa. Power output of cycle is 100 MW. Cooling water is used to cool the steam in condenser.When pump work is not neglected and cooling water enters at 30° C and leaves at 50°C. The mass flow rate of cooling water required is _____kg/s. Data : at 200 bar, 400°C h=3400kJ/kg,s=3.35kJ/kgK at 10 kPa hf=191.83kJ/kg,hg=2584.8kJ/kg sδ=8.1511kJ/kgK,sfg=7.5018kf/kgK,vf=0.001m/kg Specific heat capacity for cooling water =4.18 kJ/kgk
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