9478 + Interview Questions in Physics Page 77 InterviewSolution

3801.	What are the special advantages of horse shoe magnets
Answer» What are the special advantages of horse shoe magnets

Discussion

3802.	A 45 kg boy whose leg bones are 5 cm2 in area and 50 cm long fall through a height of 2 m without breaking his leg bones. If the bones can stand a stress of 0.9×108 N/m2, calculate the Young's modulus for the material of the bones.(Use g=10 m/s2)
Answer» A $45 kg$ boy whose leg bones are $5 {cm}^{2}$ in area and $50 cm$ long fall through a height of $2 m$ without breaking his leg bones. If the bones can stand a stress of $0.9 \times 10^{8} {N/m}^{2}$ , calculate the Young's modulus for the material of the bones. (Use $g = 10 {m/s}^{2}$ )

Discussion

3803.	Two cubic blocks having masses 1 kg and 2 kg respectively are connected by a string AB of mass 1 kg . The blocks are placed on a smooth horizontal surface . Block of mass 1 kg is pulled by a horizontal force F of magnitude 8 N . Find the tension in the string at points A and B
Answer» Two cubic blocks having masses 1 kg and 2 kg respectively are connected by a string AB of mass 1 kg . The blocks are placed on a smooth horizontal surface . Block of mass 1 kg is pulled by a horizontal force F of magnitude 8 N . Find the tension in the string at points A and B

Discussion

3804.	In a charging RC circuit, how many time constants will elapse before the power delivered by the battery drops to half of its maximum value.
Answer» In a charging $R C$ circuit, how many time constants will elapse before the power delivered by the battery drops to half of its maximum value.

Discussion

3805.	4.What are the names of each subshell in shell number 7
Answer» 4.What are the names of each subshell in shell number 7

Discussion

3806.	A circular frame of wire having radius r is floating on the surface of liquid of surface tension σ. The additional force other than its weight, required to pull out the frame from the liquid is
Answer» A circular frame of wire having radius r is floating on the surface of liquid of surface tension σ. The additional force other than its weight, required to pull out the frame from the liquid is

Discussion

3807.	What is the constellation in the shape of a winged horse called?
Answer» What is the constellation in the shape of a winged horse called?

Discussion

3808.	Consider the following statements: Statement 1: Cone cells are sensitive to dim light. Statement 2: Rod cells are sensitive to bright light. Choose the correct option:
Answer» Consider the following statements: Statement 1: Cone cells are sensitive to dim light. Statement 2: Rod cells are sensitive to bright light. Choose the correct option:

Discussion

3809.	All stars appear to revolve around which of the following star?
Answer» All stars appear to revolve around which of the following star?

Discussion

3810.	When a body is pure rolling on an inclined plane with friction, why the frictional force always acts upward even if the body is climbing up the inclined plane?
Answer» When a body is pure rolling on an inclined plane with friction, why the frictional force always acts upward even if the body is climbing up the inclined plane?

Discussion

3811.	Which of the following is/are not true about sundials?
Answer» Which of the following is/are not true about sundials?

Discussion

3812.	two point charges q each are placed at coordinates (-a,0)and (+a,0) a third charges qnot is placed at (0,y)find the magnitude of repulsive force on the charge qnot find the value of y for which the force is max place the force as a function of y qualitatively
Answer» two point charges q each are placed at coordinates (-a,0)and (+a,0) a third charges qnot is placed at (0,y)find the magnitude of repulsive force on the charge qnot find the value of y for which the force is max place the force as a function of y qualitatively

Discussion

3813.	53.a wave packet center frequency w is propagating in a dispersive mediumwith phase velocity of 1.5x10power m/s8 . when the frequency w is increased by 2% the phase velocity is found to decreased by 3% . what is the group velocity of wave pocket? a. 0.25x109m/s b 0.6x108m/s c. 1.0x108m/s d. o.75x108m/s
Answer» 53.a wave packet center frequency w is propagating in a dispersive mediumwith phase velocity of 1.5x10power m/s8 . when the frequency w is increased by 2% the phase velocity is found to decreased by 3% . what is the group velocity of wave pocket? a. 0.25x109m/s b 0.6x108m/s c. 1.0x108m/s d. o.75x108m/s

Discussion

3814.	An arrow fired from a bow attains a maximum height of 5m from the level it is released. If the mass of the arrow is 500 grams, work done by the bow on arrow is greater than which of the following values? (Select all that apply ; Assume,(g = 10 ms−1)
Answer» An arrow fired from a bow attains a maximum height of 5m from the level it is released. If the mass of the arrow is 500 grams, work done by the bow on arrow is greater than which of the following values? (Select all that apply ; Assume, (g = $10 m s^{- 1}$ )

Discussion

3815.	what is refracting index?
Answer» what is refracting index?

Discussion

3816.	What is gold leaf electroscope??
Answer» What is gold leaf electroscope??

Discussion

3817.	Define the following terms : (a) Amplitude (b) Frequency (c) Time period.
Answer» Define the following terms : (a) Amplitude (b) Frequency (c) Time period.

3817.

Define the following terms : (a) Amplitude (b) Frequency (c) Time period.

Answer»

Define the following terms :

(a) Amplitude

(b) Frequency

(c) Time period.

Discussion

3818.	Which type of surfaces produce (a) least friction, and (b) too much friction ?
Answer» Which type of surfaces produce (a) least friction, and (b) too much friction ?

Discussion

3819.	If pressure at half the depth of a lake is equal to pressure at the bottom of the lake than what is the depth of the lake?
Answer» If pressure at half the depth of a lake is equal to pressure at the bottom of the lake than what is the depth of the lake?

Discussion

3820.	Which of the following mirrors has the highest field of view?
Answer» Which of the following mirrors has the highest field of view?

Discussion

3821.	why does the sun appear to be larger and brighter than other stars ?
Answer» why does the sun appear to be larger and brighter than other stars ?

Discussion

3822.	What is femtometre
Answer» What is femtometre

Discussion

3823.	A pendulum oscillates 1000 times in 50 sec. find its time period and frequency.
Answer» A pendulum oscillates 1000 times in 50 sec. find its time period and frequency.

Discussion

3824.	If the hands of a clock show 5.15, what time will its image in a plane mirror show?
Answer» If the hands of a clock show 5.15, what time will its image in a plane mirror show?

Discussion

3825.	Question 15Sound produced by a thunderstorm is heard 10 s after the lightning is seen. Calculate the approximate distance of the thunder cloud. (Given speed of sound = 340 ms−1)
Answer» Question 15 Sound produced by a thunderstorm is heard 10 s after the lightning is seen. Calculate the approximate distance of the thunder cloud. (Given speed of sound = $340 m s^{- 1}$ )

Discussion

3826.	In prresence of external magnetic field , f subshell is (1) 5 fold degenerate (2) 3 fold degenerate (3) 7 fold degenerate (4) Non-degenerate
Answer» In prresence of external magnetic field , f subshell is (1) 5 fold degenerate (2) 3 fold degenerate (3) 7 fold degenerate (4) Non-degenerate

Discussion

3827.	When can you see an image of an object in a plane mirror?
Answer» When can you see an image of an object in a plane mirror?

Discussion

3828.	Two point charges +4 q and +q are separated by distance, where should a third point charge o be placed that the whole system remains in equilibrium ??
Answer» Two point charges +4 q and +q are separated by distance, where should a third point charge o be placed that the whole system remains in equilibrium ??

Discussion

3829.	Can you tell me the outline of this lesson sound light frequency amplitude wavelength time period an etc
Answer» Can you tell me the outline of this lesson sound light frequency amplitude wavelength time period an etc

Discussion

3830.	When a charged glass rod rubbed with silk is brought near a charged plastic straw rubbed with polythene, there is an attraction between the two. Identify the charge on the plastic straw.
Answer» When a charged glass rod rubbed with silk is brought near a charged plastic straw rubbed with polythene, there is an attraction between the two. Identify the charge on the plastic straw.

Discussion

3831.	Explain why, a speedboat has a streamlined shape.
Answer» Explain why, a speedboat has a streamlined shape.

Discussion

3832.	The harder you beat a table , louder is the sound . List two reasons for it
Answer» The harder you beat a table , louder is the sound . List two reasons for it

Discussion

3833.	What r systematic errors
Answer» What r systematic errors

Discussion

3834.	State the two kinds of spherical mirrors and distinguish them with the aid of proper diagrams.
Answer» State the two kinds of spherical mirrors and distinguish them with the aid of proper diagrams.

Discussion

3835.	WHAT HAPPEN WHEN 1salt bridge solution is a weak electrolyte 2.why solution should be inert towards both electrod 3 why sal;t brige solution is made in agar and gelatin to make it semisolid
Answer» WHAT HAPPEN WHEN 1salt bridge solution is a weak electrolyte 2.why solution should be inert towards both electrod 3 why sal;t brige solution is made in agar and gelatin to make it semisolid

Discussion

3836.	Density of a substance is given by the formula density=mass/volume. Calculate the density of iron(in g/cu.cm) if a piece of iron of volume 2.50 cu.cm weight 19.675 gram.
Answer» Density of a substance is given by the formula density=mass/volume. Calculate the density of iron(in g/cu.cm) if a piece of iron of volume 2.50 cu.cm weight 19.675 gram.

Discussion

3837.	Material A gets magnetised under the influence of external magnetic field while material B does not get magnetised. Material A retains the acquired magnetism for a long time. Material C magnetises under the influence of a magnetic field and does not retain it for a long time. Which of them is the most suitable to make electromagnets?
Answer» Material A gets magnetised under the influence of external magnetic field while material B does not get magnetised. Material A retains the acquired magnetism for a long time. Material C magnetises under the influence of a magnetic field and does not retain it for a long time. Which of them is the most suitable to make electromagnets?

Discussion

3838.	Two identical capacitor C1 and C2 of capacitance 10micro farad are connected in series to a cell of emf 12V. Capacitor C2 is filled with dielectric constant=4. The energy stored in capacitor C2 is
Answer» Two identical capacitor C1 and C2 of capacitance 10micro farad are connected in series to a cell of emf 12V. Capacitor C2 is filled with dielectric constant=4. The energy stored in capacitor C2 is

Discussion

3839.	A 60 mm long and 6 mm thick fillet weld carries a steady load of 15 kN along the weld. The shear strength of the weld material is equal to 200 MPa. The factor of safety is
Answer» A $60 m m$ long and $6 m m$ thick fillet weld carries a steady load of $15 k N$ along the weld. The shear strength of the weld material is equal to $200 M P a$ . The factor of safety is

Discussion

3840.	Find the height of the point vertically above the earth's surface at which the acceleration due to gravity becomes 1% of its value at the surface ?(R is the radius of the earth )
Answer» Find the height of the point vertically above the earth's surface at which the acceleration due to gravity becomes $1 %$ of its value at the surface ? $(R$ is the radius of the earth $)$

Discussion

3841.	If the radius of curvature of a concave mirror is 20 cm, then its focal length is:10
Answer» If the radius of curvature of a concave mirror is 20 cm, then its focal length is: 10

Discussion

3842.	A train engine is attached with 10 carriages. The length of each carriage is 10 m and the length of the engine is 30 m. The train is running at a speed of 108 km/h. The driver is at the front of the engine as he is driving the train. The guard is sitting at the front of the last carriage. The driver passed a post. After how many more seconds will the guard pass the post?
Answer» A train engine is attached with 10 carriages. The length of each carriage is 10 m and the length of the engine is 30 m. The train is running at a speed of 108 km/h. The driver is at the front of the engine as he is driving the train. The guard is sitting at the front of the last carriage. The driver passed a post. After how many more seconds will the guard pass the post?

Discussion

3843.	The given figure shows some clouds and ground. The upper clouds, the lower clouds, and the ground are labelled as I, II, and III respectively. During lightning, different charges accumulate on I, II,and III. What are the respective natures of the charges accumulated on I, II, and III?
Answer» The given figure shows some clouds and ground. The upper clouds, the lower clouds, and the ground are labelled as I, II, and III respectively. During lightning, different charges accumulate on I, II,and III. What are the respective natures of the charges accumulated on I, II, and III?

3843.

The given figure shows some clouds and ground. The upper clouds, the lower clouds, and the ground are labelled as I, II, and III respectively. During lightning, different charges accumulate on I, II,and III. What are the respective natures of the charges accumulated on I, II, and III?

Answer»

The given figure shows some clouds and ground. The upper clouds, the lower clouds, and the ground are labelled as I, II, and III respectively.

During lightning, different charges accumulate on I, II,and III. What are the respective natures of the charges accumulated on I, II, and III?

Discussion

3844.	Why electric current is scalar?
Answer» Why electric current is scalar?

Discussion

3845.	differentiate between concave and convex mirror
Answer» differentiate between concave and convex mirror

Discussion

3846.	Which of the following actions does not require any force?
Answer» Which of the following actions does not require any force?

Discussion

3847.	What is the relation between 'time-period' and 'frequency' of an oscillating body?
Answer» What is the relation between 'time-period' and 'frequency' of an oscillating body?

Discussion

3848.	What is the Kelvin scale of temperature ?
Answer» What is the Kelvin scale of temperature ?

Discussion

3849.	An ant drags a piece of sweet on a straight path from the origin of the co-ordinate axes (0,0), to the point (3,4) (1 unit = 1 metre). What is the work done by the ant, if she applies a force of 1N ?
Answer» An ant drags a piece of sweet on a straight path from the origin of the co-ordinate axes (0,0), to the point (3,4) (1 unit = 1 metre). What is the work done by the ant, if she applies a force of $1 N$ ?

Discussion

3850.	A man of mass m is suspended in air by holding the rope of a balloon of mass M. As the man climbs up the rope, the balloon
Answer» A man of mass m is suspended in air by holding the rope of a balloon of mass M. As the man climbs up the rope, the balloon

Discussion

Explore topic-wise InterviewSolutions in .

What are the special advantages of horse shoe magnets

A 45 kg boy whose leg bones are 5 cm2 in area and 50 cm long fall through a height of 2 m without breaking his leg bones. If the bones can stand a stress of 0.9×108 N/m2, calculate the Young's modulus for the material of the bones.(Use g=10 m/s2)

Two cubic blocks having masses 1 kg and 2 kg respectively are connected by a string AB of mass 1 kg . The blocks are placed on a smooth horizontal surface . Block of mass 1 kg is pulled by a horizontal force F of magnitude 8 N . Find the tension in the string at points A and B

In a charging RC circuit, how many time constants will elapse before the power delivered by the battery drops to half of its maximum value.

4.What are the names of each subshell in shell number 7

A circular frame of wire having radius r is floating on the surface of liquid of surface tension σ. The additional force other than its weight, required to pull out the frame from the liquid is

What is the constellation in the shape of a winged horse called?

Consider the following statements: Statement 1: Cone cells are sensitive to dim light. Statement 2: Rod cells are sensitive to bright light. Choose the correct option:

All stars appear to revolve around which of the following star?

When a body is pure rolling on an inclined plane with friction, why the frictional force always acts upward even if the body is climbing up the inclined plane?

Which of the following is/are not true about sundials?

two point charges q each are placed at coordinates (-a,0)and (+a,0) a third charges qnot is placed at (0,y)find the magnitude of repulsive force on the charge qnot find the value of y for which the force is max place the force as a function of y qualitatively

An arrow fired from a bow attains a maximum height of 5m from the level it is released. If the mass of the arrow is 500 grams, work done by the bow on arrow is greater than which of the following values? (Select all that apply ; Assume,(g = 10 ms−1)

what is refracting index?

What is gold leaf electroscope??

Define the following terms : (a) Amplitude (b) Frequency (c) Time period.

Which type of surfaces produce (a) least friction, and (b) too much friction ?

If pressure at half the depth of a lake is equal to pressure at the bottom of the lake than what is the depth of the lake?

Which of the following mirrors has the highest field of view?

why does the sun appear to be larger and brighter than other stars ?

What is femtometre

A pendulum oscillates 1000 times in 50 sec. find its time period and frequency.

If the hands of a clock show 5.15, what time will its image in a plane mirror show?

Question 15Sound produced by a thunderstorm is heard 10 s after the lightning is seen. Calculate the approximate distance of the thunder cloud. (Given speed of sound = 340 ms−1)

In prresence of external magnetic field , f subshell is (1) 5 fold degenerate (2) 3 fold degenerate (3) 7 fold degenerate (4) Non-degenerate

When can you see an image of an object in a plane mirror?

Two point charges +4 q and +q are separated by distance, where should a third point charge o be placed that the whole system remains in equilibrium ??

Can you tell me the outline of this lesson sound light frequency amplitude wavelength time period an etc

When a charged glass rod rubbed with silk is brought near a charged plastic straw rubbed with polythene, there is an attraction between the two. Identify the charge on the plastic straw.

Explain why, a speedboat has a streamlined shape.

The harder you beat a table , louder is the sound . List two reasons for it

What r systematic errors

State the two kinds of spherical mirrors and distinguish them with the aid of proper diagrams.

WHAT HAPPEN WHEN 1salt bridge solution is a weak electrolyte 2.why solution should be inert towards both electrod 3 why sal;t brige solution is made in agar and gelatin to make it semisolid

Density of a substance is given by the formula density=mass/volume. Calculate the density of iron(in g/cu.cm) if a piece of iron of volume 2.50 cu.cm weight 19.675 gram.

Two identical capacitor C1 and C2 of capacitance 10micro farad are connected in series to a cell of emf 12V. Capacitor C2 is filled with dielectric constant=4. The energy stored in capacitor C2 is

A 60 mm long and 6 mm thick fillet weld carries a steady load of 15 kN along the weld. The shear strength of the weld material is equal to 200 MPa. The factor of safety is

Find the height of the point vertically above the earth's surface at which the acceleration due to gravity becomes 1% of its value at the surface ?(R is the radius of the earth )

If the radius of curvature of a concave mirror is 20 cm, then its focal length is:10

The given figure shows some clouds and ground. The upper clouds, the lower clouds, and the ground are labelled as I, II, and III respectively. During lightning, different charges accumulate on I, II,and III. What are the respective natures of the charges accumulated on I, II, and III?

Why electric current is scalar?

differentiate between concave and convex mirror

Which of the following actions does not require any force?

What is the relation between 'time-period' and 'frequency' of an oscillating body?

What is the Kelvin scale of temperature ?

An ant drags a piece of sweet on a straight path from the origin of the co-ordinate axes (0,0), to the point (3,4) (1 unit = 1 metre). What is the work done by the ant, if she applies a force of 1N ?

A man of mass m is suspended in air by holding the rope of a balloon of mass M. As the man climbs up the rope, the balloon