6277 + Interview Questions in Physics Page 12 InterviewSolution

551.	An open beaker kept on a table started leaking when two holes were made at the same level. This is because
Answer» An open beaker kept on a table started leaking when two holes were made at the same level. This is because

Discussion

552.	The north pole of a magnet is brought near a metallic ring.The direction of the induced i in the ring
Answer» The north pole of a magnet is brought near a metallic ring.The direction of the induced i in the ring

Discussion

553.	One end of a 10 cm long silk thread is fixed to a large vertical surface of a charged nonconducting plate and the other end is fastened to a small ball having a massof 10 g and a charge of 40 x 10-6C. In equilibrium, the thread makes an angle of 60degre with the vertical. Find thesurface charge density on the plate.
Answer» One end of a 10 cm long silk thread is fixed to a large vertical surface of a charged nonconducting plate and the other end is fastened to a small ball having a massof 10 g and a charge of 40 x 10-6C. In equilibrium, the thread makes an angle of 60degre with the vertical. Find thesurface charge density on the plate.

Discussion

554.	Define time
Answer» Define time

Discussion

555.	75.Plot a graph between the voltage and the current for a substance which do not obey Ohm's law.
Answer» 75.Plot a graph between the voltage and the current for a substance which do not obey Ohm's law.

Discussion

556.	A particle moves rectilinearly its displacement x at time t is given by x^2 = at^2 + b where a and b are constants its acceleration at time t is proportional to
Answer» A particle moves rectilinearly its displacement x at time t is given by x^2 = at^2 + b where a and b are constants its acceleration at time t is proportional to

Discussion

557.	Which of the following represents the symbol for a series combination of cells?
Answer» Which of the following represents the symbol for a series combination of cells?

Discussion

558.	The distance between a crest and the next trough along the direction of propagation of the wave will be equal to:
Answer» The distance between a crest and the next trough along the direction of propagation of the wave will be equal to:

Discussion

559.	ntA ball with charge -50e is placed at the centre of a hollow spherical shell has a net charge of -50e.What is the charge on the shell's outer surface?n nta)-50en ntb)ZEROn ntc)-100en ntd)+100en ntn
Answer» ntA ball with charge -50e is placed at the centre of a hollow spherical shell has a net charge of -50e.What is the charge on the shell's outer surface?n nta)-50en ntb)ZEROn ntc)-100en ntd)+100en ntn

Discussion

560.	What is a thermometer and how does it work. [3 MARKS]
Answer» What is a thermometer and how does it work. [3 MARKS]

Discussion

561.	If air is a bad conductor of heat then how our hands become warmer when we place it near a candle
Answer» If air is a bad conductor of heat then how our hands become warmer when we place it near a candle

Discussion

562.	Two wires of same material and length but diameters in the ratio 1:2, are stretched by the same force. The potential energy per unit volume for the two wires will be in the ratio,
Answer» Two wires of same material and length but diameters in the ratio $1 : 2$ , are stretched by the same force. The potential energy per unit volume for the two wires will be in the ratio,

Discussion

563.	A ball is thrown up with a velocity of 10 m/s. The maximum height it reaches is:(Take g=10 m/s2)
Answer» A ball is thrown up with a velocity of $10 m / s$ . The maximum height it reaches is: (Take $g = 10 m / s^{2}$ )

Discussion

564.	Figure shows the word written in front of a plane mirror. Show how the word would appear in the mirror.
Answer» Figure shows the word written in front of a plane mirror. Show how the word would appear in the mirror.

Discussion

565.	In the given figure , find the lateral shift produced by the glass slab.
Answer» In the given figure , find the lateral shift produced by the glass slab.

Discussion

566.	why KE at triple point is same for liquid gas and solid
Answer» why KE at triple point is same for liquid gas and solid

Discussion

567.	During a thunderstorm, the sound of a thunder is heard after the lightning is seen. Why?
Answer» During a thunderstorm, the sound of a thunder is heard after the lightning is seen. Why?

Discussion

568.	By the process of convection the transfer of heat is always in which direction A. Upward B.downward C.sideways D. In all possible direction
Answer» By the process of convection the transfer of heat is always in which direction A. Upward B.downward C.sideways D. In all possible direction

Discussion

569.	In the given figure, two balloons are suspended freely by two light threads. Initially, they are at a distance of 10 cm. When we blow air in the space between the two balloons, the distance between them will be:
Answer» In the given figure, two balloons are suspended freely by two light threads. Initially, they are at a distance of 10 cm. When we blow air in the space between the two balloons, the distance between them will be:

569.

In the given figure, two balloons are suspended freely by two light threads. Initially, they are at a distance of 10 cm. When we blow air in the space between the two balloons, the distance between them will be:

Answer»

In the given figure, two balloons are suspended freely by two light threads. Initially, they are at a distance of 10 cm. When we blow air in the space between the two balloons, the distance between them will be:

Discussion

570.	A particle execute simple harmonic motion with amplitude a the time period of oscillation is T the time taken by the particle to travel from mid way between mean positions to the extreme position is
Answer» A particle execute simple harmonic motion with amplitude a the time period of oscillation is T the time taken by the particle to travel from mid way between mean positions to the extreme position is

Discussion

571.	(a) Why are the windows of the houses in coastal areas made to face the sea? (b) What is a land breeze? [3 MARKS]
Answer» (a) Why are the windows of the houses in coastal areas made to face the sea? (b) What is a land breeze? [3 MARKS]

Discussion

572.	What is a constellation? Name any two constellations.
Answer» What is a constellation? Name any two constellations.

Discussion

573.	Question 1(iv)Give an example of a metal which is a poor conductor of heat.
Answer» Question 1(iv) Give an example of a metal which is a poor conductor of heat.

Discussion

574.	The hog rider in the game "Clash of Clans" at his maximum speed can cover 24m sized square tiles in 5s. And to attain his maximum speed, he takes 6s. What is the magnitude of his acceleration?
Answer» The hog rider in the game "Clash of Clans" at his maximum speed can cover $24 m$ sized square tiles in $5 s$ . And to attain his maximum speed, he takes $6 s .$ What is the magnitude of his acceleration?

Discussion

575.	Question 2Write an expression for the kinetic energy of an object.
Answer» Question 2 Write an expression for the kinetic energy of an object.

Discussion

576.	An object ′O′ is placed between two parallel mirrors M1 and M2 as shown in the figure. Find the distance between the 1st image formed by M1 and 3rd image formed by M2.[Assume, the first reflection occurs at M1].
Answer» An object $^{'} O^{'}$ is placed between two parallel mirrors $M_{1}$ and $M_{2}$ as shown in the figure. Find the distance between the $1^{s t}$ image formed by $M_{1}$ and $3^{r d}$ image formed by $M_{2}$ . [Assume, the first reflection occurs at $M_{1}$ ].

Discussion

577.	Explain term and how they related to each other --- 1 velocity 2 displacement 3 acceleration
Answer» Explain term and how they related to each other --- 1 velocity 2 displacement 3 acceleration

Discussion

578.	In nuclear power stations, the heat energy released by the reactors is used to generate ____.
Answer» In nuclear power stations, the heat energy released by the reactors is used to generate ____.

Discussion

579.	Question 23The strips of an electroscope diverge when a charged body is brought in contact with the metal clip. Now the clip is touched gently by our hand. What will happen to the strips? Explain.
Answer» Question 23 The strips of an electroscope diverge when a charged body is brought in contact with the metal clip. Now the clip is touched gently by our hand. What will happen to the strips? Explain.

579.

Question 23The strips of an electroscope diverge when a charged body is brought in contact with the metal clip. Now the clip is touched gently by our hand. What will happen to the strips? Explain.

Answer»

Question 23

The strips of an electroscope diverge when a charged body is brought in contact with the metal clip. Now the clip is touched gently by our hand. What will happen to the strips? Explain.

Discussion

580.	two rings have their moment of inertia in the ratio of 2:1 and their diameters in the ratio of 4:1 the ratio of their respective masses
Answer» two rings have their moment of inertia in the ratio of 2:1 and their diameters in the ratio of 4:1 the ratio of their respective masses

Discussion

581.	Why the force of friction on a body kept on the tabletop does not depend on the area of contact?
Answer» Why the force of friction on a body kept on the tabletop does not depend on the area of contact?

Discussion

582.	Ehat does internal supply mean in electrolytic cell
Answer» Ehat does internal supply mean in electrolytic cell

Discussion

583.

A BIG WINDA big wind is blowing.Look, the leaves are flying!The wind can blow trees down.It can blow houses down.My house is old.Will it come down?• Are these sentences Right (✓) or Wrong (✕) ? 1. The wind can blow down a house. 2. The wind can blow down a field. 3. The wind can blow down a child. 4. The wind can blow down a tree. 5. The wind can blow down a river.

Answer» A BIG WIND

A big wind is blowing.

Look, the leaves are flying!

The wind can blow trees down.

It can blow houses down.

My house is old.

Will it come down?

• Are these sentences Right (✓) or Wrong (✕) ?

1.	The wind can blow down a house.
2.	The wind can blow down a field.
3.	The wind can blow down a child.
4.	The wind can blow down a tree.
5.	The wind can blow down a river.

Discussion

584.	Establish the relation for the frequency of vibration for a stretched string of length (l),linear mass density m and tension in the string
Answer» Establish the relation for the frequency of vibration for a stretched string of length (l),linear mass density m and tension in the string

Discussion

585.	Question 24The distance (in km) travelled in h hours at a constant speed of 40 km per hour is ___.
Answer» Question 24 The distance (in km) travelled in h hours at a constant speed of 40 km per hour is ___.

585.

Question 24The distance (in km) travelled in h hours at a constant speed of 40 km per hour is ___.

Answer»

Question 24

The distance (in km) travelled in h hours at a constant speed of 40 km per hour is ___.

Discussion

586.	If 2kg ice at -20^° C is mixed with 5kg water at 20^° C . Then find the temperature and compositionof the final mixture.
Answer» If 2kg ice at -20^° C is mixed with 5kg water at 20^° C . Then find the temperature and compositionof the final mixture.

Discussion

587.	A body travels 200 cm in the first 2 seconds and 220 cm in the next 5 seconds. Calculate the velocity at the end of the seventh second from the start
Answer» A body travels 200 cm in the first 2 seconds and 220 cm in the next 5 seconds. Calculate the velocity at the end of the seventh second from the start

Discussion

588.	the speed of a car was 50 km/hr for the first 900 sec then 40km/hr for the next 50km and then the car decelerated uniformly at 10km/hr sq till it comes to rest. average speed of the car was?
Answer» the speed of a car was 50 km/hr for the first 900 sec then 40km/hr for the next 50km and then the car decelerated uniformly at 10km/hr sq till it comes to rest. average speed of the car was?

Discussion

589.	Question 2 (b)Convert the following temperatures to the Kelvin scale.(b)373∘C.
Answer» Question 2 (b) Convert the following temperatures to the Kelvin scale. $(b) 373^{\circ} C$ .

Discussion

590.	Two metallic wires A and B are connected in series. Wire A has length L and radius r, while B has length 2L and radius 2r. Find the ratio of the total resistance of series combination.
Answer» Two metallic wires A and B are connected in series. Wire A has length L and radius r, while B has length 2L and radius 2r. Find the ratio of the total resistance of series combination.

Discussion

591.	A particle is moving with v= k( y i cap + x jcap) where k is constant.The general equation of the path is
Answer» A particle is moving with v= k( y i cap + x jcap) where k is constant.The general equation of the path is

Discussion

592.	An object is approaching a fixed plane mirror with velocity 5 m/s making an angle of 45∘ with the normal. The speed of image with respect to mirror is
Answer» An object is approaching a fixed plane mirror with velocity $5 m/s$ making an angle of $45^{\circ}$ with the normal. The speed of image with respect to mirror is

Discussion

593.	2. A block of mass m is stationary on a horizontal surface. It is connected with a string which has no tension. The coefficient of friction between the block and surface is m. Then, the frictional force between the block and surface is
Answer» 2. A block of mass m is stationary on a horizontal surface. It is connected with a string which has no tension. The coefficient of friction between the block and surface is m. Then, the frictional force between the block and surface is

Discussion

594.	Which of the following is related to the formation of a solar eclipse?
Answer» Which of the following is related to the formation of a solar eclipse?

Discussion

595.	an athlete completes one round of a circular track of diameter 200m in 40 seconds what will be the distance covered and the displacement at the end of 2 minutes 20 seconds
Answer» an athlete completes one round of a circular track of diameter 200m in 40 seconds what will be the distance covered and the displacement at the end of 2 minutes 20 seconds

Discussion

596.	The type of object that doesn't cast shadow is known as ___ object.
Answer» The type of object that doesn't cast shadow is known as ___ object.

Discussion

597.	What is the difference between uniform and nonuniform motion?
Answer» What is the difference between uniform and nonuniform motion?

Discussion

598.	The air near the source of heat:
Answer» The air near the source of heat:

Discussion

599.	Fill in the blanks(a) Thevolume of a cube of side 1 cm is equal to.....m3(b) Thesurface area of a solid cylinder of radius 2.0 cm and height 10.0 cmis equal to ... (mm)2(c) Avehicle moving with a speed of 18 km h–1covers....min 1 s(d) Therelative density of lead is 11.3. Its density is ....g cm–3or. ...kg m–3.
Answer» Fill in the blanks (a) The volume of a cube of side 1 cm is equal to.....m³ (b) The surface area of a solid cylinder of radius 2.0 cm and height 10.0 cm is equal to ... (mm)² (c) A vehicle moving with a speed of 18 km h^–1covers....m in 1 s (d) The relative density of lead is 11.3. Its density is ....g cm^–3or . ...kg m^–3.

599.

Fill in the blanks(a) Thevolume of a cube of side 1 cm is equal to.....m3(b) Thesurface area of a solid cylinder of radius 2.0 cm and height 10.0 cmis equal to ... (mm)2(c) Avehicle moving with a speed of 18 km h–1covers....min 1 s(d) Therelative density of lead is 11.3. Its density is ....g cm–3or. ...kg m–3.

Answer»

Fill in the blanks

(a) The
volume of a cube of side 1 cm is equal to.....m³

(b) The
surface area of a solid cylinder of radius 2.0 cm and height 10.0 cm
is equal to ... (mm)²

(c) A
vehicle moving with a speed of 18 km h^–1covers....m
in 1 s

(d) The
relative density of lead is 11.3. Its density is ....g cm^–3or
. ...kg m^–3.

Discussion

600.	What is the meaning of converging and diverging light rays?
Answer» What is the meaning of converging and diverging light rays?

Discussion

Explore topic-wise InterviewSolutions in .

An open beaker kept on a table started leaking when two holes were made at the same level. This is because

The north pole of a magnet is brought near a metallic ring.The direction of the induced i in the ring

Define time

75.Plot a graph between the voltage and the current for a substance which do not obey Ohm's law.

A particle moves rectilinearly its displacement x at time t is given by x^2 = at^2 + b where a and b are constants its acceleration at time t is proportional to

Which of the following represents the symbol for a series combination of cells?

The distance between a crest and the next trough along the direction of propagation of the wave will be equal to:

ntA ball with charge -50e is placed at the centre of a hollow spherical shell has a net charge of -50e.What is the charge on the shell's outer surface?n nta)-50en ntb)ZEROn ntc)-100en ntd)+100en ntn

What is a thermometer and how does it work. [3 MARKS]

If air is a bad conductor of heat then how our hands become warmer when we place it near a candle

Two wires of same material and length but diameters in the ratio 1:2, are stretched by the same force. The potential energy per unit volume for the two wires will be in the ratio,

A ball is thrown up with a velocity of 10 m/s. The maximum height it reaches is:(Take g=10 m/s2)

Figure shows the word written in front of a plane mirror. Show how the word would appear in the mirror.

In the given figure , find the lateral shift produced by the glass slab.

why KE at triple point is same for liquid gas and solid

During a thunderstorm, the sound of a thunder is heard after the lightning is seen. Why?

By the process of convection the transfer of heat is always in which direction A. Upward B.downward C.sideways D. In all possible direction

In the given figure, two balloons are suspended freely by two light threads. Initially, they are at a distance of 10 cm. When we blow air in the space between the two balloons, the distance between them will be:

A particle execute simple harmonic motion with amplitude a the time period of oscillation is T the time taken by the particle to travel from mid way between mean positions to the extreme position is

(a) Why are the windows of the houses in coastal areas made to face the sea? (b) What is a land breeze? [3 MARKS]

What is a constellation? Name any two constellations.

Question 1(iv)Give an example of a metal which is a poor conductor of heat.

The hog rider in the game "Clash of Clans" at his maximum speed can cover 24m sized square tiles in 5s. And to attain his maximum speed, he takes 6s. What is the magnitude of his acceleration?

Question 2Write an expression for the kinetic energy of an object.

An object ′O′ is placed between two parallel mirrors M1 and M2 as shown in the figure. Find the distance between the 1st image formed by M1 and 3rd image formed by M2.[Assume, the first reflection occurs at M1].

Explain term and how they related to each other --- 1 velocity 2 displacement 3 acceleration

In nuclear power stations, the heat energy released by the reactors is used to generate ____.

Question 23The strips of an electroscope diverge when a charged body is brought in contact with the metal clip. Now the clip is touched gently by our hand. What will happen to the strips? Explain.

two rings have their moment of inertia in the ratio of 2:1 and their diameters in the ratio of 4:1 the ratio of their respective masses

Why the force of friction on a body kept on the tabletop does not depend on the area of contact?

Ehat does internal supply mean in electrolytic cell

Establish the relation for the frequency of vibration for a stretched string of length (l),linear mass density m and tension in the string

Question 24The distance (in km) travelled in h hours at a constant speed of 40 km per hour is ___.

If 2kg ice at -20^° C is mixed with 5kg water at 20^° C . Then find the temperature and compositionof the final mixture.

A body travels 200 cm in the first 2 seconds and 220 cm in the next 5 seconds. Calculate the velocity at the end of the seventh second from the start

the speed of a car was 50 km/hr for the first 900 sec then 40km/hr for the next 50km and then the car decelerated uniformly at 10km/hr sq till it comes to rest. average speed of the car was?

Question 2 (b)Convert the following temperatures to the Kelvin scale.(b)373∘C.

Two metallic wires A and B are connected in series. Wire A has length L and radius r, while B has length 2L and radius 2r. Find the ratio of the total resistance of series combination.

A particle is moving with v= k( y i cap + x jcap) where k is constant.The general equation of the path is

An object is approaching a fixed plane mirror with velocity 5 m/s making an angle of 45∘ with the normal. The speed of image with respect to mirror is

2. A block of mass m is stationary on a horizontal surface. It is connected with a string which has no tension. The coefficient of friction between the block and surface is m. Then, the frictional force between the block and surface is

Which of the following is related to the formation of a solar eclipse?

an athlete completes one round of a circular track of diameter 200m in 40 seconds what will be the distance covered and the displacement at the end of 2 minutes 20 seconds

The type of object that doesn't cast shadow is known as ___ object.

What is the difference between uniform and nonuniform motion?

The air near the source of heat:

What is the meaning of converging and diverging light rays?