16569 + Interview Questions in Physics Page 325 InterviewSolution

16201.	John carried out an experiment to find out how different surfaces (P, Q, R and S) affect the distance a car travelling at 50 km/h needed to stop once the brakes are applied. The results are shown below. Type of road surfacesPQRSStopping distance18151927 Which type of road will provide the most friction for the car to stop ?
Answer» John carried out an experiment to find out how different surfaces (P, Q, R and S) affect the distance a car travelling at 50 km/h needed to stop once the brakes are applied. The results are shown below. $\begin{matrix} T y p e o f r o a d s u r f a c e s & P & Q & R & S S t o p p i n g d i s t a n c e & 18 & 15 & 19 & 27 \end{matrix}$ Which type of road will provide the most friction for the car to stop ?

Discussion

16202.	If an object is placed at the focus of a convex lens, where is the image formed ?
Answer» If an object is placed at the focus of a convex lens, where is the image formed ?

Discussion

16203.	Find out the angle of deviation after reflection, if the incident ray makes 300 with the normal?
Answer» Find out the angle of deviation after reflection, if the incident ray makes 30⁰ with the normal?

Discussion

16204.	Six equal resistance of 1 Ω each are connected to form the sides of a hexagon ABCDEF. Calculate the resistance offered by the combination if the current enters at A and leaves at D.
Answer» Six equal resistance of $1 Ω$ each are connected to form the sides of a hexagon ABCDEF. Calculate the resistance offered by the combination if the current enters at A and leaves at D.

Discussion

16205.	A pair of scissors has its blades 15 cm long, while its handles are 7.5 cm long. What is its mechanical advantage?
Answer» A pair of scissors has its blades 15 cm long, while its handles are 7.5 cm long. What is its mechanical advantage?

Discussion

16206.	Question 29 Explain the phenomenon of dispersion of white light through a glass prism, using suitable ray diagram.
Answer» Question 29 Explain the phenomenon of dispersion of white light through a glass prism, using suitable ray diagram.

Discussion

16207.	A blade, fixed at one end, is made to vibrate by pressing its other end and then releasing it. State one way in which the frequency of vibrations of the blade can be lowered.
Answer» A blade, fixed at one end, is made to vibrate by pressing its other end and then releasing it. State one way in which the frequency of vibrations of the blade can be lowered.

Discussion

16208.	What direction will the left arm experience a force in?
Answer» What direction will the left arm experience a force in?

Discussion

16209.	How come the potential difference changes in resistors in series
Answer» How come the potential difference changes in resistors in series

Discussion

16210.	Which of the following are the advantages of wave energy?
Answer» Which of the following are the advantages of wave energy?

Discussion

16211.	Why do we see rainbow on the other side of the sun?(3 marks)
Answer» Why do we see rainbow on the other side of the sun?(3 marks)

Discussion

16212.	If the radius of the earth were to shrink and its mass were to remain the same, the acceleration due to gravity on the surface of the earth will?
Answer» If the radius of the earth were to shrink and its mass were to remain the same, the acceleration due to gravity on the surface of the earth will?

Discussion

16213.	An antimony ball of volume 15 cm3 is heated to 210 ∘C which caused the volume to become 15.045 cm3, if γ for antimony is 15×10−6 ∘C−1, what is the initial temperature of the ball?10
Answer» An antimony ball of volume $15 {cm}^{3}$ is heated to $210^{\circ} C$ which caused the volume to become $15.045 {cm}^{3}$ , if $γ$ for antimony is $15 \times 10^{- 6}^{\circ} C^{- 1}$ , what is the initial temperature of the ball? 10

Discussion

16214.	Conductors have .......... free electrons. __
Answer» Conductors have .......... free electrons. __

Discussion

16215.	(a) What are the advantages of nuclear energy ? (b) State the disadvantages of nuclear energy.
Answer» (a) What are the advantages of nuclear energy ? (b) State the disadvantages of nuclear energy.

Discussion

16216.	Which of the following fuels has the highest calorific value? (a) natural gas (b) methane gas (c) hydrogen gas (d) biogas
Answer» Which of the following fuels has the highest calorific value? (a) natural gas (b) methane gas (c) hydrogen gas (d) biogas

Discussion

16217.	Choose the correct statement :
Answer» Choose the correct statement :

Discussion

16218.	"The calorific value of cooking gas (LPG) is 50 kJ/g". What does it mean?
Answer» "The calorific value of cooking gas (LPG) is 50 kJ/g". What does it mean?

Discussion

16219.	A uniform meter rule balances horizontally on a knife-edge placed at the 58 cm mark when a weight of 20 gf is suspended from one end. (i) Draw a diagram of the arrangement. (ii) What is the weight of the rule?
Answer» A uniform meter rule balances horizontally on a knife-edge placed at the 58 cm mark when a weight of 20 gf is suspended from one end. (i) Draw a diagram of the arrangement. (ii) What is the weight of the rule?

16219.

A uniform meter rule balances horizontally on a knife-edge placed at the 58 cm mark when a weight of 20 gf is suspended from one end. (i) Draw a diagram of the arrangement. (ii) What is the weight of the rule?

Answer»

A uniform meter rule balances horizontally on a knife-edge placed at the 58 cm mark when a weight of 20 gf is suspended from one end.

(i) Draw a diagram of the arrangement.

(ii) What is the weight of the rule?

Discussion

16220.	In what unit does the electric meter in a house measure the electrical energy consumed? What is its value in S.I unit?
Answer» In what unit does the electric meter in a house measure the electrical energy consumed? What is its value in S.I unit?

16220.

In what unit does the electric meter in a house measure the electrical energy consumed? What is its value in S.I unit?

Answer»

In what unit does the electric meter in a house measure the electrical energy consumed? What is its value in S.I unit?

Discussion

16221.	The credit for the discovery of chlorine goes to :
Answer» The credit for the discovery of chlorine goes to :

Discussion

16222.	Rafeeq goes to trekking, and finds a cave. He shouts into it, and hears his echo after 4.5 s. How long is the cave in km? Take the speed of sound in the air to be 340 m s−1.0.765
Answer» Rafeeq goes to trekking, and finds a cave. He shouts into it, and hears his echo after $4.5 s$ . How long is the cave in $km$ ? Take the speed of sound in the air to be $340 m s^{- 1}$ . 0.765

Discussion

16223.	Refraction is the phenomena of :
Answer» Refraction is the phenomena of :

Discussion

16224.	Which of the following type of motion repeats itself after equal intervals of time?
Answer» Which of the following type of motion repeats itself after equal intervals of time?

Discussion

16225.	Name the part of a biogas plant where reactions take place in the absence of oxygen.
Answer» Name the part of a biogas plant where reactions take place in the absence of oxygen.

Discussion

16226.	In Fleming's left-hand rule, What does the thumb, forefinger and middle finger denotes respectively?
Answer» In Fleming's left-hand rule, What does the thumb, forefinger and middle finger denotes respectively?

Discussion

16227.	In a uniform linear motion, ___
Answer» In a uniform linear motion, ___

Discussion

16228.	What is renewable source of energy? Give examples. [2 MARKS]
Answer» What is renewable source of energy? Give examples. [2 MARKS]

Discussion

16229.	A concave lens has a focal length of 15 cm. At what distance should the object be from the lens placed so that it forms an image 10 cm from the lens? Also find the magnification. [3 MARKS]
Answer» A concave lens has a focal length of 15 cm. At what distance should the object be from the lens placed so that it forms an image 10 cm from the lens? Also find the magnification. [3 MARKS]

Discussion

16230.	Define 1 dioptre power of a lens.
Answer» Define 1 dioptre power of a lens.

Discussion

16231.	The rating of a fuse connected in the lighting circuit is : (a) 15 A (b) 5 A (c) 10 A (d) zero.
Answer» The rating of a fuse connected in the lighting circuit is : (a) 15 A (b) 5 A (c) 10 A (d) zero.

16231.

The rating of a fuse connected in the lighting circuit is : (a) 15 A (b) 5 A (c) 10 A (d) zero.

Answer»

The rating of a fuse connected in the lighting circuit is :

(a) 15 A

(b) 5 A

(c) 10 A

(d) zero.

Discussion

16232.	Which of the below-mentioned sets consist of solid objects?
Answer» Which of the below-mentioned sets consist of solid objects?

Discussion

16233.	Which of the following is not true for an electromagnet and permanent magnet
Answer» Which of the following is not true for an electromagnet and permanent magnet

Discussion

16234.	Suppose a pivot rod is rotating at a constant velocity. Is it in rotational equilibrium? Pls explain. Thanks.
Answer» Suppose a pivot rod is rotating at a constant velocity. Is it in rotational equilibrium? Pls explain. Thanks.

Discussion

16235.	The thickest pin corresponds to ___ pin.
Answer» The thickest pin corresponds to ___ pin.

Discussion

16236.	Why is current constant for resistors connected in series and voltage constant for resistors connected in parallel?
Answer» Why is current constant for resistors connected in series and voltage constant for resistors connected in parallel?

Discussion

16237.	In a experiment with a rectangular glass slab , that a ray of light incident at an angle 60° with normal on one face of the glass slab , after refraction , strikes the opposite face of the glass slab before emerging out in a air making angle of 42° with the normal . What value assign to the angle of refraction and angle of emergence?
Answer» In a experiment with a rectangular glass slab , that a ray of light incident at an angle 60° with normal on one face of the glass slab , after refraction , strikes the opposite face of the glass slab before emerging out in a air making angle of 42° with the normal . What value assign to the angle of refraction and angle of emergence?

Discussion

16238.	Is zero resistance possible ? EXPLAIN .
Answer» Is zero resistance possible ? EXPLAIN .

16238.

Is zero resistance possible ? EXPLAIN .

Answer»

Is zero resistance possible ?

EXPLAIN .

Discussion

16239.	Is magnet obey inverse square law? Why? And How?
Answer» Is magnet obey inverse square law? Why? And How?

Discussion

16240.	Write any two point difference between overloading and short circuiting.
Answer» Write any two point difference between overloading and short circuiting.

Discussion

16241.	Mention the kind of lens that can form 1) virutal, errect and magnified image 2)real, inverted and diminished image 3) virutal,errect and diminished image.
Answer» Mention the kind of lens that can form 1) virutal, errect and magnified image 2)real, inverted and diminished image 3) virutal,errect and diminished image.

Discussion

16242.	Choose the odd one out for ideal gas.
Answer» Choose the odd one out for ideal gas.

16242.

Choose the odd one out for ideal gas.

Answer»

Choose the odd one out for ideal gas.

Discussion

16243.	Why are clouds white in colour?
Answer» Why are clouds white in colour?

Discussion

16244.	The north pole of earth's magnet is in the : (a) geographical south (b) geographical east (c) geographical west (d) geographical north
Answer» The north pole of earth's magnet is in the : (a) geographical south (b) geographical east (c) geographical west (d) geographical north

16244.

The north pole of earth's magnet is in the : (a) geographical south (b) geographical east (c) geographical west (d) geographical north

Answer»

The north pole of earth's magnet is in the :

(a) geographical south

(b) geographical east

(c) geographical west

(d) geographical north

Discussion

16245.	Raj is standing in front of a plane mirror. The distance between Raj and his image is 100cm. If the distance between the mirror and image is x. What could be the possible value of x?
Answer» Raj is standing in front of a plane mirror. The distance between Raj and his image is 100cm. If the distance between the mirror and image is x. What could be the possible value of x?

Discussion

16246.	Which of the following is NOT a property of magnetic field lines?
Answer» Which of the following is NOT a property of magnetic field lines?

Discussion

16247.	If AB is the object and CD is the image formed. If AP is the object distance and CP is the image distance from the mirror. Then choose the correct sign convention? 1. height of image=+ ve2. height of image=−ve3. height of object=+ve4. height of object=−ve5. AP=+ve6. AP=−ve7. PC=+ve8. PC=−ve
Answer» If AB is the object and CD is the image formed. If AP is the object distance and CP is the image distance from the mirror. Then choose the correct sign convention? $\begin{matrix} 1. & h e i g h t o f i m a g e = + v e & 2. & h e i g h t o f i m a g e = - v e 3. & h e i g h t o f o b j e c t = + v e & 4. & h e i g h t o f o b j e c t = - v e 5. & A P = + v e & 6. & A P = - v e 7. & P C = + v e & 8. & P C = - v e \end{matrix}$

Discussion

16248.	A boy is standing in front of and close to a special mirror. He finds the image of his head bigger than normal, the middle part of his body of the same size, and his legs smaller than normal. The special mirror is made up of three types of mirrors in the following order from top downwards : (a) Convex, Plane, Concave (b) Plane, Convex, Concave (c) Concave, Plane, Convex (d) Convex, Concave, Plane
Answer» A boy is standing in front of and close to a special mirror. He finds the image of his head bigger than normal, the middle part of his body of the same size, and his legs smaller than normal. The special mirror is made up of three types of mirrors in the following order from top downwards : (a) Convex, Plane, Concave (b) Plane, Convex, Concave (c) Concave, Plane, Convex (d) Convex, Concave, Plane

Discussion

16249.	Explain Scattering of light.
Answer» Explain Scattering of light.

Discussion

16250.	The potential at points a, b and c is 30V, 20V and 10V.The values of i1 and i2 are-
Answer» The potential at points a, b and c is 30V, 20V and 10V.The values of i $_{1}$ and i $_{2}$ are-

16250.

The potential at points a, b and c is 30V, 20V and 10V.The values of i1 and i2 are-

Answer»

The potential at points a, b and c is 30V, 20V and 10V.The values of i $_{1}$ and i $_{2}$ are-

Discussion

Explore topic-wise InterviewSolutions in .

If an object is placed at the focus of a convex lens, where is the image formed ?

Find out the angle of deviation after reflection, if the incident ray makes 300 with the normal?

Six equal resistance of 1 Ω each are connected to form the sides of a hexagon ABCDEF. Calculate the resistance offered by the combination if the current enters at A and leaves at D.

A pair of scissors has its blades 15 cm long, while its handles are 7.5 cm long. What is its mechanical advantage?

Question 29 Explain the phenomenon of dispersion of white light through a glass prism, using suitable ray diagram.

A blade, fixed at one end, is made to vibrate by pressing its other end and then releasing it. State one way in which the frequency of vibrations of the blade can be lowered.

What direction will the left arm experience a force in?

How come the potential difference changes in resistors in series

Which of the following are the advantages of wave energy?

Why do we see rainbow on the other side of the sun?(3 marks)

If the radius of the earth were to shrink and its mass were to remain the same, the acceleration due to gravity on the surface of the earth will?

An antimony ball of volume 15 cm3 is heated to 210 ∘C which caused the volume to become 15.045 cm3, if γ for antimony is 15×10−6 ∘C−1, what is the initial temperature of the ball?10

Conductors have .......... free electrons. __

(a) What are the advantages of nuclear energy ? (b) State the disadvantages of nuclear energy.

Which of the following fuels has the highest calorific value? (a) natural gas (b) methane gas (c) hydrogen gas (d) biogas

Choose the correct statement :

"The calorific value of cooking gas (LPG) is 50 kJ/g". What does it mean?

A uniform meter rule balances horizontally on a knife-edge placed at the 58 cm mark when a weight of 20 gf is suspended from one end. (i) Draw a diagram of the arrangement. (ii) What is the weight of the rule?

In what unit does the electric meter in a house measure the electrical energy consumed? What is its value in S.I unit?

The credit for the discovery of chlorine goes to :

Rafeeq goes to trekking, and finds a cave. He shouts into it, and hears his echo after 4.5 s. How long is the cave in km? Take the speed of sound in the air to be 340 m s−1.0.765

Refraction is the phenomena of :

Which of the following type of motion repeats itself after equal intervals of time?

Name the part of a biogas plant where reactions take place in the absence of oxygen.

In Fleming's left-hand rule, What does the thumb, forefinger and middle finger denotes respectively?

In a uniform linear motion, ___

What is renewable source of energy? Give examples. [2 MARKS]

A concave lens has a focal length of 15 cm. At what distance should the object be from the lens placed so that it forms an image 10 cm from the lens? Also find the magnification. [3 MARKS]

Define 1 dioptre power of a lens.

The rating of a fuse connected in the lighting circuit is : (a) 15 A (b) 5 A (c) 10 A (d) zero.

Which of the below-mentioned sets consist of solid objects?

Which of the following is not true for an electromagnet and permanent magnet

Suppose a pivot rod is rotating at a constant velocity. Is it in rotational equilibrium? Pls explain. Thanks.

The thickest pin corresponds to ___ pin.

Why is current constant for resistors connected in series and voltage constant for resistors connected in parallel?

Is zero resistance possible ? EXPLAIN .

Is magnet obey inverse square law? Why? And How?

Write any two point difference between overloading and short circuiting.

Mention the kind of lens that can form 1) virutal, errect and magnified image 2)real, inverted and diminished image 3) virutal,errect and diminished image.

Choose the odd one out for ideal gas.

Why are clouds white in colour?

The north pole of earth's magnet is in the : (a) geographical south (b) geographical east (c) geographical west (d) geographical north

Raj is standing in front of a plane mirror. The distance between Raj and his image is 100cm. If the distance between the mirror and image is x. What could be the possible value of x?

Which of the following is NOT a property of magnetic field lines?

If AB is the object and CD is the image formed. If AP is the object distance and CP is the image distance from the mirror. Then choose the correct sign convention? 1. height of image=+ ve2. height of image=−ve3. height of object=+ve4. height of object=−ve5. AP=+ve6. AP=−ve7. PC=+ve8. PC=−ve

Explain Scattering of light.

The potential at points a, b and c is 30V, 20V and 10V.The values of i1 and i2 are-