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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.
| 801. |
A ray of light parallel to the principal axis of a concave mirror, after reflection, passes through: |
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Answer» A ray of light parallel to the principal axis of a concave mirror, after reflection, passes through: |
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| 802. |
One end of a nylon rope of length 4.5 m and diameter 6 mm is fixed to a tree-limb. A monkey weighing 100 N jumps to catch the free end and stays there. Find the elongation of the rope and the corresponding change in the diameter. Young modulus of nylon = 4.8 x 1011 N m-2 and Poisson ratio of nylon = 0.2. |
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Answer» One end of a nylon rope of length 4.5 m and diameter 6 mm is fixed to a tree-limb. A monkey weighing 100 N jumps to catch the free end and stays there. Find the elongation of the rope and the corresponding change in the diameter. Young modulus of nylon = 4.8 x 1011 N m-2 and Poisson ratio of nylon = 0.2. |
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| 803. |
Consider the following statements: Statement 1: Friction is caused by the interlocking of irregularities in the two surfaces. Statement 2: The force of friction will increase if the two surfaces are pressed hard against each other. Choose the correct option: |
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Answer» Consider the following statements: |
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| 804. |
Willy-willy is:- |
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Answer» Willy-willy is:- |
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| 805. |
The displacement of a particle is represented by the following equation s = 3t3 + 7t2 + 5t + 8 where s is in metres t in seconds. The acceleration of the particle at t = 1 s is |
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Answer» The displacement of a particle is represented by the following equation s = 3t3 + 7t2 + 5t + 8 where s is in metres t in seconds. The acceleration of the particle at t = 1 s is |
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| 806. |
Our body exchanges ___________ with the surroundings. |
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Answer» Our body exchanges ___________ with the surroundings. |
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| 807. |
one mole of non idealgas undergoes a change of state(2.0atm,3.0L,95K) to (4.0atm,5.0L,245K) with a change in internal energy △ U=30.0 Latm .The change inenthalpy of the process in latm? |
| Answer» one mole of non idealgas undergoes a change of state(2.0atm,3.0L,95K) to (4.0atm,5.0L,245K) with a change in internal energy △ U=30.0 Latm .The change inenthalpy of the process in latm? | |
| 808. |
The displacement of a particle is given by x(t) = (t-2)^2 where x Is in meters and t is in secs the distance covered by the particle In first 4sec is |
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Answer» The displacement of a particle is given by x(t) = (t-2)^2 where x Is in meters and t is in secs the distance covered by the particle In first 4sec is |
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| 809. |
State the energy changes that occur while charging and discharging the mobile battery. |
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Answer» State the energy changes that occur while charging and discharging the mobile battery. |
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| 810. |
How many images will be formed if an object is placed between two mirrors kept perpendicular to each other? |
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Answer» How many images will be formed if an object is placed between two mirrors kept perpendicular to each other? |
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| 811. |
Does a bar magnet has only two poles or many poles are possible? |
| Answer» Does a bar magnet has only two poles or many poles are possible? | |
| 812. |
The kinetic energy acquired by a body of mass `m’ when potential energy decreases. |
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Answer» The kinetic energy acquired by a body of mass `m’ when potential energy decreases. |
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| 813. |
The focus of mirror changes with colour of light. But 2F=R and I dont think radius of mirror can change |
| Answer» The focus of mirror changes with colour of light. But 2F=R and I dont think radius of mirror can change | |
| 814. |
A lens is thicker in the middle than at the edges. Can it be used to burn a piece of paper by using sunlight? |
| Answer» A lens is thicker in the middle than at the edges. Can it be used to burn a piece of paper by using sunlight? | |
| 815. |
The magnitude of magnetic field at a perpendicular distance of 8 em from an infinitely long straight conductor carrying current of 8 A is:-(A) 2 x 10^-5 T (B) 10^-5 T(C) 3 X 10^-5 T(D) 5 x 10^-5 T |
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Answer» The magnitude of magnetic field at a perpendicular distance of 8 em from an infinitely long straight conductor carrying current of 8 A is:- (A) 2 x 10^-5 T (B) 10^-5 T (C) 3 X 10^-5 T (D) 5 x 10^-5 T |
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| 816. |
An ________________ is the path through which the electric current passes. |
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Answer» An ________________ is the path through which the electric current passes. |
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| 817. |
What will happen if you touch the disc of the electroscope when its leaves are spread out? |
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Answer» What will happen if you touch the disc of the electroscope when its leaves are spread out? |
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| 818. |
Wool is a bad conductor of heat. But this cannot explain why wool keeps us so warm. What other factor contributes to this? |
| Answer» Wool is a bad conductor of heat. But this cannot explain why wool keeps us so warm. What other factor contributes to this? | |
| 819. |
Dear sir or madam , My most hard doubt question is :- How gasses in the universe are formed at first , for example hydrogen , nitrogen, etc, . |
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Answer» Dear sir or madam , My most hard doubt question is :- How gasses in the universe are formed at first , for example hydrogen , nitrogen, etc, . |
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| 820. |
A material which allows heat to pass through it easily is known as ______________. |
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Answer» A material which allows heat to pass through it easily is known as ______________. |
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| 821. |
a particle is executing shm with time period T starting from mean position time taken by it to complete 5/8 oscillations i |
| Answer» a particle is executing shm with time period T starting from mean position time taken by it to complete 5/8 oscillations i | |
| 822. |
Question 20In following figure, the point identified by the coordinates ( -5 , 3 ) isA) TB) RC) LD) S |
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Answer» Question 20 In following figure, the point identified by the coordinates ( -5 , 3 ) is  A) T B) R C) L D) S |
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| 823. |
23.friction does act to move Car ? |
| Answer» 23.friction does act to move Car ? | |
| 824. |
Who invented thermometer and which year? |
| Answer» Who invented thermometer and which year? | |
| 825. |
Find the final position of the image of the object O from the mirror m1 after three successive reflections taking first reflection on m1. |
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Answer» Find the final position of the image of the object O from the mirror m1 after three successive reflections taking first reflection on m1. |
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| 826. |
13. Why is distance upon displacement greater than 1 |
| Answer» 13. Why is distance upon displacement greater than 1 | |
| 827. |
How does magnetic field is developed inside magnet from north to south pole? |
| Answer» How does magnetic field is developed inside magnet from north to south pole? | |
| 828. |
Give reasons. (a) What is an excellent coolant. (b) Mercury is used in a thermometer. (c) A bimetallic strip is used in electrical gadgets. (d) An iron tyre is heated before fitting it on a wheel. |
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Answer» Give reasons. (a) What is an excellent coolant. (b) Mercury is used in a thermometer. (c) A bimetallic strip is used in electrical gadgets. (d) An iron tyre is heated before fitting it on a wheel. |
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| 829. |
37. Two point charges 3*10power—8C and -2*10power—8C are located 15 CM apart in air. Find at what points on the line joining these charges the electric potential is zero. (Take potential at infinity to be zero. ) |
| Answer» 37. Two point charges 3*10power—8C and -2*10power—8C are located 15 CM apart in air. Find at what points on the line joining these charges the electric potential is zero. (Take potential at infinity to be zero. ) | |
| 830. |
During lightning, a huge amount of current flows. Which of the following happens alongside this phenomena? |
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Answer» During lightning, a huge amount of current flows. Which of the following happens alongside this phenomena? |
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| 831. |
Which mirror is used for reflecting type of telescope why |
| Answer» Which mirror is used for reflecting type of telescope why | |
| 832. |
a force of 20 newton is acting on a body of masss 4 kg in the x-y plane . the direction of force of cos^-1 (3/5) with x axis. what is the component of acceleration along y axis? |
| Answer» a force of 20 newton is acting on a body of masss 4 kg in the x-y plane . the direction of force of cos^-1 (3/5) with x axis. what is the component of acceleration along y axis? | |
| 833. |
According to the passage, the drought at the time of Maya collapse had a different impact compared to the droughts earlier because: |
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Answer» According to the passage, the drought at the time of Maya collapse had a different impact compared to the droughts earlier because: |
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| 834. |
28.A police inspector in a jeep is chasing a pick pocket in a straight road.The jeep is going at its maximum speed V (asumed uniform). the pickpocket rights on the motor cycle of a waiting friend when the Jeep is at a distance D away, and the motorcycle start with a constant acceleration A .show that the pick packet will be caught if v>=2AD |
| Answer» 28.A police inspector in a jeep is chasing a pick pocket in a straight road.The jeep is going at its maximum speed V (asumed uniform). the pickpocket rights on the motor cycle of a waiting friend when the Jeep is at a distance D away, and the motorcycle start with a constant acceleration A .show that the pick packet will be caught if v>=2AD | |
| 835. |
if a body moves towards a mirror at a speed of 12 m/s then what will be the speed of image of yhe bodywith respect to the body |
| Answer» if a body moves towards a mirror at a speed of 12 m/s then what will be the speed of image of yhe bodywith respect to the body | |
| 836. |
1. Why angle of reflection is equal to angle of incident always ? |
| Answer» 1. Why angle of reflection is equal to angle of incident always ? | |
| 837. |
(a) What do you understand by the term "transformation of energy"? Explain with an example.(b) Explain the transformation of energy in the following cases:(i) A ball is thrown upwards.(ii) A stone dropped from the roof of a building. |
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Answer» (a) What do you understand by the term "transformation of energy"? Explain with an example. (b) Explain the transformation of energy in the following cases: (i) A ball is thrown upwards. (ii) A stone dropped from the roof of a building. |
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| 838. |
36. (1712)power -1 =17 power -1 ____ |
| Answer» 36. (1712)power -1 =17 power -1 ____ | |
| 839. |
Question 23How does the weight of an object vary with respect to mass and radius of the earth. In a hypothetical case, if the diameter of the earth becomes half of its present value and its mass becomes four times of its present value, then how would the weight of any object on the surface of the earth be affected? |
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Answer» Question 23 How does the weight of an object vary with respect to mass and radius of the earth. In a hypothetical case, if the diameter of the earth becomes half of its present value and its mass becomes four times of its present value, then how would the weight of any object on the surface of the earth be affected? |
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| 840. |
14.4 moles of O3 gas dissociates 75% into O3 and 25% into O AT temp T .the change in internal energy is |
| Answer» 14.4 moles of O3 gas dissociates 75% into O3 and 25% into O AT temp T .the change in internal energy is | |
| 841. |
Question 8The speed-time graph for a car is shown in below figure:(a) Find how far does the car travel in the first 4 seconds. Shade the area on the graph that represents the distance travelled by the car during the period.(b) Which part of the graph represents uniform motion of the car? |
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Answer» Question 8 The speed-time graph for a car is shown in below figure:  (a) Find how far does the car travel in the first 4 seconds. Shade the area on the graph that represents the distance travelled by the car during the period. (b) Which part of the graph represents uniform motion of the car? |
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| 842. |
112. A man has to go 50 m due north, 40 m due east and 20 m due south to reach a field. (a) What distance he has to walk to reach the field? (b) What is his displacement from his house |
| Answer» 112. A man has to go 50 m due north, 40 m due east and 20 m due south to reach a field. (a) What distance he has to walk to reach the field? (b) What is his displacement from his house | |
| 843. |
140.The kinetic energy of a particle depends on the square of speed of the particale . If error in measurment of speed in 30% the error in the measerment of kinetic energy will be |
| Answer» 140.The kinetic energy of a particle depends on the square of speed of the particale . If error in measurment of speed in 30% the error in the measerment of kinetic energy will be | |
| 844. |
Which of the following modes of heat transfer does not require any particle for transfer of heat energy? |
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Answer» Which of the following modes of heat transfer does not require any particle for transfer of heat energy? |
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| 845. |
The cost of painting the total outside surface of a closed cylinder at ₹ 3 per cm2 is ₹ 2772. If the height of the cylinder is 2 times the radius, then its volume is __________. |
| Answer» The cost of painting the total outside surface of a closed cylinder at ₹ 3 per cm2 is ₹ 2772. If the height of the cylinder is 2 times the radius, then its volume is __________. | |
| 846. |
A string is used to pull a block of mass m vertically up by a distance h at a constant acceleration g/3The work done by the tension in the string is-(1) 2/3mg h(2)-mgh/3(4)4/3mgh(3) mgh |
| Answer» A string is used to pull a block of mass m vertically up by a distance h at a constant acceleration g/3The work done by the tension in the string is-(1) 2/3mg h(2)-mgh/3(4)4/3mgh(3) mgh | |
| 847. |
Question 65(ii)The following is the time-distance graph of Sneha's walking.Find her average speed in km/h. |
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Answer» Question 65(ii) The following is the time-distance graph of Sneha's walking.  Find her average speed in km/h. |
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| 848. |
if radius of spherical ball is measured as ⊂5.2+0.2⊃ cm then percentage error in the calculation of volume of ball is |
| Answer» if radius of spherical ball is measured as ⊂5.2+0.2⊃ cm then percentage error in the calculation of volume of ball is | |
| 849. |
The rear view mirror of a car is a plane mirror. A driver is reversing his car at a speed of 4 m per second. The driver sees, in his rear view mirror, the image of a scooter parked behind his car. The speed, at which its image appears to approach the driver, will be what among the following options- a) 2 metre per second b) 4 metre per second c) 8 metre per second d) 16 metre per second |
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Answer» The rear view mirror of a car is a plane mirror. A driver is reversing his car at a speed of 4 m per second. The driver sees, in his rear view mirror, the image of a scooter parked behind his car. The speed, at which its image appears to approach the driver, will be what among the following options- |
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| 850. |
Question 1Name a device that helps to maintain a potential difference across a conductor. |
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Answer» Question 1 Name a device that helps to maintain a potential difference across a conductor. |
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