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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.
| 4801. |
Which is these is the biggest unit of time? |
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Answer» Which is these is the biggest unit of time? |
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| 4802. |
What is an electromagnet? Draw a circuit diagram to show how a soft iron piece can be transformed into an electromagnet. |
| Answer» What is an electromagnet? Draw a circuit diagram to show how a soft iron piece can be transformed into an electromagnet. | |
| 4803. |
Three charges of equal magnitude q are placed at the vertices of an equilateral triangle of side l. Find net force on any one charge ? |
| Answer» Three charges of equal magnitude q are placed at the vertices of an equilateral triangle of side l. Find net force on any one charge ? | |
| 4804. |
An external combustion engine has a power of 12kW. The speed at which it raises a mass of 120kg is: a) 1m/s b) 10m/s c) 120m/s d) 1440m/s (Sorry, for selecting wrong chapter as this question is of class 9th) |
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Answer» An external combustion engine has a power of 12kW. The speed at which it raises a mass of 120kg is: a) 1m/s b) 10m/s c) 120m/s d) 1440m/s (Sorry, for selecting wrong chapter as this question is of class 9th) |
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| 4805. |
(i) An electric bell is suspended by thin wires in a glass vessel and set ringing. Describe and explain what happens if the air is gradually pumped out of the glass vessel.(ii) Why cannot a sound be heard on the moon? How do astronauts talk to one another on the surface of moon? |
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Answer» (i) An electric bell is suspended by thin wires in a glass vessel and set ringing. Describe and explain what happens if the air is gradually pumped out of the glass vessel. (ii) Why cannot a sound be heard on the moon? How do astronauts talk to one another on the surface of moon? |
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| 4806. |
The resistance offered by a liquid to its flow is called |
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Answer» The resistance offered by a liquid to its flow is called |
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| 4807. |
117.A small fish 4 m below the surface of a lake is viewed through a simple thin converging lens of focal length 30 m. If the lens is 2 m above the water surface image of the fish as seen by the observer is at (u air- 1, u water=1.33) a) 6 m below water surface b) 4m below water surface c) 5m below water surface c) 3m below water surface |
| Answer» 117.A small fish 4 m below the surface of a lake is viewed through a simple thin converging lens of focal length 30 m. If the lens is 2 m above the water surface image of the fish as seen by the observer is at (u air- 1, u water=1.33) a) 6 m below water surface b) 4m below water surface c) 5m below water surface c) 3m below water surface | |
| 4808. |
Why is the speed of a non mechanical wave always constant? |
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Answer» Why is the speed of a non mechanical wave always constant? |
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| 4809. |
A particle moves in x-y plane with a velocityV 2y i +4j. Equation of the path followed bythe particle is(1) x y(2) y = VX(3) 4x y2(4) 4y x2 |
| Answer» A particle moves in x-y plane with a velocityV 2y i +4j. Equation of the path followed bythe particle is(1) x y(2) y = VX(3) 4x y2(4) 4y x2 | |
| 4810. |
The orbital speed of a satellite revolving around aplanet in a circular orbit is v If its speed isincreased by 10%, then(1) It will escape from its orbit(2) It will start rotating in an elliptical orbit(3) It will continue to move in the same orbit(4) It will move in a circular orbit of radius 20%more than radius of initial orbit |
| Answer» The orbital speed of a satellite revolving around aplanet in a circular orbit is v If its speed isincreased by 10%, then(1) It will escape from its orbit(2) It will start rotating in an elliptical orbit(3) It will continue to move in the same orbit(4) It will move in a circular orbit of radius 20%more than radius of initial orbit | |
| 4811. |
31.Figure shows the graph of velocity versus time for a particle going along x axis. Initially at t=0, particle is at x=3m. Find position of particle at t=2 s (in m) 1. 8m 2. 9m 3. 10m 4. 11m |
| Answer» 31.Figure shows the graph of velocity versus time for a particle going along x axis. Initially at t=0, particle is at x=3m. Find position of particle at t=2 s (in m) 1. 8m 2. 9m 3. 10m 4. 11m | |
| 4812. |
44. The rotation of the earth having radius R about its axis speeds up to a value such that a man at latitude angle 60 degree feels weightlessness.The duration of the day in such a case is ? |
| Answer» 44. The rotation of the earth having radius R about its axis speeds up to a value such that a man at latitude angle 60 degree feels weightlessness.The duration of the day in such a case is ? | |
| 4813. |
The charge an electron is 1.6 X 10 power minus 19 coulomb. find the number of electrons that will flow per second to constitute a current of 2A |
| Answer» The charge an electron is 1.6 X 10 power minus 19 coulomb. find the number of electrons that will flow per second to constitute a current of 2A | |
| 4814. |
A body travels 200cm in the first two seconds and 220cm in the next 4 sec with same acceleration. The velocity of the body at the end of the 7th second is |
| Answer» A body travels 200cm in the first two seconds and 220cm in the next 4 sec with same acceleration. The velocity of the body at the end of the 7th second is | |
| 4815. |
What is the speed of sound : (a) in air ? (b) in water ? (c) in iron ? |
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Answer» What is the speed of sound : (a) in air ? (b) in water ? (c) in iron ? |
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| 4816. |
In the following figure, a body starts from G, and reaches D via A, B and C.Calculate the ratio of the total distance travelled to the total displacement of the body if the curves GA and BC have the same radius, and all the lengths given are in feet. |
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Answer» In the following figure, a body starts from G, and reaches D via A, B and C. |
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| 4817. |
How do the following factors affect, if at all, the speed of sound in air : (i) the frequency of sound, (ii) the temperature of the air, (iii) the pressure of air, (iv) moisture in the air? |
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Answer» How do the following factors affect, if at all, the speed of sound in air : (i) the frequency of sound, (ii) the temperature of the air, (iii) the pressure of air, (iv) moisture in the air? |
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| 4818. |
19. In the figure given below what is the reading of the balance |
| Answer» 19. In the figure given below what is the reading of the balance | |
| 4819. |
(c) A greater force is required to im part greater velocity to an object. explain |
| Answer» (c) A greater force is required to im part greater velocity to an object. explain | |
| 4820. |
A man carries a load on his load on his head through a distance of 5m. The maximum amount of work is done when he: (Package Q4, Pg 58, Work,Energy Power) |
| Answer» A man carries a load on his load on his head through a distance of 5m. The maximum amount of work is done when he: (Package Q4, Pg 58, Work,Energy Power) | |
| 4821. |
by cross product, direction of torque is perpendicular to the plane containing F and R but in rotation we consider it either clokwise or anticlockwise |
| Answer» by cross product, direction of torque is perpendicular to the plane containing F and R but in rotation we consider it either clokwise or anticlockwise | |
| 4822. |
Why do people believe in big bang theory? And why it is stated the Most correct among all of other theories |
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Answer» Why do people believe in big bang theory? And why it is stated the Most correct among all of other theories |
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| 4823. |
Mercury thermometers are increasingly being replaced by digital, which of the following is a reason for this? |
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Answer» Mercury thermometers are increasingly being replaced by digital, which of the following is a reason for this? |
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| 4824. |
{ Two blocks of masses }m each are hung from a balance as shown in the }}{ figure. The scale pan }A is at height }H_1 whereas scale pan }B is at height be }}{ Ha. Net torque of weights acting on the system about point }C , will be }}{ (length of the rod is }\ell and }H_1&H_2 are } |
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Answer» { Two blocks of masses }m each are hung from a balance as shown in the }}{ figure. The scale pan }A is at height }H_1 whereas scale pan }B is at height be }}{ Ha. Net torque of weights acting on the system about point }C , will be }}{ (length of the rod is }\ell and }H_1&H_2 are }< |
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| 4825. |
While measuring the length of a small rod using a vernier callipers, the difference between the observed length and the true length turned out to be 0.4 mm. When the jaws are made to touch each other, the 3rd division on the vernier scale coincides with a division on the main scale, then the least count of the callipers is: |
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Answer» While measuring the length of a small rod using a vernier callipers, the difference between the observed length and the true length turned out to be 0.4 mm. When the jaws are made to touch each other, the 3rd division on the vernier scale coincides with a division on the main scale, then the least count of the callipers is: |
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| 4826. |
Define:(i) Work(ii) Energy(iii) PowerGive their SI units. |
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Answer» Define: (i) Work (ii) Energy (iii) Power Give their SI units. |
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| 4827. |
Non stick cooking utensils are 'non-sticky' because of the reason that they are coated with |
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Answer» Non stick cooking utensils are 'non-sticky' because of the reason that they are coated with |
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| 4828. |
An object is projected vertically upward with speed \surd gR ,where R is radius of earth and g is accleration due to gravity on surface of earth .find the maximum height attained by it |
| Answer» An object is projected vertically upward with speed \surd gR ,where R is radius of earth and g is accleration due to gravity on surface of earth .find the maximum height attained by it | |
| 4829. |
The mass per unit length (λ) of a non-uniform rod of length L varies linearly with distance x from its one end according to the relation : λ = α x, where α is a constant. The distance of centre of mass from the same end is :- (1)L/3(2)2L/3(3)L/4(4)4L |
| Answer» The mass per unit length (λ) of a non-uniform rod of length L varies linearly with distance x from its one end according to the relation : λ = α x, where α is a constant. The distance of centre of mass from the same end is :- (1)L/3(2)2L/3(3)L/4(4)4L | |
| 4830. |
What is meant by Salt brines and Geothermal Vents |
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Answer» What is meant by Salt brines and Geothermal Vents |
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| 4831. |
'मैं अब पुस्तकों के भीतर था।' नीचे दिए गए विकल्पों में से कौन सा इस वाक्य का अर्थ बतलाता है -(क) लेखक पुस्तकें पढ़ने में रम गया।(ख) लेखक पुस्तकों की शैल्फ़ के भीतर चला गया।(ग) लेखक के चारों ओर पुस्तकें ही थीं।(घ) पुस्तक में लेखक का परिचय और चित्र छपा था। |
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Answer» 'मैं अब पुस्तकों के भीतर था।' नीचे दिए गए विकल्पों में से कौन सा इस वाक्य का अर्थ बतलाता है - (क) लेखक पुस्तकें पढ़ने में रम गया। (ख) लेखक पुस्तकों की शैल्फ़ के भीतर चला गया। (ग) लेखक के चारों ओर पुस्तकें ही थीं। (घ) पुस्तक में लेखक का परिचय और चित्र छपा था। |
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| 4832. |
If a charge of 750 C flows through the cross-section of a conducting wire in 5 minutes, what is the value of the current that flows through the wire? |
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Answer» If a charge of 750 C flows through the cross-section of a conducting wire in 5 minutes, what is the value of the current that flows through the wire? |
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| 4833. |
A boy of mass 50 kg running at 5 m/s jumps onto a 20 kg trolley traveling in the same direction at 1.5 m/s. What is their common velocity? |
| Answer» A boy of mass 50 kg running at 5 m/s jumps onto a 20 kg trolley traveling in the same direction at 1.5 m/s. What is their common velocity? | |
| 4834. |
The weight of any person on the moon is about 1/6 times that on the Earth . He can lift a mass of 15 kg on the Earth .what will be the maximum mass, which can be lifted by the same force applied by the person on the moon? |
| Answer» The weight of any person on the moon is about 1/6 times that on the Earth . He can lift a mass of 15 kg on the Earth .what will be the maximum mass, which can be lifted by the same force applied by the person on the moon? | |
| 4835. |
18. A large bubble rises. from bottom of lake to surface so its radius doubles one atmosphere equals to that of column of water of height H depth of lake is |
| Answer» 18. A large bubble rises. from bottom of lake to surface so its radius doubles one atmosphere equals to that of column of water of height H depth of lake is | |
| 4836. |
An alloy of Zn and Cu weighs 16.8g in air and 14.7g in H2O if the relative density of Cu and Zn are 8.9 and 7.1 then find the amount of Cu and Zn in the alloy |
| Answer» An alloy of Zn and Cu weighs 16.8g in air and 14.7g in H2O if the relative density of Cu and Zn are 8.9 and 7.1 then find the amount of Cu and Zn in the alloy | |
| 4837. |
A tuning fork and an air column whose temperature is 51^0 C produce 4 beats in one second, when sounded together. When the temperature of air column decreases the number of beats per second decreases. When the temperature remains 16^{0 ^{}}c only one beat per second is produced. Thefrequency of the tuning fork is(1) 100 Hz (3) 150 Hz ( 2) 75 Hz) 50 Hz |
| Answer» A tuning fork and an air column whose temperature is 51^0 C produce 4 beats in one second, when sounded together. When the temperature of air column decreases the number of beats per second decreases. When the temperature remains 16^{0 ^{}}c only one beat per second is produced. Thefrequency of the tuning fork is(1) 100 Hz (3) 150 Hz ( 2) 75 Hz) 50 Hz | |
| 4838. |
What is the work done in moving 0.5 C charge across two points having potential difference of 8 V ?4 |
Answer» What is the work done in moving 0.5 C charge across two points having potential difference of 8 V ?
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| 4839. |
18.To a man walking at the rate of 3 Km/hr the rain appear to fall vertically when he increases his speed to 6m/s it appear tomeet him at an angle of 45^° with vertical . find speed of rain? 1. 32 2.43 3.53 4.62 |
| Answer» 18.To a man walking at the rate of 3 Km/hr the rain appear to fall vertically when he increases his speed to 6m/s it appear tomeet him at an angle of 45^° with vertical . find speed of rain? 1. 32 2.43 3.53 4.62 | |
| 4840. |
Statement 1: When iron fillings are spread around a magnet, they align themselves as shown.Statement 2: Magnet apply force on each filling which makes them get oriented in the mentioned way. |
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Answer» Statement 1: When iron fillings are spread around a magnet, they align themselves as shown. Statement 2: Magnet apply force on each filling which makes them get oriented in the mentioned way.
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| 4841. |
When density of a material is cons†an t,then value of poisson's ratio for it is |
| Answer» When density of a material is cons†an t,then value of poisson's ratio for it is | |
| 4842. |
A machine gun fires n bullets per second and the mass of each bullet is m. If the speed of bullets is v, then the force exerted on the machine gun will be |
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Answer» A machine gun fires n bullets per second and the mass of each bullet is m. If the speed of bullets is v, then the force exerted on the machine gun will be |
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| 4843. |
State Archimedes' Principle. |
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Answer» State Archimedes' Principle. |
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| 4844. |
Two point charges –Q and +Q√3 are placed in the xy-plane at the origin (0,0) and a point (2,0), respectively, as shown in the figure. This results in an equipotential circle of radius R and potential V=0 in the xy-plane with its center at (b,0). All lengths are measured in meters.The value of b in meter is |
Answer» Two point charges –Q and +Q√3 are placed in the xy-plane at the origin (0,0) and a point (2,0), respectively, as shown in the figure. This results in an equipotential circle of radius R and potential V=0 in the xy-plane with its center at (b,0). All lengths are measured in meters. The value of b in meter is |
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| 4845. |
Three blocks A, B and C of masses 4kg, 2kg and 1kg respectively, are in contact on a frictionless surface, as shown. If a force of 14 N is applied on the 4kg block, then the contact force between A and B is : |
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Answer» Three blocks A, B and C of masses 4kg, 2kg and 1kg respectively, are in contact on a frictionless surface, as shown. If a force of 14 N is applied on the 4kg block, then the contact force between A and B is :
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| 4846. |
A ball is thrown vertically upwards.It was observed at a height 'h' twice with a gap of time interval Δt .Find the initial velocity of the ball in terms of g and h . |
| Answer» A ball is thrown vertically upwards.It was observed at a height 'h' twice with a gap of time interval Δt .Find the initial velocity of the ball in terms of g and h . | |
| 4847. |
A uniform wire of 100 ohm is melted and made in the form of uniform wire,whose length is double that of the original. Find the resistance of the new wire. |
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Answer» A uniform wire of 100 ohm is melted and made in the form of uniform wire,whose length is double that of the original. Find the resistance of the new wire. |
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| 4848. |
An egg sinks when dropped in a container filled with water. If lot of common salt is added to the water then? |
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Answer» An egg sinks when dropped in a container filled with water. If lot of common salt is added to the water then? |
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| 4849. |
A bomb of mass 16 kg is at rest explodes into 2 pieces of masses 4 kg and 12 kg. the velocity of the 12 kg mass is 9m/s .find the kinetic energy of other mass |
| Answer» A bomb of mass 16 kg is at rest explodes into 2 pieces of masses 4 kg and 12 kg. the velocity of the 12 kg mass is 9m/s .find the kinetic energy of other mass | |
| 4850. |
The distance between sun and a planet is r. Theangular momentum of planet around the sun incircular orbit is proportional to1.(1) r(2)r(3) ro(4) |
| Answer» The distance between sun and a planet is r. Theangular momentum of planet around the sun incircular orbit is proportional to1.(1) r(2)r(3) ro(4) | |
