InterviewSolution
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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.
| 1951. |
Why do certain colours absorb heat and certain colours reflect |
| Answer» Why do certain colours absorb heat and certain colours reflect | |
| 1952. |
A boy weighing 600 N is in a lift. If the lift experiences a breakdown and starts falling freely under the action of gravity, what would be the apparent weight of the boy in the lift? |
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Answer» A boy weighing 600 N is in a lift. If the lift experiences a breakdown and starts falling freely under the action of gravity, what would be the apparent weight of the boy in the lift? |
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| 1953. |
The mass and diameter of a planet are twice those of earth. The period of oscillation of pendulum on this planet will be |
| Answer» The mass and diameter of a planet are twice those of earth. The period of oscillation of pendulum on this planet will be | |
| 1954. |
8.A body weighed 250 N on the surface of earth. Assuming the earth to be a sphere of uniform mass density, how much would it weigh half way down to the centre of earth? |
| Answer» 8.A body weighed 250 N on the surface of earth. Assuming the earth to be a sphere of uniform mass density, how much would it weigh half way down to the centre of earth? | |
| 1955. |
Question 14 The average age of children of Class VII is 12 years and 3 months express this age in seconds. |
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Answer» Question 14 The average age of children of Class VII is 12 years and 3 months express this age in seconds. |
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| 1956. |
Speed of light fastest and slowest in which object? |
| Answer» Speed of light fastest and slowest in which object? | |
| 1957. |
The strength of the south pole of a magnet is _______ the strength of its north pole. |
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Answer» The strength of the south pole of a magnet is _______ the strength of its north pole. |
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| 1958. |
27 In a vertical circular motion of radius r a particle is just able to the complete the circle accleration of the particle when it's velocity become vertical is |
| Answer» 27 In a vertical circular motion of radius r a particle is just able to the complete the circle accleration of the particle when it's velocity become vertical is | |
| 1959. |
A coil of inductance 0.5 H and resistance 100 ohm is connected to a 240 V,50 Hz ac supply (1) what is the maximum current in the coil (2) what is the lag between the voltage maximum and the current maximum |
| Answer» A coil of inductance 0.5 H and resistance 100 ohm is connected to a 240 V,50 Hz ac supply (1) what is the maximum current in the coil (2) what is the lag between the voltage maximum and the current maximum | |
| 1960. |
A boy weighs 600 N on the Earth. What would be his weight on the moon? (acceleration due to gravity on moon = 16th acceleration due to gravity on earth) |
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Answer» A boy weighs 600 N on the Earth. What would be his weight on the moon? (acceleration due to gravity on moon = 16th acceleration due to gravity on earth) |
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| 1961. |
14.A uniform disc of R is to be suspended through a small hole made in the disc the mnmum possible time period of the disc for small oscillation will be |
| Answer» 14.A uniform disc of R is to be suspended through a small hole made in the disc the mnmum possible time period of the disc for small oscillation will be | |
| 1962. |
Define propagation of wave |
| Answer» Define propagation of wave | |
| 1963. |
Can a motion in rest be also in a constant motion |
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Answer» Can a motion in rest be also in a constant motion |
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| 1964. |
If the incident ray makes an angle of 55∘ with the normal, what angle would the reflected ray make with normal? |
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Answer» If the incident ray makes an angle of 55∘ with the normal, what angle would the reflected ray make with normal? |
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| 1965. |
Question 23How does use of a fuse wire protect electrical appliances? |
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Answer» Question 23 How does use of a fuse wire protect electrical appliances? |
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| 1966. |
A juice seller was serving his customers using glasses as shown in Fig. The inner diameter of the cylindrical glass was 5 cm, but the bottom of the glass had a hemispherical raised portion which reduced the capacity of the glass. If the height of a glass was 10 cm, find the apparent capacity of the glass and its actual capacity. (Use π=3.14). [3 MARKS] |
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Answer» A juice seller was serving his customers using glasses as shown in Fig. The inner diameter of the cylindrical glass was 5 cm, but the bottom of the glass had a hemispherical raised portion which reduced the capacity of the glass. If the height of a glass was 10 cm, find the apparent capacity of the glass and its actual capacity. (Use π=3.14). [3 MARKS]
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| 1967. |
Give 10 examples each of body under rest and body under motion. |
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Answer» Give 10 examples each of body under rest and body under motion. |
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| 1968. |
Time period of a sound wave is 0.025s,thenthe frequency of the sound wave would be? |
| Answer» Time period of a sound wave is 0.025s,thenthe frequency of the sound wave would be? | |
| 1969. |
A barometer gives wrong readings because some air is present above the mercury column. At a pressure of P_{01}=755mm of Hg the barometer shows P_1=748mm and at P_{02}=740mm it shows P_2=736mm. Then the length l of the barometer tu |
| Answer» A barometer gives wrong readings because some air is present above the mercury column. At a pressure of P_{01}=755mm of Hg the barometer shows P_1=748mm and at P_{02}=740mm it shows P_2=736mm. Then the length l of the barometer tu | |
| 1970. |
what is meant by sensitivity of metre bridge and potentiometr |
| Answer» what is meant by sensitivity of metre bridge and potentiometr | |
| 1971. |
if there are 2 charges q and -q then where does the null point of electric field lines lie? Explain pictorially? |
| Answer» if there are 2 charges q and -q then where does the null point of electric field lines lie? Explain pictorially? | |
| 1972. |
When quantization of charge can be neglected?? |
| Answer» When quantization of charge can be neglected?? | |
| 1973. |
a square of side 3 cm is placed at a dis†an ce of 25 cm from a concave mirror of focal length 20cm .The centre of the square is at the axis of the mirror and the plane is normal to the axis .The area enclosed by the image of the square is |
| Answer» a square of side 3 cm is placed at a dis†an ce of 25 cm from a concave mirror of focal length 20cm .The centre of the square is at the axis of the mirror and the plane is normal to the axis .The area enclosed by the image of the square is | |
| 1974. |
How potential energy is produced |
| Answer» How potential energy is produced | |
| 1975. |
The maximum energy in the thermal radiation from a hot source occurs at a wavelength of 11×10−5 cm. According to Wein's law, the temperature of the source (on Kelvin scale) will be 'n' times the temperature of another source (on Kelvin scale) for which the wavelength at maximum energy is 5.5×10−5 cm.The value 'n' is |
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Answer» The maximum energy in the thermal radiation from a hot source occurs at a wavelength of 11×10−5 cm. According to Wein's law, the temperature of the source (on Kelvin scale) will be 'n' times the temperature of another source (on Kelvin scale) for which the wavelength at maximum energy is 5.5×10−5 cm.The value 'n' is |
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| 1976. |
A: A particle of mass m strikes a smooth wedge ofmass M as shown in the figure. Linearmomentum of particle along the surface of wedgeis conserved during collision.m VoSmooth R: Wedge exerts a force perpendicular to inclinedface of wedge on particle during collision. |
| Answer» A: A particle of mass m strikes a smooth wedge ofmass M as shown in the figure. Linearmomentum of particle along the surface of wedgeis conserved during collision.m VoSmooth R: Wedge exerts a force perpendicular to inclinedface of wedge on particle during collision. | |
| 1977. |
Nikhilesh has a strange piece which can attract many objects including some non-magnetic substances. What are the things would he need to find whether it is a magnet or not? |
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Answer» Nikhilesh has a strange piece which can attract many objects including some non-magnetic substances. What are the things would he need to find whether it is a magnet or not? |
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| 1978. |
Explain the factors on which the loudness of sound depends. |
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Answer» Explain the factors on which the loudness of sound depends. |
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| 1979. |
Question 18Suppose a stick is struck against a frying pan in vacuum. Will the frying pan vibrate? Will we be able to hear the sound? Explain. |
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Answer» Question 18 Suppose a stick is struck against a frying pan in vacuum. Will the frying pan vibrate? Will we be able to hear the sound? Explain. |
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| 1980. |
ntProve that the capacitance of a parallel plate capacitor reduces when it is connected with another capacitor in series.n |
| Answer» ntProve that the capacitance of a parallel plate capacitor reduces when it is connected with another capacitor in series.n | |
| 1981. |
What will be formula of heat dissipated for LCR circuit with AC source |
| Answer» What will be formula of heat dissipated for LCR circuit with AC source | |
| 1982. |
Two paths lead to the top of a hill from the same point on the ground. The path I have a length of 500 meters and Path II has a length of 2000 meters. The gain of potential energy is more for which of the paths? |
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Answer» Two paths lead to the top of a hill from the same point on the ground. The path I have a length of 500 meters and Path II has a length of 2000 meters. The gain of potential energy is more for which of the paths? |
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| 1983. |
If x = e5t where x is the position of a particle in meter, then position of the particle at time t = 1 s is equal to |
| Answer» If x = e5t where x is the position of a particle in meter, then position of the particle at time t = 1 s is equal to | |
| 1984. |
10. Proof of distance formula and section formula |
| Answer» 10. Proof of distance formula and section formula | |
| 1985. |
The guage pressure exerted below a column of water, open to the earth's atmosphere at depth of 10 m is (density of water = 1000 kg/m3, g = 10 m/s2 and 1 atm pressure = 105 Pa) |
| Answer» The guage pressure exerted below a column of water, open to the earth's atmosphere at depth of 10 m is (density of water = 1000 kg/m3, g = 10 m/s2 and 1 atm pressure = 105 Pa) | |
| 1986. |
In the arrangement pins a, b, c and are fixed to a circular metal loop with the help of wax.The metal loop is heat at A is heated up .In which order would the pins fall |
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Answer» In the arrangement pins a, b, c and are fixed to a circular metal loop with the help of wax.The metal loop is heat at A is heated up .In which order would the pins fall |
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| 1987. |
A pendulum takes 10 sec to complete 5 oscillations. What is the time period of the pendulum? |
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Answer» A pendulum takes 10 sec to complete 5 oscillations. What is the time period of the pendulum? |
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| 1988. |
derive that the number of image formed between 2 plane enklined mirrors with diagram |
| Answer» derive that the number of image formed between 2 plane enklined mirrors with diagram | |
| 1989. |
Question 21Name four appliances wherein an electric motor, a rotating device that converts electrical energy to mechanical energy, is used as an important component. In what respect motors are different from generators? |
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Answer» Question 21 |
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| 1990. |
47.A plane mirror coincides with a plane having equation x=3. A particle is moving along a line with directions ratios 3,4,5. If speed of the particle is root 2 ,the velocity of its image is |
| Answer» 47.A plane mirror coincides with a plane having equation x=3. A particle is moving along a line with directions ratios 3,4,5. If speed of the particle is root 2 ,the velocity of its image is | |
| 1991. |
Define heat energy and its units |
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Answer» Define heat energy and its units |
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| 1992. |
Five identical charges q are placed at five corners of a regular hexagon of side l. Find the magnitude of electric field at centre |
| Answer» Five identical charges q are placed at five corners of a regular hexagon of side l. Find the magnitude of electric field at centre | |
| 1993. |
What is principal focus |
| Answer» What is principal focus | |
| 1994. |
M is the midpoint of the straight line AB. If the position vectors of A and B be a and b respectively, determine the position vector of M. |
| Answer» M is the midpoint of the straight line AB. If the position vectors of A and B be a and b respectively, determine the position vector of M. | |
| 1995. |
138 A Laser light of wavelength 660nm is used to weld Retina detachment. If a Laser pulse of width 60ms and power 0.5kW is used, the approximate number of photons in the pulse are |
| Answer» 138 A Laser light of wavelength 660nm is used to weld Retina detachment. If a Laser pulse of width 60ms and power 0.5kW is used, the approximate number of photons in the pulse are | |
| 1996. |
In the graph given below |
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Answer» In the graph given below
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| 1997. |
According to points made in the passage by the author, scientists agree that lightning can occur when: |
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Answer» According to points made in the passage by the author, scientists agree that lightning can occur when: |
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| 1998. |
What can be done to prevent air pollution? |
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Answer» What can be done to prevent air pollution? |
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| 1999. |
Question 3Calculate the wavelength of a sound wave whose frequency is 220 Hz and speed is 440 m/s in a given medium. |
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Answer» Question 3 Calculate the wavelength of a sound wave whose frequency is 220 Hz and speed is 440 m/s in a given medium. |
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| 2000. |
A bus appears to go with a speed of 25km/hr to a car driver driving at the rate 7km/hr northwards.if the bus actually travels in east direction its speed is |
| Answer» A bus appears to go with a speed of 25km/hr to a car driver driving at the rate 7km/hr northwards.if the bus actually travels in east direction its speed is | |
