Question Set
Q1. A body is thrown straight up with an initial speed u. What is the total time it takes to return to the ground?
a) u divided by g
b) Two times u divided by g
c) u squared divided by two g
d) Two g divided by u
Answer: b) Two times u divided by g
a) u divided by g
b) Two times u divided by g
c) u squared divided by two g
d) Two g divided by u
Answer: b) Two times u divided by g
Q2. What is the dimension of pressure in terms of mass, length, and time?
a) Mass times length to the power zero times time to the power minus two
b) Mass times length to the power minus one times time to the power minus two
c) Mass to power zero times length to the power one times time squared
d) Mass times length squared times time to the power minus one
Answer: b) Mass times length to the power minus one times time to the power minus two
a) Mass times length to the power zero times time to the power minus two
b) Mass times length to the power minus one times time to the power minus two
c) Mass to power zero times length to the power one times time squared
d) Mass times length squared times time to the power minus one
Answer: b) Mass times length to the power minus one times time to the power minus two
Q3. If the momentum of a body is doubled, how does its kinetic energy change?
a) Doubled
b) Halved
c) Four times
d) Same
Answer: c) Four times
a) Doubled
b) Halved
c) Four times
d) Same
Answer: c) Four times
Q4. Which law states that the magnetic field is directly proportional to current?
a) Faraday’s law
b) Lenz’s law
c) Ohm’s law
d) Biot-Savart law
Answer: d) Biot-Savart law
a) Faraday’s law
b) Lenz’s law
c) Ohm’s law
d) Biot-Savart law
Answer: d) Biot-Savart law
Q5. What happens at resonance in an LCR circuit?
a) Current becomes maximum
b) Impedance becomes maximum
c) Voltage becomes minimum
d) Power becomes zero
Answer: a) Current becomes maximum
a) Current becomes maximum
b) Impedance becomes maximum
c) Voltage becomes minimum
d) Power becomes zero
Answer: a) Current becomes maximum
Q6. In uniform circular motion, acceleration is directed
a) Tangent to the path
b) Perpendicular to the velocity
c) Along the velocity
d) Away from the center
Answer: b) Perpendicular to the velocity
a) Tangent to the path
b) Perpendicular to the velocity
c) Along the velocity
d) Away from the center
Answer: b) Perpendicular to the velocity
Q7. A transformer works on
a) Direct current only
b) Alternating current only
c) Both direct and alternating
d) Cannot be said
Answer: b) Alternating current only
a) Direct current only
b) Alternating current only
c) Both direct and alternating
d) Cannot be said
Answer: b) Alternating current only
Q8. The unit of electric charge is
a) Volt
b) Ohm
c) Coulomb
d) Watt
Answer: c) Coulomb
a) Volt
b) Ohm
c) Coulomb
d) Watt
Answer: c) Coulomb
Q9. One kilowatt hour equals
a) Three point six million joules
b) Three thousand joules
c) Thirty-six hundred joules
d) Three point six joules
Answer: a) Three point six million joules
a) Three point six million joules
b) Three thousand joules
c) Thirty-six hundred joules
d) Three point six joules
Answer: a) Three point six million joules
Q10. The speed of light in a vacuum is
a) Three into ten to the power six
b) Three into ten to the power eight
c) Three into ten to the power five
d) One into ten to the power eight
Answer: b) Three into ten to the power eight
a) Three into ten to the power six
b) Three into ten to the power eight
c) Three into ten to the power five
d) One into ten to the power eight
Answer: b) Three into ten to the power eight
Q15. Which of the following quantities is a vector?
a) Speed
b) Distance
c) Displacement
d) Work
Answer: c) Displacement
a) Speed
b) Distance
c) Displacement
d) Work
Answer: c) Displacement
Q16. Which instrument is used to measure current?
a) Voltmeter
b) Ammeter
c) Galvanometer
d) Thermometer
Answer: b) Ammeter
a) Voltmeter
b) Ammeter
c) Galvanometer
d) Thermometer
Answer: b) Ammeter
Q17. What is the SI unit of force?
a) Newton
b) Joule
c) Watt
d) Pascal
Answer: a) Newton
a) Newton
b) Joule
c) Watt
d) Pascal
Answer: a) Newton
Q18. What does Ohm law relate?
a) Voltage and charge
b) Current and resistance
c) Voltage, current and resistance
d) Power and energy
Answer: c) Voltage, current and resistance
a) Voltage and charge
b) Current and resistance
c) Voltage, current and resistance
d) Power and energy
Answer: c) Voltage, current and resistance
Q19. When a body moves in a circle with constant speed, its acceleration is
a) Zero
b) Constant
c) Directed outward
d) Directed towards center
Answer: d) Directed towards center
a) Zero
b) Constant
c) Directed outward
d) Directed towards center
Answer: d) Directed towards center
Q20. In which medium does sound travel the fastest?
a) Air
b) Water
c) Steel
d) Vacuum
Answer: c) Steel
a) Air
b) Water
c) Steel
d) Vacuum
Answer: c) Steel
Q21. Which phenomenon explains the blue color of the sky?
a) Dispersion
b) Reflection
c) Refraction
d) Scattering
Answer: d) Scattering
a) Dispersion
b) Reflection
c) Refraction
d) Scattering
Answer: d) Scattering
Q22. Heat is a form of
a) Matter
b) Energy
c) Pressure
d) Radiation only
Answer: b) Energy
a) Matter
b) Energy
c) Pressure
d) Radiation only
Answer: b) Energy
Q23. The unit of frequency is
a) Decibel
b) Watt
c) Hertz
d) Tesla
Answer: c) Hertz
a) Decibel
b) Watt
c) Hertz
d) Tesla
Answer: c) Hertz
Q24. Which quantity remains constant in a perfectly elastic collision?
a) Momentum only
b) Energy only
c) Both momentum and kinetic energy
d) Velocity only
Answer: c) Both momentum and kinetic energy
a) Momentum only
b) Energy only
c) Both momentum and kinetic energy
d) Velocity only
Answer: c) Both momentum and kinetic energy