Q.1:- Which of the following is a scalar quantity ?
- Electric Current
- Electric Field
- Acceleration
- Linear Momentum
Ans:- (a) Electric Current
Q.2:- The instrument used to measure pressure ?
- Aneroid Barometer
- Anemometer
- Thermometer
- Hygrometer
Ans:- (a) Aneroid Barometer
Q.3:- Which of the following works on the basis of conservation of linear momentum ?
- Rocket
- Helicopter
- Jet
- Aeroplane
Ans:- (a) Rocket
Q.4:- Definition of force comes from Newton’s ?
- First law of motion
- Second law of motion
- Third law of motion
- Law of gravitation
Ans:- (a) First law of motion
Q.5:- A The shape of a rain drop is spherical due to ?
- Viscosity
- Surface Tension
- Elasticity
- Gravitation
Ans:- (b) Surface Tension
Q.6:- A floating body always displaces liquid equal to its own ?
- Mass
- Volume
- Weight
- None
Ans:- (c) Weight
Q.7:- ‘Dynamic Lift’ is related to ?
- Bernouli’s Theorem
- Archimedes’ Principle
- Equation of continuity
- Pascal’s Law
Ans:- (a) Bernouli’s Theorem
Q.8:- SI unit of heat is ?
- Calorie
- Joule
- Kilo Calorie
- Kelvin
Ans:- (b) Joule
Q.9:- The gas thermometer is more sensitive than the liquid thermometers because gases ?
- Expand more than liquids
- Do not change their states easily
- Are much lighter
- Are easy to obtain
Ans:- (a) Expand more than liquids
Q.10:- SI unit of temperature is ?
- Kelvin
- Celsius
- Fahrenheit
- Joule
Ans:- (a) Kelvin
Q.11:- The temperature of the Sun is measured with ?
- Platinum thermometer
- Pyrometer
- Gas thermometer
- Vapour pressure thermometer
Ans:- (b) Pyrometer
Q.12:- A liquid initially contracts when cooled down to 4 degree Celsius but on further cooling down to 0 degree Celsius, it expands. The liquid is ?
- Alcohol
- Water
- Molten Iron
- Mercury
Ans:- (b) Water
Q.13:- If an ideal gas is isothermally expanded, its internal energy will ?
- Increase
- Decrease
- Remain the same
- None of these
Ans:- (c) Remain the same
Q.14:- Which of the following substances has greatest specific heat ?
- Iron
- Water
- Copper
- Mercury
Ans:- (b) Water
Q.15:- The unit of latent heat is ?
- Cal-g
- Cal/oC
- Cal/g
- None of these
Ans:- (c) Cal/g
Q.16:- Device used to measure very high temperature is ?
- Pyrometer
- Thermometer
- Bolometer
- Calorimeter
Ans:- (a) Pyrometer
Q.17:- Heat given to an ideal gas under isothermal conditions is used ?
- Increasing the temp
- In doing external work
- In increasing the internal energy
- None of these
Ans:- (b) In doing external work
Q.18:- A gas behaves as an ideal gas more closely at ?
- Low pressure and high temp
- High pressure and low temp
- Low pressure and low temp
- High pressure land high temp
Ans:- (c) Low pressure and low temp
Q.19:- The absorptive power of a perfectly black body is ?
- 1
- 0
- ∞
- None
Ans:- (a) 1
Q.20:- The freezer in a refrigerator is located at the top section so that ?
- The entire chamber of the refrigerator is cooled quickly due to convection
- The motor is not heated
- The heat gained from the environment is high
- The heat gained from the environment is low
Ans:- (a) The entire chamber of the refrigerator is cooled quickly due to convection
Q.21:- The thermal conductivity of a plate depends on ?
- The temperature difference between the two sides
- The thickness of the plate
- The area of the plate
- None of these above
Ans:- (c) The area of the plate
Q.22:- Which colour of heat radiation represents the highest temperature ?
- Blood Red
- Dark Cherry
- Salmon
- White
Ans:- (d) White
Q.23:- If the temperature at which the speed of sound in air becomes double of its value at 27 oC ?
- 54 oC
- 327 oC
- 927 oC
- -123 oC
Ans:- (c) 927 oC
Q.24:- The quality of sound produced by an instrument depends on the ?
- Frequency
- Intensity
- Number of overtones
- None of these
Ans:- (c) Number of overtones
Q.25:- Pitch of sound depends on ?
- Frequency
- Wavelength
- Amplitude
- Speed
Ans:- (a) Frequency
