171. The dimension of pressure is
A. MLT
B. ML-1T-1
C. ML-1T-2
D. ML-2T-2
✅ The correct answer is option C.
Physics MCQs
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172. Temperature is a property which determines
A. How much heat a body contains
B. Whether a body will feel hot or cold to touch
C. In which direction heat will flow between two systems
D. How much total absolute energy a body has
✅ The correct answer is option C.
173. We prefer mercury as a thermometric substance because
A. Over a wide range of temperature, its expansion is uniform
B. It does not stick to thermometer glass
C. It opaque to light
D. All of above
✅ The correct answer is option D.
174. The scales of temperature are based on two fixed points which are
A. The temperatures of water at 0° 100°C
B. The temperature of melting ice and boiling water at atmospheric pressure
C. The temperatures of ice cold and boiling water
D. The temperatures of frozen and boiling mercury
✅ The correct answer is option B.
175. The numerical value of Boltzmann’s constant is
A. 1.38×10-31JK-1
B. 3.18×10-31JK-1
C. 3.18×10-23JK-1
D. 1.38×10-23JK-1
✅ The correct answer is option D.
176. In a clinical thermometer, the mercury in the capillary tube does not contract once removed from the patient because
A. Mercury takes a long time to contract
B. The amount of mercury use is very small
C. The capillary tube has a small constriction near the bulb
D. The capillary tube is very narrow
✅ The correct answer is option C.
177. Waves transmit __________________ from one place to another
A. Energy
B. Mass
C. Both
D. None
✅ The correct answer is option A.
178. Normal human body temperature 98.6°F corresponds to
A. 37°C
B. 42°C
C. 55°C
D. 410°C
✅ The correct answer is option A.
179. Geostationary satellite completes one rotation around the earth in
A. 3 hours
B. 6 hours
C. 12 hours
D. 24 hours
✅ The correct answer is option D.
180. The radius of geostationary orbit from the centre of the earth is nearly
A. 42000km
B. 36000km
C. 24000 km
D. 18000 km
✅ The correct answer is option A.