physics

A satellite revolving around the earth is kept on its orbit by?

A. Centripetal forces only B. Centripetal and frictional forces C. Centrifugal forces only D. Centripetal and centrifugal forces Correct Answer:…

5 years ago

Which of the following statements about wave motion is correct?

A. Electromagnetic waves are transverse B. Transverse waves do not require a medium for propagation C. Longitudinal waves vibrate perpendicular…

5 years ago

Which of the following instruments can be used to measure current in an a.c circuit?

A. Hot wire ammeter B. Moving coil ammeter C. Tangent galvanometer D. Moving coil galvanometer Correct Answer: Option D -…

5 years ago

Which of the following is obtained when a magenta is mixed with green colour?

A. Yellow B. Blue C. White D. Red Correct Answer: Option C - White

5 years ago

Shadows and eclipse result from the?

A. Reflection of light B. Rectilinear propagation of light C. Diffraction of light D. Refraction of light Correct Answer: Option…

5 years ago

A pool of water appears to be 1.00m deep when viewed vertically from above. What is the actual depth of the pool? [Refractive index of water = 1.33]

A. 13.300m B. 0.750m C. 1.013m D. 1.330m Correct Answer: Option D - 1.330m Explanation n = Read depth/Apparent depth…

5 years ago

Vapour is said to be saturated on top of an enclosed liquid if ______?

A. The rate of condensation is greater than that of vapourization B. The rate of condensation is equal to that…

5 years ago

Which of the following does NOT use magnetic effect of current to function?

A. Lead acid accumulator B. An electric bell C. A moving coil galvanometer D. A telephone receiver Correct Answer: Option…

5 years ago

What will happen to the pressure of a gas if its temperature is reduced to -273°C?

A. It will decrease B. it will drop to zero C. It will increase D. It will remain constant Correct…

5 years ago

The relative density of a liquid is the ratio of the?

A. Mass of water to the mass of an equal volume of liquid B. Upthrust in the liquid to the…

5 years ago