NDA PHYSICS QUIZ - 29

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Question 1:

Which of the following is the motion in which an object moves such that its distance from a fixed point remains the same?

Question 2:

The loudness or softness of a sound is determined by which of the following ?

Question 3:

Which of the following is the insulator?

Question 4:

Find the initial velocity of a car which takes 10 seconds to stop after applying brakes. The retardation due to brakes is 2.5 m/s2.

Question 5:

A permanent magnet repels only -

Question 6:

If the earth stops rotating, the apparent value of g on the earth surface will -

Question 7:

How much energy is transferred by a 12 V power supply to each coulomb of charge which it moves around a circuit ?

Question 8:

When a current of 4.0 A passes through a certain resistor for 10 minutes, 2.88 x 10J of heat are produced. Calculate the power of the resistor.

Question 9:

Find the energy in kWh consumed in 10 hours by four devices of power 500 W each. 

Question 10:

A rocket with a lift-off mass 20,000 kg is blasted upwards with an initial acceleration of 5.0 ms-2. Calculate the initial thrust (force) of the blast.