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The flute mentioned in the question (ii) was being played by a passenger on a stationary bus. The bus then moves uniformly. Explain what change in the pitch of the flute sound, if any, a person sitting on a bench at the bus park will feel when the bus starts moving.

Obtain an expression for the efficiency of this heat engine

Define Magnetic flux density.

Under what condition does the efficiency of such engine become zero percentage, if at all?

A thermodynamic system is taken from to via and then returned to via as shown in the diagram. The area of which segment of the graph represents the total work done by the system?

A diffraction pattern is obtained using a beam of red light. What will be the effect on the diffraction pattern if the red light is replaced with white light?

A circular coil has turns, radius , and carries a current . Which physical quantity is given by the product ?

Which of the following is a correct formula for calculating the radius of gyration of a rotating object?

State the condition necessary for the drop to remain stationary. Also, sketch the forces acting on the oil drop.

Calculate the maximum speed of a building shaken by S-waves of 21Hz and amplitude 0.05m.

Determine the half-life of the sample

Explain why the data are scattered.

Derive an expression for a radioactive process where the symbols carry their standard meanings.

What happens to the neutral temperature if the cold junction of a thermocouple is decreased?

State how he would recognize the balance point.

Explain why he is unable to find a balance point and state the change he must make in order to achieve the balance

Explain what is meant by quantization of charge.

Explain why tall buildings are more susceptible to damage by S-waves which generally have a low frequency.