Force, Work, Power and Energy — Physics STD 10 — Question

How is a zinc sulphide screen affected when a cathode ray beam strikes it?

Is power a scalar or a vector quantity?

An equal quantity of heat is supplied to two substances A and B. The substance A shows a greater rise in temperature. What can you say about the heat capacity of A as compared to that of B?

What is the P.E. of a body lying on the surface of the earth?

How does a magnetic field set up by a solenoid change when number of turns are increased?

State the position of heating element with respect to principal focus of concave reflector and give reason for choosing this position.

Give an example of the following use of a machine to change the direction of force.

What are isobars?

Which material is the calorimeter commonly made of? Give one reason for using this material.

Give one disadvantage of using a solar cell.