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

State under what conditions force acting on a current carrying conductor which is freely suspended in a magnetic field can be Zero.

Name the physical quantity which is measured by an ammeter.

The voltage applied to a given rheostat is made four times its initial value. By what factor will be resistance of the rheostat change?

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?

Give one example when:
Kinetic energy changes to heat energy.

A radioactive source emits three types of radiations.

Name the radiations which are deflected by the electric field.

State the position of object, position of image, nature of image when: Convex lens is used as an erecting lens in terrestrial telescope.

A ray of light is normally incident on one face of an equilateral glass prism. Answer the following:
What is the angle of incidence on the first face of the prism?

Name a machine which is used to:
change the direction of force applied.