Machines — Physics STD 10 — Question

A mixture of radioactive substance gives off three types of radiation name the radiation which is not affected by an electric field.

What are ohmic and non ohmic resistance? Give example of each.

State the use of echo by a bat, dolphin and fisherman.

What is a single fixed pulley? State its one use.

(a) When can an electric charge give rise to a magnetic field?
(b) A wire bent into a circle, carries current in an anticlockwise direction. What polarity does this face of coil exhibit?

Define the term angle of deviation

Give two examples of kinetic energy.

Explain, why quartz prism is required for obtaining the spectrum of ultra-violet light?

State the position of object, position of image, nature of image when: Convex lens is used as objective lens of photographic camera.

How is the magnification (m) produced by a lens related to the object distance (u) and the image distance (v)?