Electricity — Science STD 10 — Question

State whether the fission of uranium-235 is caused by low energy neutrons or high energy neutrons.

What do you understand by the term “potential difference”?

Which causes more bending (or more refraction) of light rays passing through it:
a convex lens of long focal length or a convex lens of short focal length?

Where should an object be placed in front of a convex lens so as to obtain its virtual, erect and magnified image?

Name the phenomenon which is made use of in an electric generator.

A lens is cut into two equal halves:
Perpendicular to principal axis. What will be the focal length of each half?

What is the unit of electric charge?

Give the scientific names of the following parts of the eye:
A hole in the middle of the iris.

What is the ratio of the height of an image to the height of an object known as?

The lens A has a focal length of 25cm whereas another lens B has a focal length of 60cm. Giving reason state, which lens has more power: A or B