Force — Physics STD 10 — Question

A wave has wavelength 50Å of State its one use.

Two wires A and B are made of copper. The wire A is long and thin while the wire B is Short and thick. Which will have more specific resistance ?

What information we seek by the linear magnification of the image when it is positive or negative?

A body is thrown vertically upwards. Its velocity keeps on decreasing. What happens to its kinetic energy as its velocity becomes zero?

How does an alternating current differ from the direct current?

At which point is the centre of gravity situated in a triangular lamina.

Define potential difference between two points.

State the energy changes which take place when A stone dropped from the top of a cliff reaches the ground after some time.

Define the term momentum.