Work, Energy and Power — Physics STD 10 — Question

Name two factors on which the specific resistance of a wire depends?

State the energy changes in the following case while in use:
a petrol engine of a running car

Is power a scalar or a vector quantity?

The following belong to which class of lever?
Pliers Tools

A wire, bent into a circle, carries current in an anticlockwise direction. What polarity does this face of the coil exhibit?

Compare the penetrating powers of α, β and γ-radiations.

The work done by a fielder when he takes a catch in a cricket match, is negative Explain.

Explain, why the potential difference across the terminals of a cell is more when the cell is not in use than it is when the cell is being used.

Give one disadvantage of using a solar cell.

Name a common device that uses electromagnets.