State Ohm’s law.

On what factor does the resistance of a wire depend at a particular temperature?

Name any two appliances which work under the principle of heating effect of current.

Calculate the amount of charge that would flow in 2 hours through an element of an electric bulb drawing a current of 2.5A.

The values of current I flowing through a resistor for various potential differences V across the resistor are given below. What is the value of resistor?

I (ampere)	0.5	1.0	2.0	3.0	4.0
V (volt)	1.6	3.4	6.7	10.2	13.2

[Hint: plot V-I graph and take slope]