Potential and potential difference are vector quantities.

$1\, \mu A = \dots \dots \dots \,mA$

Why is an ammeter likely to be burnt if you connect it in parallel?

Two identical resistors,each of resistance $2 \Omega$,are connected in turn: $(i)$ in series,and $(ii)$ in parallel to a battery of $12 \text{ V}$. Calculate the ratio of power consumed in the two cases.

Give an example of a metal which is the best conductor of heat.

What happens to the resistance of a conductor when the length of the conductor is reduced to half?