Is electrostatic potential a scalar quantity or a vector quantity?

$A$ metal has a very large number of free electrons and a non-metal has a very small number of free electrons.

What is meant by equivalent resistance?

You are given three resistors of $10\, \Omega, 10\, \Omega, 20\, \Omega$,a battery of emf $2.5\, V$,a key,an ammeter,and a voltmeter. Draw a circuit diagram showing the correct connections of the given components such that the voltmeter gives a reading of $2.0\, V$.

Of the two bulbs in a house, one glows brighter than the other. Which of the two has a larger resistance?

$A$ torch bulb is rated $5\,V$ and $500\,mA$. Calculate its $(i)$ power,$(ii)$ resistance,and $(iii)$ energy consumed when it is lighted for $4$ hours.