If $1\, ampere$ electric current passes through a conductor, how many electrons will pass per second?
$6.25 \times 10^{19}$
$6.25 \times 10^{18}$
$1.6 \times 10^{19}$
$1.6 \times 10^{18}$
What is meant by "electrical resistance" of a conductor ? State how resistance of a conductor is affected when $(i)$ a low current passes through it for a short duration; $(ii)$ heavy current passes through it for about $30$ seconds.
An electric bulb of resistance $480\, \Omega$ is connected to $220$ volt main. Find the amount of electrical energy consumed in $10$ seconds.
What happens to the resistance of a conductor when temperature is increased ?
If the charge on an electron be $1.6 \times 10^{-19} C$, find the approximate number of electrons in $1 C$
A nichrome wire has a resistance of $10\, \Omega$. Find the resistance of another nichrome wire, whose length is three times and area of cross-section four times the first wire.