Power of a lamp is $60\, W$. Find the energy in joules consumed by it in $1\, s$. (in $, J$)

$A$ $100 \text{ W}$ electric bulb is lighted for $2 \text{ hours}$ daily,and four $40 \text{ W}$ bulbs are lighted for $4 \text{ hours}$ everyday. Calculate the energy consumed (in $\text{kWh}$) in $30 \text{ days}$.

What are the factors on which heat dissipated by a conductor depends?

Which effect of electric current is used in electroplating?

Give reasons for the following:
$(i)$ Tungsten is used almost exclusively for the filament of electric lamps.
$(ii)$ Why do we use copper and aluminium wires for the transmission of electric current?

When an electric iron is connected to a $220\;V$ line and a current of $5\;A$ flows through it,what is the power of the iron?