What is the formula to find electric power $P$?

Define one watt.

Two electric circuits $I$ and $II$ are shown in the figure.
$(i)$ Which of the two circuits has more resistance?
$(ii)$ Through which circuit does more current pass?
$(iii)$ In which circuit is the potential difference across each resistor equal?

$A$ conducting wire offers resistance to the flow of electrons because electrons repel each other in the wire.

If you connect three resistors having values $2 \, \Omega$, $3 \, \Omega$, and $5 \, \Omega$ in parallel, will the value of total resistance be less than $2 \, \Omega$, greater than $5 \, \Omega$, or lie between $2 \, \Omega$ and $5 \, \Omega$? Explain.

State which has a higher resistance,a $50 \, W$ or a $25 \, W$ lamp bulb,and by how many times?