Internal resistance is inversely proportional to the surface area of the electrodes in the electrolyte.

In what combination, two resistors are to be connected so that the equivalent resistance is smaller than both the resistances?

How does the resistance of semiconductors change with an increase in temperature?

How is the concept of resistance obtained from Ohm's law?

A current of $1 \mathrm{A}$ flows when an electric bulb is connected to $220 \mathrm{V}$ mains. What would be the current when the same bulb is connected to a $110 \mathrm{V}$ main?

A thin wire and a thick wire of the same conducting material have the same length. Which one of them will carry more current when connected to the same potential difference?

Calculate the equivalent resistance when a wire of $10 \mathrm{ohm}$ is divided into two equal parts and connected in a parallel combination.

Two resistance $r_1 \mathrm{and} r_2$ when connected separately to the same potential difference, it was seen that the current flowing through $r_1$ was six times the current flowing through $r_2$. Determine the ratio of $r_1$ and $r_2$.

Calculate the effective resistance across AB.

The series combination of two $10 \mathrm{ohm}$ resistances is connected in parallel combination with a $20 \mathrm{ohm}$ resistance. Determine the equivalent resistance of the final combination.

The potential difference between the two ends of a conductor is $V$, and the current flowing through the conductor is $I$. At a constant temperature, which of the following statement is true for the conductor?

Two resistances are to be connected in which combination so that the equivalent resistance becomes less than the individual resistances?

The diagram above shows a circuit with the key k open. Calculate the resistance of the circuit when the key k is open and calculate the current drawn from the cell when the key k is open.

Two lamps, one rated $100 \mathrm{W}$ at $220 \mathrm{V}$, and the other $60 \mathrm{W}$ at $220 \mathrm{V}$, are connected in parallel to the electric mains supply. What current is drawn from the line if the supply voltage is $220 \mathrm{V}$?

Which of the units given below is the SI unit of resistance?