An electric heater draws $3.5 \mathrm{A}$ from a $110 \mathrm{V}$ source. The resistance of the heating element is approximately.

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

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?

In figure $R_1=10 \mathrm{\Omega }, R_{\mathit{2}}=40\mathit{ }\mathrm{\Omega }, R_3=30\mathit{ }\mathrm{\Omega }, R_4=20 \mathrm{\Omega }, {\mathrm{R}}_5=60 \mathrm{\Omega }$ and a $12 \mathrm{V}$ battery is connected to the arrangement. Calculate:

(a) Total resistance in the circuit.

(b) Total current flowing in the circuit.

State and explain Ohm's Law.

Following figures shows graph of $I-V$. Which graph is correct according to Ohm's law?

Write Ohm's law. Draw a circuit diagram to prove it experimentally in the laboratory.

Establish relation between potential difference $V$ and electric current $I$ by plotting graph.

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?

Observe the correlation in the first pair and complete the second pair:
$1 \mathrm{volt}=\frac{1 \mathrm{Joule}}{1 \mathrm{Coulomb}}$:: $1 \mathrm{ohm}=$________

Write Ohm's law.