MCQ
In the circuit shown below : The potential difference across the $3 \Omega $ resistor is :
- A$\frac{1}{9}\text{V}$
- B$\frac{1}{2}\text{V}$
- ✓$1V$
- D$2V$
✓
Answer
Correct option: C.
$1V$
The resistors of $1 \Omega , 2 \Omega $ and $3 \Omega $ are connected in series. Therefore, the net resistance,
$\text{R} = \text{R}_1 + \text{R}_2 +\text{R}_3$
$\text{R}=1\Omega+2\Omega+3\Omega=6\Omega$
Current in the circuit will be,
$\text{I}=\frac{\text{V}}{\text{R}}$
or $\text{I}=\frac{2}{6}=\frac{1}{3}\text{A}$
Current $=\frac{1}{3}\text{A}$
Therefore, the voltage across the $3I$ resistor,
$V = IR$
or $\text{V}=\frac{1}{3}\times3=1\text{V}$
$\text{R} = \text{R}_1 + \text{R}_2 +\text{R}_3$
$\text{R}=1\Omega+2\Omega+3\Omega=6\Omega$
Current in the circuit will be,
$\text{I}=\frac{\text{V}}{\text{R}}$
or $\text{I}=\frac{2}{6}=\frac{1}{3}\text{A}$
Current $=\frac{1}{3}\text{A}$
Therefore, the voltage across the $3I$ resistor,
$V = IR$
or $\text{V}=\frac{1}{3}\times3=1\text{V}$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Dissolving suger is an example of $-$
→The frequency of alternating current (a.c.) supply in India is:
Light rays are deviated by a prism. The deviation angle d is measured for light rays of different frequency including blue light and red light. Which graph is correct?
Binary fission is observed in which one of the following figure ?
What happens when calcium is treated with water?
- It does not react with water.
- It reacts violently with water.
- It reacts less violently with water.
- Bubbles of hydrogen gas formed stick to the surface of calcium.
Geotropism was discovered by :
What do you mean by $\text{GAP} :$
→The Chipko movement started from :
Rancidity can be prevented by :
Bee stings can be treated with :