WB JEE 2026 | Current Electricity Question 5 | Physics

WB JEE 2026

MCQ (Single Correct Answer)

-0.25

Consider a fuse wire of length $l$ and radius $r$ ．The time of heating $(t)$ for passing the maximum current will depend on

$t \propto r^2 l$

$t \propto r^3 l^2$

$t \propto r^4 l^0$

$t \propto r^2 l^3$

WB JEE 2024

MCQ (Single Correct Answer)

-0.25

WB JEE 2024 Physics - Current Electricity Question 1 English

Consider a circuit where a cell of emf $$E_0$$ and internal resistance $$\mathrm{r}$$ is connected across the terminal $$\mathrm{A}$$ and $$\mathrm{B}$$ as shown in figure. The value of $$\mathrm{R}$$ for which the power generated in the circuit is maximum, is given by

$$\mathrm{R}=\mathrm{r}$$

$$\mathrm{R}=2 \mathrm{r}$$

$$\mathrm{R}=3 \mathrm{r}$$

$$\mathrm{R}=\frac{\mathrm{r}}{3}$$

WB JEE 2023

MCQ (Single Correct Answer)

-0.25

WB JEE 2023 Physics - Current Electricity Question 2 English

In an experiment on a circuit as shown in the figure, the voltmeter shows 8 V reading. The resistance of the voltmeter is,

20 $$\Omega$$

320 $$\Omega$$

160 $$\Omega$$

1.44 k $$\Omega$$

WB JEE 2023

MCQ (Single Correct Answer)

-0.5

An amount of charge Q passes through a coil of resistance R. If the current in the coil decreases to zero at a uniform rate during time T, then the amount of heat generated in the coil will be,

$$\frac{4 Q^{2} \mathrm{R}}{3 \mathrm{~T}}$$

$$\frac{2 \mathrm{QR}}{3 \mathrm{~T}}$$

$$\frac{\mathrm{Q}^{2} \mathrm{~T}}{4 \mathrm{R}}$$

$$\mathrm{Q}^{2} \mathrm{RT}$$

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