1
WB JEE 2024
+1
-0.25

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

A
$$\mathrm{R}=\mathrm{r}$$
B
$$\mathrm{R}=2 \mathrm{r}$$
C
$$\mathrm{R}=3 \mathrm{r}$$
D
$$\mathrm{R}=\frac{\mathrm{r}}{3}$$
2
WB JEE 2023
+1
-0.25

12 $$\mu$$C and 6 $$\mu$$C charges are given to the two conducting plates having same cross-sectional area and placed face to face close to each other as shown in the figure. The resulting charge distribution in $$\mu$$C on surfaces A, B, C and D are respectively,

A
9, 3, $$-$$3, 9
B
3, 9, $$-$$9, 3
C
6, 6, $$-$$6, 12
D
6, 6, 3, 3
3
WB JEE 2023
+1
-0.25

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

A
20 $$\Omega$$
B
320 $$\Omega$$
C
160 $$\Omega$$
D
1.44 k $$\Omega$$
4
WB JEE 2023
+2
-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,

A
$$\frac{4 Q^{2} \mathrm{R}}{3 \mathrm{~T}}$$
B
$$\frac{2 \mathrm{QR}}{3 \mathrm{~T}}$$
C
$$\frac{\mathrm{Q}^{2} \mathrm{~T}}{4 \mathrm{R}}$$
D
$$\mathrm{Q}^{2} \mathrm{RT}$$
EXAM MAP
Medical
NEET