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Question

Physics Question on Capacitance

A galvanometer (G) of 2Ω2 \, \Omega resistance is connected in the given circuit. The ratio of charge stored in C1C_1 and C2C_2 is:
Circuit diagram

A

23\frac{2}{3}

B

32\frac{3}{2}

C

1

D

12\frac{1}{2}

Answer

12\frac{1}{2}

Explanation

Solution

Given: - Capacitance of C1=4μFC_1 = 4 \, \mu F - Capacitance of C2=6μFC_2 = 6 \, \mu F - Voltage across the circuit: V=6VV = 6 \, V

Step 1: Charge Stored on Capacitors

The charge stored on a capacitor is given by:

Q=C×VQ = C \times V

where CC is the capacitance and VV is the potential difference across the capacitor.

Step 2: Calculating Charge on C1C_1

The charge stored on C1C_1 is:

Q1=C1×V=4×106F×6VQ_1 = C_1 \times V = 4 \times 10^{-6} \, F \times 6 \, V Q1=24×106C=24μCQ_1 = 24 \times 10^{-6} \, C = 24 \, \mu C

Step 3: Calculating Charge on C2C_2

The charge stored on C2C_2 is:

Q2=C2×V=6×106F×6VQ_2 = C_2 \times V = 6 \times 10^{-6} \, F \times 6 \, V Q2=36×106C=36μCQ_2 = 36 \times 10^{-6} \, C = 36 \, \mu C

Step 4: Ratio of Charge Stored in C1C_1 and C2C_2

The ratio of the charge stored in C1C_1 to the charge stored in C2C_2 is:

Ratio=Q1Q2=24μC36μC=23\text{Ratio} = \frac{Q_1}{Q_2} = \frac{24 \, \mu C}{36 \, \mu C} = \frac{2}{3}

Conclusion:

The correct ratio of the charge stored in C1C_1 to C2C_2 is 12\frac{1}{2}.