Question

If the switch remains closed for a long time and then is opened at t = 0 then which option in List-I is matched correctly with List-II at that instant ?

• A. $\frac{6V}{7}$
• B. $\frac{3V}{2}$
• C. $\frac{V}{4R}$
• D. $\frac{V}{R}$
• E. Zero
• F. $\frac{LV^2}{32R^2}$

Answer 1

Answer: (B)

$\frac{3V}{2}$

Answer 2

The correct matches are:

• (I) Current in inductor: $\frac{V}{4R}$

• (II) Voltage across inductor: Magnitude is $\frac{3V}{2}$

• (III) Current supplied by battery: Zero

• (IV) Energy stored in the inductor: $\frac{LV^2}{32R^2}$

Therefore, the correct match is (II) Voltage across inductor: Magnitude is $\frac{3V}{2}$.