Question

Ratio of reading of ammeter at t = 0 (when switch is closed) to t =  (long time after switch is closed) –

• A. 2 : 1
• B. 1 : 2
• C. 1 : 1
• D. 0

Answer 1

Answer: (A)

2 : 1

Answer 2

At t = 0 (capacitor acts as short circuit. Hence all current will flow through the capacitor part.

I_{t = 0} = $\frac { 10 } { 5 }$ = 2A

At t =  (capacitor acts as open circuit)

I_{t = } = $\frac { 10 } { 10 }$ = 1A