Explanation: Examine the equation, the same current flows through R & C. Also when switch is open, the equation R.H.S is 0. Hence, all the elements are in series. 3. A circuit is so formed such that the source-R-C-diode-switch are in series. Consider the initial voltage across the C to be zero. The diode is so connected that it is forward biased when the switch is closed. When the switch is closed,
A. the current will decay exponentially & the voltage will increase exponentially
B. the current will increase exponentially & the voltage will increase exponentially
C. the current will fall to zero & the voltage both will decay exponentially
D. the voltage and current both remain constant
Answer:A
Explanation: Examine the equation, the same current flows through R & C. Also when switch is open, the equation R.H.S is 0. Hence, all the elements are in series. 3. A circuit is so formed such that the source-R-C-diode-switch are in series. Consider the initial voltage across the C to be zero. The diode is so connected that it is forward biased when the switch is closed. When the switch is closed,
A. the current will decay exponentially & the voltage will increase exponentially B. the current will increase exponentially & the voltage will increase exponentially C. the current will fall to zero & the voltage both will decay exponentially D. the voltage and current both remain constant
Explanation: Instant switch is closed, the current is maximum Vs/R than starts to reduce, whereas voltage starts to increase from 0 to Vs (Capacitor Charging). 4. The time constant of a series RC circuit (τ) is given by