1
GATE ECE 2016 Set 2
+1
-0.3
The switch has been in position 1for a long time and abruptly changes to position 2 at t = 0. If time t is in seconds, the capacitor voltage VC (in volts) for t>0 is given by
A
4(1 - exp(-t/0.5))
B
10 - 6exp(-t/0.5)
C
4(1 - exp(-t/0.6))
D
10 - 6exp(-t/0.6)
2
GATE ECE 2015 Set 1
+1
-0.3
In the circuit shown, the switch SW is thrown from position A to position B at time t = 0. The energy (in $$\mu J$$) taken from the 3V source to charge the 0.1$$\mu$$F capacitor from 0V to 3V is
A
0.3
B
0.45
C
0.9
D
3
3
GATE ECE 2014 Set 3
+1
-0.3
A series RC circuit is connected to a DC voltage source at time t = 0. The relation between the source voltage VS, the resistance R, the capacitance C, and the current i(t) is given below: $$V_{s\;}=\;Ri(t)+\frac1c\int_0^ti(u)du$$\$ Which one of the following represents the current f(t)?
A
B
C
D
4
GATE ECE 2014 Set 2
Numerical
+1
-0
In the figure shown, the ideal switch has been open for a long time. If it is closed at t=0, then the magnitude of the current (in mA) through the $$4k\Omega$$ resistor at t = 0+ is _______.