Question 41 : A coil has a resistance of 4 ohms and an inductance of 2H. It is connected to a 20V dc supply. Calculate the initial value of the voltage across the inductor.
1. 5V
2. 10V
3. 0 V
4. 20V
View Answer   Discuss with Members

Question 42 : The discharging time constant of a circuit consisting of an inductor is the time taken for the voltage in the inductor to become __________ % of the initial voltage.
1. 33
2. 63
3. 37
4. 36
View Answer   Discuss with Members

Question 43 : Among the following, which is the right formula for decay in an inductive circuit?
1. i=I(1-e^-t/time constant)
2. i=I(1-e^t /time constant)
3. i=(1-e^-t /time constant)
4. i=I(e^-t /time constant)
View Answer   Discuss with Members

Question 44 : A coil has a resistance of 4 ohms and an inductance of 2H. It is connected to a 20V dc supply. Calculate the value of voltage 1s after the switch is closed.
1. 5.4V
2. 10.8V
3. 0 V
4. 2.7V
View Answer   Discuss with Members

Question 45 : A coil has a resistance of 4 ohms and an inductance of 2H. It is connected to a 20V dc supply. Calculate the value of current 1s after the switch is closed.
1. 5.44A
2. 4.32A
3. 6.56A
4. 2.34A
View Answer   Discuss with Members

Question 46 : A coil has a resistance of 4 ohms and an inductance of 2H. It is connected to a 20V dc supply. Calculate the final value of the current in the circuit.
1. 5A
2. 10A
3. 15A
4. 20A
View Answer   Discuss with Members

Question 47 : A coil has a resistance of 4 ohms and an inductance of 2H. It is connected to a 20V dc supply. Calculate the initial value of the current in the circuit.
1. 5A
2. 10A
3. 0 A
4. 20A
View Answer   Discuss with Members

Question 48 : What is Helmholtz equation?
1. i=I(e^Rt/L)
2. i=I(1-e^-Rt/L)
3. i=I(1+e^-Rt/L)
4. i=I(e^-Rt/L)
View Answer   Discuss with Members

Question 49 : What is the total applied voltage in an inductive circuit?
1. V=Ri+Ldi/dt
2. V=Ri+di/dt
3. V=i+Ldi/dt
4. V=R+Ldi/dt
View Answer   Discuss with Members

Question 50 : The charging time constant of a circuit consisting of an inductor is the time taken for the current in the inductor to become __________% of the initial current.
1. 33
2. 63
3. 37
4. 36
View Answer   Discuss with Members