Which circuit element(s) will oppose the change in circuit current ?

Related Mcqs:

1. Which of the following circuit elements will oppose the change in circuit current ?

   A. Capacitance
   B. Inductance
   C. Resistance
   D. All of the above

2. The law that the induced e.m.f. and current always oppose the cause producing them is due to____________?

   A. Faraday
   B. Lenz
   C. Newton
   D. Coulomb

3. Which of the following circuit element stores energy in the electromagnetic field ?

   A. Inductance
   B. Condenser
   C. Variable resistor
   D. Resistance

4. The self-inductance of the coil may be defined as equal to the e.m.f. induced in volts when the current in the circuit changes at the rate of unit Weber turns

   A. Yes
   B. No

5. An average voltage of 10 V is induced in a 250 turns solenoid as a result of a change in flux which occurs in 0.5 second. The total flux change is____________?

   A. 20 Wb
   B. 2 Wb
   C. 0.2 Wb
   D. 0.02 Wb

6. An e.m.f. of 16 volts is induced in a coil of inductance 4H. The rate of change of current must be______________?

   A. 64 A/s
   B. 32 A/s
   C. 16 A/s
   D. 4 A/s

7. An electric current induced within the body of a conductor when that conductor either moves through a non uniform magnetic field or in a region where there is a change in magnetic flux is called_____________?

   A. Induced current
   B. Eddy current
   C. Back emf
   D. None of the above

8. For a purely inductive circuit which of the following is true ?

   A. Apparent power is zero
   B. Relative power is.zero
   C. Actual power of the circuit is zero
   D. Any capacitance even if present in the circuit will not be charged

9. emf induced in a circuit according to Faradays law depends on the_____________?

   A. maximum magnetic flux
   B. rate of change of magnetic flux
   C. change in magnetic flux
   D. initial magnetic flux

10. Inductors acts as a short circuit for_______________?

    A. AC
    B. DC
    C. Both A and B
    D. none of these