Question

Select the correct answer

1- The current i through an inductor cannot change abruptly. The rate of change di/dt also cannot change abruptly. Both quantities must always be continuous. (True/ FALSE)

2- When a steady current flows through an inductor, there is no energy flow in or out of the inductor. (True/ FALSE ).

3- Long after an emf has been connected to an RL circuit and the current has stabilized, the voltage across the inductor is (Zero / None Zero)

4- When the current through an inductor increases, energy is (stored within / released from) the inductor. When the current decreases, energy is (stored within/ released from) the inductor.

5-The ballast used for a fluorescence tube keeps the current from growing unacceptably large (True/ False).

6-If you increase the inductance in an RL circuit, it takes __________ for the current to reach its final value. (More time/ Less time).

7-The voltage across an inductor is proportional to what? (The current through it /  The derivative in time of the current through it / The integral in time of the current through it).

8-If you increase the resistance in an RL, it takes ______________ for the current to reach its final value. (more time/ less time).

9- Immediately after an emf is connected to an RL circuit, the current through the inductor is ___________.(zero/ nonzero)

10- The final (steady state) current through a circuit containing a source of emf, a resistor, and an inductor does not depend of the value of the inductance. (True / false)

11- If the current doubles in an ideal solenoid, what happens to its magnetic energy density? (It is halved /  It is doubled/ It is quadrupled /It is quartered).

Answer 1

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