When a switch is closed to complete a DC series RL circuit, a. ...

[penza]

When a switch is closed to complete a DC series RL circuit,
 a. the electric field in the wires increases to a maximum value. b. the magnetic field outside the wires increases to a maximum value. c. the rate of change of the electric and magnetic fields is greatest at the instant when the switch is closed. d. all of the above are true. e. only (a) and (c) above are true.

Question 2

An inductor produces a back emf in a DC series RL circuit when a switch connecting the battery to the circuit is closed. We can explain this by
 a. Lenz's law.
  b. increasing magnetic flux within the coils of the inductor.
  c. increasing current in the coils of the inductor.
  d. all of the above. e. only (a) and (c) above.

[yuyiding]

Answer to Question 1

D

Answer to Question 2

D

[penza]

TYSM

[xiaomengxian]

Gracias!