The two coils shown in the diagram are wrapped around an iron bar. After the swi

Question

The two coils shown in the diagram are wrapped around an iron bar. After the switch is closed..

a. a current momentarily flows through R from left to right

b. a steady current flows through R from left to right

c. a current momentarily flows through R from right to left

d. a steady current flows through R from right to left

e. no current flows through R

The two coils shown in the diagram are wrapped around an iron bar. After the switch is closed.. a. a current momentarily flows through R from left to right b. a steady current flows through R from left to right c. a current momentarily flows through R from right to left d. a steady current flows through R from right to left e. no current flows through R

Explanation / Answer

b. a steady current flows through R from left to right

Initially, there is no magnetic field through the secondary coil (the coil connect to the resistor). After the switch is closed, current flows through the primary coil and a magnetic field is produced through both coils.Then current flows from left to right.

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