In the figure, two solenoids are approaching each other speed as shown. The indu
ID: 1606480 • Letter: I
Question
In the figure, two solenoids are approaching each other speed as shown. The induced current through the resistor R is A) from b to a. B) from a to b. C) There is no induced current through the resistor. Which of the following statements about inductors is correct? A) When an inductor and a resistor are connected in series with a DC battery, the current in the circuit is zero after a very long time. B) When an inductor and a resistor are connected in series with a DC battery, the current in the circuit is reduced to zero in one time constant. C) When it is connected in a circuit, an inductor always resists having current flow through it. D) An inductor always resists any change in the current through it. E) Inductors store energy by building up charge.Explanation / Answer
8)
According to lenz law, the direction of the induced emf or current oppose the cause of it. So when the left coil moves to the right and the field is to the right due to the current flow in the primary coil the induced field which oppose should be opposite so it would be from a to b
9)
A) When an indcutor and a resistor are connected in series with a DC battery, the current in the circuit is zero after a very long time
False because the current is never zero but tends to zero.
B) When an inductor and a resistor are connected in series with a DC battery, the current in the circuit is reduced to zero in one time constant
False, in one cycle current reduced to 34%. so it cannot be zero.
C) When it is connected in a circuit, an inductor always resists having current flow through it
False, the property of inductor is to oppose the cause but not current flow. resistor oppose the flow of current.
D) An indcutor always resists any change in the current through it
True, It always opposes the cause of it according to Lenz law. Either growth or decay, inductor opposes the cause.
E) Inductors store energy by building up charge.
False, It stores when current rises and discharge when current decays
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.