Question: Q. 3. What are the directions of induced currents in metal rings 1 and 2 when current $I$ in the wire is increasing steadily?
U] [O.D. Set I, II, III 2017]
Q. 4. Figure shows a current carrying solenoid moving towards a conducting loop. Find the direction of the current induced in the loop.
U] [Delhi I, II, III 2015]
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Solution:
Ans. From an observer, the direction of current in the solenoid is anti-clockwise. On displacing it towards the loop, current in the loop will get induced in a direction in order to oppose the approach of solenoid, hence direction of induced current as seen by the observer will be clockwise. 1
[CBSE Marking Scheme 2015]
[AI Q. 5. A conducting loop is held above a current carrying wire ’ $P Q^{\prime}$ as shown in the figure. Depict the direction of the current induced in the loop when the current in the wire $P Q$ is constantly increasing.
U [OD. I, II, III 2014]
Ans. It is observed that an increasing magnetic field in the loop due to wire $P Q$ is perpendicular to the plane, so the direction of an induced current in the loop will be such that it tends to produce an inward magnetic field making the current induced in the loop in the clockwise direction. 1
[CBSEMarking Scheme 2014]
