Question

2 conducting circular loops F and G are kept in a plane on either side of a straight current carrying wire as shown in the figure
If the current in the wire decrease in magnitude , then the induced current in the loop will be
A) Clockwise in F and clockwise in G
B) Anticlockwise in F and clockwise in G
C) Clockwise in F and anticlockwise in G
D) Anticlockwise in f and anticlockwise in G​

Answer 1

Answer:

Since the 'dot' field is decreasing hence the induced magnetic field is'dot',i.e. Out of the page and by the right-hand rule the induced current is counter clockwise.

Answer 2

The direction of induced current in F is anticlockwise and that in G is clockwise.

(B) is correct option.

Explanation:

When we determine the direction of induced current then we use to right hand rule.

Right hand thumb rule :

In this rule, The middle finger shows the induced current with in the conductor, Thumb shows the direction of the motion of the conductor and the index finger shows the direction of magnetic field.

According to figure,

Using the right hand thumb rule, it can be seen that the flux of electric field goes inside the plane of paper in circular loop G and outside the plane of paper in circular loop F.

As the current in the wire decreases, the induced current will try to oppose the change in flux as per lenz law.

Hence, The direction of induced current in F is anticlockwise and that in G is clockwise.

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Topic : right hand rule

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