For the arrangement shown below, we want to change the direction in which a (sensitive) magnetic needle gets deflected. How can we achieve this?

Changing the position of A and B.

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Rotating the circuit about AB.

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Reversing the polarity of cell E.

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Changing the strength of cell E.

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Solution

The correct option is C Reversing the polarity of cell E.
The magnetic needle will point in a particular direction near the wire. When the direction of the current is reversed, then the direction of the deflection of magnetic needle also reverses.

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Similar questions

For the arrangement shown below, if we want to change the direction in which the magnetic needle gets deflected, then which of the following can be done?

Q. For the circuit shown below, if we want to change the direction in which the magnetic needle gets deflected, then which of the following can be done?

Q. For the arrangement shown below, if we want to change the direction in which the magnetic needle gets deflected, then which of the following can be done? (Here AB represents a metallic wire and E represents a battery.)

(a) For the arrangement shown below, what should be done to change the direction in which the magnetic needle gets deflected?

(b) What is the pattern of magnetic field around a current carrying conductor? [2 MARKS]

When we bring a magnetic needle near a current carrying conductor it gets deflected. This deflection is an example of:

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For the arrangement shown below, we want to change the direction in which a (sensitive) magnetic needle gets deflected. How can we achieve this?

The correct option is C Reversing the polarity of cell E.The magnetic needle will point in a particular direction near the wire. When the direction of the current is reversed, then the direction of the deflection of magnetic needle also reverses.

The correct option is C Reversing the polarity of cell E.
The magnetic needle will point in a particular direction near the wire. When the direction of the current is reversed, then the direction of the deflection of magnetic needle also reverses.