Case Based Questions (MCQ)

Class 10
Chapter 13 Class 10 - Magnetic Effects of Electric Current

## (iv) Due to pressure of magnetic field.

The iron filings align themselves in a circular pattern along the magnetic in a circular pattern. This is due to the force exerted by the magnet within its magnetic field.

So, the correct answer is (iii)

## (iv) Gravitational force.

The iron filings align themselves in a circular pattern along the magnetic in a circular pattern and these lines represent the magnetic field lines.

So, the correct answer is (iii)

## (iv) The significance of polarity

The stronger the magnetic field , the closer the field lines are to each other.

Magnetic field lines are crowded towards the poles because the magnetic field is stronger near the poles.

So, the correct answer is (i)

## (iv) North and south poles are closer.

The stronger the magnetic field , the closer the field lines are to each other.

So, the correct answer is (ii)

## (iv) No unit

The SI unit of magnetic field is tesla.

So, the correct answer is (iii)

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