SSLC (English Medium) इयत्ता ९ - Tamil Nadu Board of Secondary Education Question Bank Solutions

A magnetic field is a ______ quantity.

The ______ produces its own magnetic field, which shields the earth’s ozone layer from the ______ and is important in navigation.

The magnetic field at a point is ______ to the magnetic field lines.

No force acts in a current-carrying conductor when it is ______ to the magnetic field.

A current flowing in a wire gives rise to a magnetic field.

The magnetic field lines due to a straight wire carrying current are parallel.

The magnetic field is a quantity that has magnitude only.

Magnetic fields do not interact with electric charges in motion.

The force on a charged particle moving in a magnetic field is maximum when the angle between the direction of motion and field is 90°.

The field at the center of the long circular coil carrying current will be parallel straight lines.

Assertion (A): The work done by a magnetic field on a moving charge is zero.
Reason (R): In a magnetic field force is perpendicular to the velocity.

Define magnetic shielding.

If the angle of incidence i = 0, the angle of reflection r = ______.

How should a ray of light be incident on a rectangular glass slab so that it comes out from the opposite side of the slab without being displaced?

Higher-Order Thinking Skills:

Are the laws of reflection true in the case of irregular reflection?

Which of the following is a non-mechanical wave?

Rarefactions are the regions of ______ where particles are spread apart.

The small to and fro motion is called vibration.

A substance must absorb ______ so that it can melt.

How are pure substances classified?