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

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?

Is blood a pure substance?

Name some substances that are sublime.

What are the characteristics of Pure Substances? (or) List out the characteristics of Pure Substances.

Noble gases are placed in the ______ group in the modern periodic table.

Group 16 elements are collectively called as ______.

The maximum number of electrons that can be accommodated in s, p,d, and f subshells are ______.

______ group elements are called alkaline earth metals.

Spot the error:

The elements of group 13 are called the carbon family.