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

What is food spoilage? What are the factors responsible for food spoilage?

Among the following, which belongs to water-borne diseases? 

Expand the following:

HAV – 

Radius of a thin wire is measured by ______.

Match the following.

What do you know about pitch of screw gauge?

How will you find the thickness of a one rupee coin?

The centrifugal force is ______.

State whether true or false. If false, correct the statement.

In a step down transformer the number of turns in primary coil is greater than that of the number of turns in the secondary coil.

Differentiate step up and step down transformer.

A portable radio has a built in transformer so that it can work from the mains instead of batteries. Is this a step up or step down transformer? Give reason.

Explain two types of transformer.

The speed of light is maximum in ______.

What is the speed of light in vacuum?

Numerical problem.

Light enters from air into a glass plate having refractive index 1.5. What is the speed of light in glass? (Ans: 2 × 10⁸ ms^–1)

Higher Order Thinking Skills. 

Light ray emerges from water into air. Draw a ray diagram indicating the change in its path in water.

Higher Order Thinking Skill.

What do you conclude about the speed of light in diamond. if the refractive index of diamond is 2.41?

In petroleum refining, the method of separation used is ______.

The legal measures to prevent plastic pollution come under the ______ Protection Act 1988.

This type of food protect us from deficiency diseases.