SSLC (English Medium) Class 9 - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

Clean and Fresh water is essential for every human activity.

Nicobar island is one of the biodiversity hotspots in India.

Point out the importance of water conservation.

What is grey water?

What are all the strategies used to support water conservation?

Two spheres have mass and volume in the ratio 2:1. The ratio of their density is ______.

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

One Celsius degree is an interval of 1K and zero degree Celsius is 273.15 K.

Assertion (A): 0 °C = 273.16 K. For our convenience we take it as 273 K after rounding off the decimal.

Reason (R): To convert a temperature on the Celsius scale we have to add 273 to the given temperature.

The area under velocity – time graph represents the ______

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

The velocity – time graph of a particle falling freely under gravity would be a straight line parallel to the x axis.

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

If the velocity – time graph of a particle is a straight line inclined to X-axis then its displacement – time graph will be a straight line.

Numerical Problem.

The density of water is 1 g cm–3. What is its density in S.I. units?

The part of the AC generator that passes the current from the armature coil to the external circuit is ______.

A device for producing electric current is ______.

Draw and label the diagram of an AC generator.

Draw a neat diagram of an AC generator and explain its working.

SI unit of temperature is ______.

Assertion: When water is heated up to 100°C, there is no raise in temperature until all water gets converted into water vapour.

Reason: Boiling point of water is 10°C.

Why do people prefer wearing white clothes during summer?

Define thermal capacity.