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

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.

The velocity of sound in solid is ______ than the velocity of sound in air.

Numerical problem.

A stone is dropped from the top of a tower 750 m high into a pond of water at the base of the tower. Calculate the number of seconds for the splash to be heard? (Given g = 10 m s^–2 and speed of sound = 340 m s^–1)

Define orbital velocity.

Write a note on orbital velocity

How is a satellite maintained in nearly circular orbit?

Why are some satellites called geostationary?

Numerical problem.

Calculate the speed with which a satellite moves if it is at a height of 36,000 km from the Earth’s surface and has an orbital period of 24 hr (Take R = 6370 km) [Hint: Convert hr into seconds before doing calculation]

Numerical problem.

At an orbital height of 400 km, find the orbital period of the satellite.

List some of the ways in which you could save water in your home and school.

Name the chronic diseases associated with respiratory system.

The production and management of fish is called ______.

______ is the method of culturing different variety of fish in a water body.