SSLC (English Medium) इयत्ता ८ - Tamil Nadu Board of Secondary Education Question Bank Solutions

Explain series and parallel circuit.

What is electroplating? Explain how it is done.

A wave with a frequency of 500 Hz is traveling at a speed of 200 ms-1. What is the wavelength?

The study about stars and planets are known as _____.

List out the objectives of Mangalyaan.

Match the following.

Mention any four compounds and their uses.

Mention the uses of the following compounds.

1. Baking soda
2. Bleaching powder
3. Quick lime

How does carbon dioxide react with the following?

1. Potassium
2. Lime water
3. Sodium hydroxide

Define the following.

Specific heat capacity

Friction depends on the ______ of two surfaces in contact.

Analogy

Objects placed at rest on earth: ______:: Bodies slide over the surface on other body: ______.

Assertion: Friction always opposes the motion.
Reason: Whenever one surface moves or tries to move over another surface, the force of friction starts acting on the surfaces.

Assertion: We can live very happily if friction is not present in nature.
Reason: The airplane shape is streamlined to reduce the effort of frictional force.

Assertion: There is a danger of a vehicle skidding on a wet road.
Reason: The tires of the vehicle lose their grip on the road due to an increase in friction due to the presence of water on the road.

In dispersion, the color of light that will bend more is ______.

The periscope is an optical device with a polished surface that reflects the light falling on it.

Curved mirrors have surfaces that are spherical, cylindrical, parabolic, and ellipsoid.

Assertion: We can see the rainbow in the sky when the rain starts falling after a spell of bright sunlight.
Reason: The rainbow is formed due to the dispersion of light.

What is a rainbow?