SSLC (English Medium) कक्षा १० - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

The refractive index of a transparent medium is always greater than ______.

Assertion and reasoning type

1. Assertion: If the refractive index of the medium is high (denser medium) the velocity of the light in that medium will be small
2. Reason: Refractive index of the medium is inversely proportional to the velocity of the light

What is refractive index?

If a substance is heated or cooled, the change in mass of that substance is

Temperature is the average ______ of the molecules of a substance.

The temperature and heat are ______ quantities.

One calorie is the amount of heat energy required to raise the temperature of _______ of water through ______.

Thermal energy always flows from a system at higher temperature to a system at lower temperature.

Distinguish between linear, arial, and superficial expansion.

Find the final temperature of a copper rod. Whose area of cross-section changes from 10 m² to 11 m² due to heating. The copper rod is initially kept at 90K. (Coefficient of superficial expansion is 0.0021 /K)

If you keep ice at 0° C and water at 0° C in either of your hands, in which hand you will feel more chillness? Why?

Kilowatt hour is the unit of

The power of an electric device is a product of ______ and ______.

MCB is used to protect household electrical appliances.

The SI unit for electric current is the coulomb.

One unit of electrical energy consumed is equal to 1000 kilowatt-hour.

Match the items in column-I to the items in column-II:

Name any two devices, which are working on the heating effect of the electric current.

1. What is meant by electric current?
2. Name and define its unit.
3. Which instrument is used to measure the electric current? How should it be connected in a circuit?

Man-made radioactivity is also known as _______.