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

In a 100m race, the winner takes 10s to reach the finishing point. The average speed of the winner is ______.

______ measures the instantaneous speed of the automobile.

Assertion: The speed of a body can be Negative.
Reason: If the body is moving in the opposite direction of positive motion, then its speed is Negative.

A car starting from rest moves with a uniform acceleration of 0.2 ms-2 for 3 min. Find the

1. speed acquired 
2. the distance traveled.

Abus from Chennai travels to Trichy passes loo km, 160 km at 10.15 am, 11.15 am respectively. Find the average speed of the bus during 10.15 – 11.15 am.

______ is the instrument used to measure atmospheric pressure.

On each 1 m² of surface, the force acting is ______.

______ is a device for measuring atmospheric pressure without the use of liquids.

The barometer works by balancing the Mercury in the glass tube along with the outside air pressure.

Electrons in outer orbits are called free electrons.

Define the following:

Electromotive force (e.m.f.)

At the center of a magnet, the magnetism is ______.

Assertion (A): A current-carrying conductor experiences a force in a magnetic field.
Reason (R): The net charge on a current-carrying conductor is zero.

What is the concept of temperature?

Give reasons why –

a steam burn is more damaging than a burn caused by boiling water at the same temperature.

Give reasons why –

an igloo is built as a winter shelter

Give reasons why –

gaps are left between railway tracks

Give reasons why –

chimneys are located high up in kitchens and factories

Give reasons why –

we wear woolen clothes in winter

While a substance is undergoing a change of state, the temperature of the body remains ______.