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

Why do antiseptics differ from disinfectants? Give one example of each.

1 metric ton is equal to ______.

Which among the following is not a device to measure mass?

1 kg of rice is weighed by ______.

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

In everyday life, we use the term weight instead of mass.

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

A physical balance is more sensitive than a beam balance.

Assertion(A): The scientifically correct expression is “ The mass of the bag is 10 kg”

Reason (R): In everyday life, we use the term weight instead of mass.

Numerical Problem.

Find the mass of an object weighing 98 N

Negative acceleration is called ______.

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

Acceleration can get negative value also.

Assertion: The accelerated motion of an object may be due to change in magnitude of velocity or direction or both of them.

Reason: Acceleration can be produced only by change in magnitude of the velocity. It does not depend the direction.

What do you understand about negative acceleration?

Exercise Problem.

A racing car has a uniform acceleration of 4 ms–2. What distance it covers in 10 s after the start?

State Pascal’s law.

Assertion: Pascal’s law is the working principle of a hydraulic lift.

Reason: Pressure is thrust per unit area.

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

Ammeter is connected in parallel in any electric circuit.

______ is used as reflectors in torchlight.

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

When an object is at the centre of curvature of concave mirror the image formed will be virtual and erect.

The radius of curvature of a concave mirror whose focal length is 5cm is ______

Large ______ mirrors are used to concentrate sunlight to produce heat in solar furnaces.