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

Units are named after scientists ______.

What are the kinds of units?

Give some examples of fundamental units.

What is the standard unit of weight?

What is the measuring unit of the thickness of a plastic carry bag?

What are the factors determining liquid pressure?

For an isolated positive charge the electric lines of force are radial ______ and for an isolated negative charge they are radial ______.

______ at a point is a measure of force acting on a unit positive charge placed at that point.

Explain why the ozone layer is not affected by solar wind.

The magnetic field produced due to a circular wire at its center is ______.

A magnetic field exerts no force on ______.

The magnetic field inside a ______ is uniform. 

A magnetic field is a ______ quantity.

The ______ produces its own magnetic field, which shields the earth’s ozone layer from the ______ and is important in navigation.

The magnetic field at a point is ______ to the magnetic field lines.

No force acts in a current-carrying conductor when it is ______ to the magnetic field.

A current flowing in a wire gives rise to a magnetic field.

The magnetic field lines due to a straight wire carrying current are parallel.

The magnetic field is a quantity that has magnitude only.

Magnetic fields do not interact with electric charges in motion.