Sound waves having frequency higher than 20,000 Hz are called:

A positive electric charge:

An object gains excess negative charge after being rubbed against another object, which is:

Sound waves having frequency lower than 20 Hz are called:

At room temperature, electrons cannot escape the metal surface due to ………….. of atomic nucleus:

The 1st practical electric battery is known as:

What should household appliances be connected in parallel with the voltage source?

The equivalent resistance of a parallel combination is

The combined resistance of two identical resistors, connected in series is 8Ω. Their combined resistance in a parallel arrangement will be:

What is the power rating of a lamp connected to a 12 v source when it carries 2.5 A?

The S.I unit of potential difference is:

Which gate is used for safety alarm: