The force experienced by a unit positive test charge placed at a point is called

Which one of the following is the value of current I in the circuit shown above?

Which one of the following is not electromagnetic in nature?

Propagation of light quanta may be described by

Consider the following parts of spectra

1. Visible
2. infrared
3. Ultraviolet
4. Microwave

Which one of the following is the correct sequence in which their wavelengths increase?

The electric charge is stored in a device called