Question

A sensitive electromagnetic instrument used to detect and measure small electric currents (of the order of microamperes to milliamperes) by measuring the deflection of a current-carrying coil placed in a uniform magnetic field is called a:

Options

• Moving Coil Galvanometer (MCG)

• Wheatstone bridge

• Step-down transformer

• Induction coil

Answer 1

A Moving Coil Galvanometer (MCG) detects and measures very small currents (microampere to milliampere range) by observing the angular deflection of a current-carrying coil in a uniform magnetic field. It is the basic sensing element from which ammeters and voltmeters are constructed.