Question

A galvanometer with a shunt in parallel is used in series in a circuit. Then it is called:
A) Ammeter
B) Voltmeter
C) Ohmmeter
D) Multimeter

Answer 1

Hint: The shunt is an electronic device which permits electric current to pass around through another point in the circuit by generating a low resistance path.

Complete step by step answer:
The galvanometer is an electromechanical instrument which is used for determining and denoting an electric current. The galvanometer works as a controller, by creating a rotary deviation in reaction to electric current moving through a coil in a constant magnetic field.

Seeing that the Galvanometer is a very delicate instrument it cannot evaluate larger currents. So as to convert a Galvanometer into an Ammeter, a very small amount of resistance known as the "shunt" resistance is connected to the Galvanometer. The value of shunt resistance is modified so that most of the current passes through the shunt. The Galvanometer is converted into Ammeter by connecting the shunt resistance parallel in a circuit of series connection. Since the Galvanometer cannot measure larger currents, the galvanometer is converted into ammeter using the shunt resistor to measure the larger voltage.

Therefore, the galvanometer with shunt connected parallel in a circuit of series connection is called ammeter.

Hence, the option (A) ammeter is the right answer.

Note: The application of galvanometer is used in stationing and control systems. The application of galvanometer is divided into moving magnet galvanometer and moving coil galvanometers. In addition to these types, they are further divided into closed loop type and open loop type or resonant types.