Latest MCQs
Home > MCQs > Physics > Electromagnetism

# Electromagnetism

## An ammeter measures the total current flowing through a circuit when it is connected

A.in series with the circuit
B.in parallel with circuit
C.in series with any of the parallel resistances in the circuit
D.in parallel with any of the series resistances in the circuit

A.BINA cosa
B.BINA sina
C.BINA tana
D.BINA

## A galvanometer basically is an instrument used to

A.detect current in a circuit
B.measure current flowing through a circuit
C.measure voltage across a circuit
D.measure potential difference between two points in a circuit

## The effective way to increase the sensitivity of a moving coil galvanometer is to

A.use a very long and fine suspension
B.use a coil of very large area
C.use a coil with very large number of turns
D.use a very strong magnetic field

## A wheat stone bridge is said to be balanced when

A.maximum current flows through the galvanometer branch
B.minimum current flows through the galvanometer branch
C.potential difference across galvanometer branch is maximum
D.potential difference across galvanometer branch is zero

## When an electron moving with a uniform speed in a vacuum enters a magnetic field in a direction perpendicular to the field the subsequent path of the electron is

A.a straight line parallel to the field
B.a parabola in a plane perpendicular to the field
C.a circle in a plane perpendicular to the field
D.a straight line along its initial direction

## A particle of mass m charge q and speed V enters a uniform magnetic radius r. The radius r of the circle is

A.independent mass m
B.directly proportional to m
C.directly proportional to q
D.directly proportional to B