# General Science/Basic Science Magnetic Field Sample Test,Sample questions

## Question: `22.The direction of magnetic field is the direction along which`

1.a tiny bar magnet moves

2.an isolated south pole moves

3.an isolated north pole moves

4.a unit positive charge moves

1.East-North

2.North-West

3.North-South

4.South-West

## Question: `A line of force in a magnetic field`

1.is a line joining the poles

2.is a path along which an isolated charge moves

3.is a path along which a short bar magnet moves

4.is a path along which an isolated north pole moves

## Question: `A uniform magnetic field`

1.is produced by a bar magnet

2.is produced by an isolated north pole

3.has parallel flux lines

4.produces no force on a north pole

## Question: `Ampere-meter is the unit of`

1.magnetic moment

2.pole strength

3.electric potential

4.magnetic potential

1.m/d

2.m2/d

3.m/d2

4.m2/d2

## Question: `Force of the attraction between two poles placed in vacuum`

1.decreases as the pole strength increases

2.increases with decrease in distance

3.decreases with decrease in distance

4.increases with decrease in pole strength

## Question: `� indicates the property of`

1.a dielectric

2.a conductor

3.a magnetic material

4.an insulator

1.permittivity

2.permeability

3.conductivity

4.resistivity

1.weber

2.weber/metre2

3.amp-metre

4.amp/metre

1.ML0 T -1

2.LT -1

3.HM -1

4.nil

## Question: `The distance between the poles of a magnet is called`

1.magnetic axis

2.magnetic moments

3.length of the magnet

4.magnetic length

## Question: `The flux density is`

1.a scalar quantity

2.is a vector quantity

3.the magnetic moment per unit volume

4.the dipoles per unit volume

1.mH

2.m/H

3.H/m

4.mWb

## Question: `The intensity of magnetic field is the force acting on`

1.a short bar magnet

2.a long bar magnet

3.a unit north pole

4.a unit south pole

## Question: `The magnetic axis of a magnet is`

1.perpendicular to the length of the magnet

2.along the line joining the poles

3.the direction of zero magnetic flux

4.a line of zero moment

## Question: `The magnetic flux`

1.is a scalar quantity

2.is a vector quantity

3.denotes the amount of the force on a north pole

4.is the magnetic moment of a bar magnet

## Question: `The north pole of the earths magnetic field`

1.is at the centre of the earth

2.lies along the equatorial line

3.lies in the northern hemisphere

4.lies in the southern hemisphere

1.1 H/m

2.0

3.4? ? 10-7 H/m

4.4? ? 107 H/m

## Question: `The ratio of the flux density to the magnetic field strength in a medium is its`

1.intensity of magnetization

2.susceptibility

3.relative permeability

4.permeability

1.? = B/A

2.B = A/?

3.B = ? A

4.B = ?/A

1.�r = �r ? �0

2.� = �0 �r

3.�r = �0 / �

4.� = �0 / �r

1.�0 = H/B

2.B = �0 H

3.H = �0 B

4.�0 = HB

## Question: `The south pole of the earths magnetic field`

1.is at the centre of the earth

2.lies along the equatorial line

3.lies in the northern hemisphere

4.lies in the southern hemisphere

## Question: `The total number of lines of induction crossing any area is known as`

1.magnetic induction

2.magnetic flux

3.magnetic field

4.mutual induction

1.weber/metre2

2.weber/metre

3.ampere-metre2

4.ampere /metre

1.weber

2.tesla

3.weber-metre

4.ampere-metre

1.H

2.Hm

3.H/m

4.Wb

1.Am

2.A/m

3.Wbm

4.Wb/m

1.4? ? 10-7

2.0

3.-1

4.1

## Question: `ttractive force exists between`

1.two south poles

2.two north poles

3.poles of the same magnet

4.one north pole and one south pole

## Question: `When a magnet is dipped in iron filings the fillings`

1.cling throughout the magnet

2.cling to the magnet at the ends only

3.cling to the magnet at its center only

4.do not cling to the magnet

## More MCQS

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