Archives

The units of magnetic pole strength and magnetic dipole moment of a bar magnet are

The units of magnetic pole strength is (A-m) and magnetic dipole moment of a bar magnet is (JT-1)... View Article

A current carrying conductor placed in magnetic field experiences a force. The displacement of the conductor in magnetic field can be increased by

The amount of force experienced by a current carrying conductor placed in a magnetic field depends on (i) the current in the conductor (ii) the... View Article

When a positive charge is moved in an electrostatic field from a point at high potential to a low potential, its kinetic energy

As a positive charge moves down the potential gradient, its kinetic energy increases.... View Article

The direction of the equipotential surface is __________ to the uniform electric field lines.

The direction of the equipotential surface is perpendicular to the uniform electric field lines. Any surface having the same electric potential... View Article

Magnetic Declination is the angle between ______

Magnetic Declination is the angle between magnetic north and true north. The parameters describing the magnetic field's direction are... View Article

Three capacitors of capacitances 3 μF are available. The minimum and maximum capacitances, which may be obtained, are

When three capacitors connected in series then the capacitance is minimum.When three capacitors connected in parallel then the capacitance is maximum.... View Article

If we place a bar magnet in the magnetic meridian with its north pole towards geographic north, the neutral point will be:

If we place a bar magnet in the magnetic meridian with its north pole towards geographic north, the neutral point will be on the equatorial line... View Article

If we keep two similar loops made up of copper and constantan in a magnetic field for same amount of time, in which loop the induced e.m.f will be greater.

As the copper has high electrical conductivity. Hence, higher e.m.f would be induced in copper loop.... View Article

The extent of polarization depends on

The extent of polarization depends on the relative strength of two mutually opposite factors: the dipole potential energy in the external field... View Article

What is the angle of dip at a place where horizontal component of earth’s magnetic field is equal to the vertical component?

The angle of dip at a place where horizontal component of earth's magnetic field is equal to the vertical component is 45o.... View Article

If a diamagnetic substance is brought near north or south pole of a bar magnet, it is

If a diamagnetic substance is brought near north or south pole of a bar magnet, it is repelled by the pole. This happens because diamagnetic... View Article

When a wire loop is rotated in a magnetic field, the direction of induced emf changes once in each

Flux of the magnetic field through the loop ϕ=B.Acosωt Emf= −dϕ/dt=B.Aωsinωt ωt=0toπ, sinωt=+ve ωt=πto2π, sinωt=−ve Hence, the direction of... View Article

A copper rod moves parallel to the horizontal direction. The induced emf developed across its ends due earth’s magnetic field will be maximum at the

At the poles of the copper rod, the earth's magnetic field will be more. This is explained with the help of Lorentz force where he explains that... View Article

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Archives

The units of magnetic pole strength and magnetic dipole moment of a bar magnet are

A current carrying conductor placed in magnetic field experiences a force. The displacement of the conductor in magnetic field can be increased by

When a positive charge is moved in an electrostatic field from a point at high potential to a low potential, its kinetic energy

The direction of the equipotential surface is __________ to the uniform electric field lines.

Magnetic Declination is the angle between ______

Three capacitors of capacitances 3 μF are available. The minimum and maximum capacitances, which may be obtained, are

If we place a bar magnet in the magnetic meridian with its north pole towards geographic north, the neutral point will be:

If we keep two similar loops made up of copper and constantan in a magnetic field for same amount of time, in which loop the induced e.m.f will be greater.

The extent of polarization depends on

What is the angle of dip at a place where horizontal component of earth’s magnetic field is equal to the vertical component?

If a diamagnetic substance is brought near north or south pole of a bar magnet, it is

When a wire loop is rotated in a magnetic field, the direction of induced emf changes once in each

A copper rod moves parallel to the horizontal direction. The induced emf developed across its ends due earth’s magnetic field will be maximum at the

Perpendicular Bisector

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