Thomson coefficient of a conductor is 10 µV/K. Its two ends are kept
Thomson coefficient of a conductor is 10 µV/K. Its two ends are kept at 50° C and 60° C. Amount of heat absorbed by the conductor when a charge of 10C flows through it is […]
Magnetic Effects of Current and Magnetism
The time period of bar magnet is doubled when magnetic field is reduced
The time period of bar magnet is doubled when magnetic field is reduced by same amount. If initial magnetic field is 0.4 x 10⁻⁴ T then find out decrease in the magnetic field
Options […]
The work done in rotating a magnetic of magnetic moment 2 A-m² in
The work done in rotating a magnetic of magnetic moment 2 A-m² in a magnetic field of 5 x 10³ T from the direction along the magnetic field to opposite direction in the magnetic field […]
The time period of a thin bar magnet in Earth’s magnetic field is T
The time period of a thin bar magnet in Earth’s magnetic field is T. If the magnet is cut into two equal parts perpendicular to its length, the time period of each part in the […]
The current in the windings of a toroid is 2.0 A. There are 400 turns
The current in the windings of a toroid is 2.0 A. There are 400 turns and the mean circumferential length is 40 cm. If the inside magnetic field is 1.0 T, the relative permeability is […]
A magnet of length 10 cm and magnetic moment 1 A-m² is placed
A magnet of length 10 cm and magnetic moment 1 A-m² is placed along the side AB of an equilateral triangle ABC. If length of side AB is 10 cm the magnetic induction at the […]
The angular momentum of an electron is J. The magnitude of the magnetic moment
The angular momentum of an electron is J. The magnitude of the magnetic moment will be
Options
(a) eJ / m (b) (eJ) / (2m) (c) 2meJ (d) (2m) / (eJ)
Correct Answer: […]