Magnetic field due to current Questions

A current loop in a magnetic field :-

A bar magnet of length ′l′ and magnetic dipole moment ′M′ is bent in the form of an arc as shown in figure. The new magnetic dipole moment will be...

When a proton is released from rest in a room, it starts with an initial acceleration a0 towards west. When it is projected towards north with a speed v0 it moves with an initial acceleration 3a0 towa...

Two similar coils of radius R are lying concentrically with their planes at right angles to each other. Thecurrents flowing in them are I and 2I, respectively. The resultant magnetic field induction a...

A non planer loop of conduction wire carrying a current along I is placed as shown in the figure. Each of the staright sections of the loop is length 2a. The magnetic field due to this loop at the poi...

A conductor lies along the z-axis at -1.5 ≤ z direction(see figure). For a field = 3.0 × 10-4e-0.2x T, find the power required to move the conductor at constant speed to x = 2.0 m, y = 0 m ...

Following figures show the arrangement of bar magnets in different configurations. Each magnet has magnetic dipole moment . Which configuration has highest net magnetic dipole moment? a. b. c. d....

Two identical long conducting wires AOB and COD are placed at right angle to each other, with one above other such that O is their common point for the two. The wires carry I1 and I2 currents, respect...

A thin semicircular conducting ring (PQR) of radius r is falling with its plane vertical in a horizontal magnetic field B, as shown in figure. The potential difference developed across the ring when i...

Match the following :-(i) Magnetic flux (a) tesla(ii) Magnetic flux density (b) weber(iii) Relative permeability (c) no unit(iv) Magnetic field intensity (d) ampere/meter...

A circular coil placed in a uniform magnetic field. If alternating current flows through this coil then :-

An electron moving in a circular orbit of radius r makes n rotations per second. The magnetic field produced at the center has magnitude :

A wire carrying current I has the shape as shown in adjoining figure. Linear parts of the wire are very long and parallel to X-axis while semicircular portion of radius R is lying in Y-Z plane. Magnet...

n an electromagnetic wave in free space the root mean square value of the electric field is Erms = 6V/m. The peak value of the magnetic field is :-

A 250-Turn rectangular coil of length 2.1 cm and width 1.25 cm carries a current of 85 μA and subjected to magnetic field of strength 0.85 T. Work done for rotating the coil by 180∘ against...

A long straight wire of radius a carries a steady current I. the current is uniformly distributed over its cross-section. The ratio of the magnetic fields B and B′, at radial distances a/2 and 2...

A long solenoid has 1000 turns. When a current of 4A flows through it the magnetic flux linked with each turn of the solenoid is 4 × 10-3 Wb. The self-inductance of the solenoid is:...

The dipole moment of a circular loop carrying a current I, is m and the magnetic field at the centre of the loop is B1. When the dipole moment is doubled by keeping the current constant, the magnetic ...

A metallic rod of mass per unit len gth 0.5 kg m–1 is lying horizontally on a smooth inclined plane which makes an angle of 30° with the horizontal. The rod is not allowed to slide down by f...

A steady current I flows along an infinitely long hollow cylindrical conductor of radius R. This cylinderis placed coaxially inside an infinite solenoid of radius 2R. The solenoid has n turns per unit...