Magnetic Field Due to electric Current Mock Test (Physics) MHT CET 2021

A current carrying loop is placed in a uniform magnetic field. The Torque acting on it does not depend upon the

A triangular loop of side l carries a current I. It is placed in a magnetic field B such that plane of the loop is in direction of B . The torque on loop is

A rectangular coil of 500 turns with an average area per turn  4,00cm² carries a current of 0.2 A. The coil is placed at an angle of 60° with the direction of magnetic induction of 10-³ Wb/m². The torque acting on the coil is

Two long parallel wires are at a distance of 4cm. They carry currents I and 3I in same direction. Where will the field produced by both wires be zero from current I?

A wire carrying current I and other carrying 2I in same direction produce magnetic field at the mid-point. What will be the field , when 2I wires is switched off ?

A current I is flowing in a straight conductor of length L. The magnetic Induction at a point distance L/4 from its centre will be

Two infinite length wires carry currents 8A and 6A are placed along X-axis  and Y-axis respectively. Magnetic field at a point P(0,0,d)m will be

Three long straight wires of length L are connected parallel to each other across a battery of negligible internal resistance. The ratio of their resistances are 3:4:5. What is the ratio of distances of middle wire from the others if the net force experienced by it is zero ?

If the current flowing in ABCD is I . then the field at P as shown in figure will be (Options are as A,B,C,D )

Two circular coils are made of two identical wires of same length. If the number of turns of coils are 4 nd 2 then the ratio of magnetic induction at centre will be

Two concentric coils of 10 turns each are placed in same plane. Their radii are 20cm and 40cm and carry 0.2 ampere and 0.3 ampere current respectively in opposite directions. The magnetic induction (in tesla) at their centre is  7/4μ

A magnetic field due to current carrying circular loop of radius 6cm at a point on the axis at a distance of 8cm from the centre is 108μT. What will be value at the centre of loop ?

A winding wire which is used to frame a solenoid is 80cm and its cross sectional radius is 3cm , then required length of winding wire is (B= 0.2 T)

Two electrons move parallel to each other with equal speed v. The ratio of magnetic and electrostatic forces between them is

Two particles X and Y having equal charges after being accelerated through same potential difference enter a region of uniform magnetic field and describe circular paths of radii “r1” and “r2” respectively, The ratio of mass X to that of Y is

A current loop in a magnetic field :

A circular coil having N turns and radius r carries a current. It is held in the XZ plane in a magnetic field B Î. The torque on the coil due to magnetic field is

If same current ‘I’ is flowing through two parallel wires, separated by the distance ‘b’ in air, then force acting per unit length of wires will be (μ(0)=”permeability of free space”)

A conducting wire carrying current is arranged as shown. The magnetic field at ‘O’

A circular coil carrying current ‘I’ has radius ‘R’ and magnetic field at the centre is ‘B’ . At what distance from the centre along the axis of the same coil, the magnetic field will be B/8 ?

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

Two current carrying coils have radii r and 2r and have same magnetic induction at their centres . The ratio of voltage applied across them is