Force On A Conductor Carrying Current In A Magnetic Field - Practice Questions & MCQ

 A wire carrying current I is tied between points P and Q and is in the shape of a circular arch of radius R due to a uniform magnetic field B (perpendicular to the plane of the paper, shown by xxx) in the vicinity of the wire. If the wire subtends an angle    at the centre of the circle (of which it forms an arch) then the tension in the wire is :

A conductor lies along the Z-axis at    and carries a fixed current of 10.0 A in  - direction (see figure).

for a field    T ,Find the power required to move the conductor at constant speed to x=2.0 m,

y = 0 m in Assume parallel motion along the x-axis.

A uniform magnetic field    exists in region of space. A semicircular wire of radius 1 m carrying current 1 A having its centre at (2,2,0) is placed in x-y plane as shown in fig. The force on semicircular wire will be

In the figure shown a current is established in the long straight wire AB. Another wire CD carrying current is placed in the plane of the paper. The line joining the ends of this wire is perpendicular to the wire AB. The resultant force on the wire CD is:

Two parallel wires carry currents of 10 A and 40 A in opposite directions. Another wire carrying a current antiparallel to 10 A is placed midway between the two wires. The magnetic force on it will be.

Two long parallel wires separated by a distance R have equal current I flowing in each. The magnetic field of one exerts a force F on the other. The distance R is increased to 2 R and the current in each wire is reduced from I to I / 2. What is the force between them now?

A straight horizontal conducting rod of the length   and mass    is suspended by two vertical wires at its end. A current of 5.0 A is set up in the rod through the wires. what magnetic field should be set up normally to the conductor so that the tension in the wires is zero? Ignore the mass of the wires and take  

A power line lies along the east-west direction and carries a current of   The force per meter due to the earth's magnetic field of   is:

A rectangular loop PQRS carrying a current i is situated near a long straight wire AB. If a steady current I is passed through AB as shown in Fig., the loop will

Two very long parallel wires, separated by a distance d, carry equal current I in the same direction. At a certain instant of time, a point charge q is at a point P which is equidistant from the two wires, in the plane containing the two wires. If v is the velocity of the charge at this instant is perpendicular to this plane, the force due to the magnetic field at P will.