Question

Q7.

i) A solenoid of length 0.5 meter, with winding of 800 turns, uniformly distributed over its length, to

produce a magnetic field of order 2.0 × 10-4 T, at its centre. Discuss the effect and the value of electric

current, if its length increased by two times and put your observation regarding the behaviour of electric

current, if solenoid immersed in a liquid having high relative permeability, give your justifications.

(Given: μ0 = 4π × 10−7 T.m/A).

ii) You are investigating electromagnetic effects using coil and magnets. When a wire of length 20 cm bent into circular current carrying loop which kept in magnetic field 0.2 and 5 A flows through it. Suggest the magnitude of force and rotational force acting on the coil. If this coil is linear, what will be the force? In this experiment, a wire of length 20 cm is bent in the form of a square coil of single turn which carries a current 5 A is placed in a magnetic field of 0.2 T. How can you predict the maximum rotational force experienced by the coil? Compare the effects and predict which coil has more rotational force.

Justify your results.

(5.0 Marks)

Answer 1