Sponsor Area
Electromagnetism
On reversing the direction of the current in a wire, the magnetic field produced by it gets .....
reversed
i) Name the high energetic invisible electromagnetic waves which help in the study of the structure of crystals.
ii) State an additional use of the waves mentioned in part (e) (i)?
i) X-rays.
ii) X-rays are used for detection of fracture in bones, teeth etc.
i) Why does a current carrying, freely suspended solenoid rest along a particular direction? [2]
ii) State the direction in which it rests.
i) Current carrying freely suspended solenoid behaves just like a bar magnet with fixed polarities (North and South) at its ends. Hence, it rest in North-South direction exactly in the same manner as a bar magnet does.
ii) North- South direction
Give two similarities between A.C. generator and a D.C. motor.
Similarities between A.C. and D.C. are as follows:
i) Both have a string horse shoe permanent magnet or an electromagnet.
ii) Both have an armature coil having soft iron core.
Sponsor Area
Mock Test Series
Mock Test Series