Answer:
option (a)
Explanation:
The magnetic field is produced by the electric current, and the direction of magnetic field is given by the Maxwells' right hand rule.
The magnetic field is also be produced by the time varying magnetic fields.
What a great photo ! The answer is 'diffraction'.
Answer:
You should try your best to answer the question.
The law of conservation of energy implies that energy can neither be created nor destroyed, but can be changed from one form to another.
Petroleum is a mixture of various components such as petrol,diesel, lubricating oil,paraffin wax, etc