Strength of the electromagnet: The strength of the electromagnet can be increased:
State two ways by which the strength of an electromagnet can be increased.
What is an electromagnet ? Name two factors on which the strength of magnetic field of an electro-magnet depends and state how does it depend on the factors stated by you.
The electric field strength in an electro-magnetic wave is 104 V/m. Then the corresponding magnitude of magnetic field strength (in tesla) in the wave will be: