Name two factors on which the strength of magnetic field of an electromagnet depends.

How is an electromagnet made ? Name two factors on which the strength of the magnetic field of an electromagnet depends.

State two ways by which the strength of magnetic field of an electromagnet can be increased.

The electric and magnetic field of an electromagnetic wave is

Why can't two magnetic field lines cross each other? Draw the magnetic field lines (including field directions) of the magnetic field due to a long straight solenoid. What important property of this field is indicated by this field line pattern? Name any two factors on which the magnitude of the magnetic field due to this solenoid depends.

The strength of the earth's magnetic field is

Name two factors on which the self-inductance of an air-core coil depends.

Write two factors on which the rate of evaporation depends.

Name two factors on which the refractive index of a medium depends ? State how does it depend on the factors stated by you.

Name the factors on which the rotational kinetic energy depend.

Name two factors on which the magnitude of an induced e.m.f. in the secondary coil depends.