Magnetism and Electromagnetism
Strength of an electromagnet can be increased by

All of the listed here
Increasing the number of turns
Increasing the cross-sectional area
Increasing current supply

ANSWER DOWNLOAD EXAMIANS APP

Magnetism and Electromagnetism
In a simple magnetic field the strength of magnet flux

decreases continuously from initial value to final value
is constant and has same value in energy part of the magnetic field
first increases and then decreases till it becomes zero
increases continuously from initial value to final value

ANSWER DOWNLOAD EXAMIANS APP