Moving Charges ...

Assertion If an electron is not deflected while passing through a certain region of space, then only possibility is that there is no magnetic region.
Reason Force is directly proportional to the magnetic field applied.

Assertion Free electrons always keep on moving in a conductor, even then no magnetic force acts on them in magnetic field unless a current is passed through it.
Reason The average velocity of free electrons is zero.

Assertion The ion cannot move with a speed beyond a certain limit in a cyclotron.
Reason As velocity increases time taken by ion increases.

Assertion The coil is bound over the metallic frame in moving coil galvanometer.
Reason The metallic frame helps in making steady deflection without any oscillation.

Assertion A circular loop carrying current lies in XY plane with its center at origin having a magnetic flux in negative Z-axis.
Reason Magnetic flux direction is independent of the direction of current in the conductor.

Assertion The magnetic field produced by a current carrying solenoid is independent of its length and cross-sectional area.
Reason The magnetic field inside the solenoid is uniform.

Assertion If an electron, while coming vertically from outerspace, enter the earth\'s magnetic field, it is deflected towards west.
Reason Electron has negative charge.

Assertion A direct current flowing through a metallic rod produces magnetic field only outside the rod.
Reason There is no flow of charge carriers inside the rod.

Assertion An electron and a proton enters a magnetic field with equal velocities, then, the force experienced by the proton will be more than electron.
Reason The mass of proton is 1837 times more than electron.

Assertion Torque on the coil is the maximum, when coil is suspended in a radial magnetic field.
Reason The torque tends to rotate the coil on its own axis.