Question

In a current carrying conductor, what happens to the magnetic field produced if the supplied voltage is increased and current is maintained constant?

(a) Field strength increases

(b) Field radius increases

(c) Filed strength decreases

(d) Does not change

The question was posed to me in an international level competition.

My question comes from Antenna Fundamentals topic in division Antennas and Wave Propagation of Avionics

Answer 1

Right choice is (d) Does not change

The explanation: The magnetic field produced by a current carrying conductor is only influenced by the current and not the voltage. Since the current is maintained constant, there is no change in the magnetic field strength or radius.