A electric heater consists of a straight nichrome wire of length

PHYSICS · Subjective · AP · Physics 2: Algebra-based · Magnetism and Electromagnetism · Magnetism and Electromagnetism

Problem

40\,\text{W}

electric heater consists of a straight nichrome wire of length

0.50\,\text{m}

. The heater is connected to a

20\,\text{V}

DC supply and is kept in a region having a uniform magnetic field. The wire makes an angle of

60^{\circ}

with the direction of the field. (i) Calculate the current flowing through the wire. (ii) If the magnetic force required on the wire is

0.30\,\text{N}

, determine the minimum magnetic field strength needed in the region.