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A rectangular wire loop is connected across a power supply with an emf of 16 V. The wire loop is then used in an experiment to measure the strength of the magnetic field between the poles of a magnet. The magnet is placed on a digital balance, and the wire loop is held fixed between the poles of the magnet, as shown. The 0.020 m long horizontal segment of the loop is midway between the poles and perpendicular to the direction of the magnetic field. The balance was adjusted to ZERO before turning ON the power supply. When the power supply in the loop is turned on, a 4.0 A current flows in the direction shown


1. The resistance of the wire according to Ohm's Law is: _______W
2. The direction of the magnetic force on the wire segment in the magnetic field is Upwards/ Downwards (use Right Hand Rule)
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Added Mon, 27 Jul '15
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a)

according to ohms law

Voltage(V)=Current(I)*Resistance($)R

R=V/I=16/4

R=4 ohms

b)

According to right hand rule, direction is downwards
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Added Mon, 27 Jul '15
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