alleryThe RIGHT-HAND THUMB RULE is used to find:
AThe angle of refraction when light enters glass
BThe voltage needed to drive a current in a wire
CThe direction of magnetic field around a current-carrying wire
DThe force experienced by a charged particle in a field
Answer & Solution
Correct answer: C. The direction of magnetic field around a current-carrying wire
The Right-Hand Thumb Rule: hold the conductor in your right hand with thumb pointing in current direction
your curling fingers give the direction of magnetic field lines around the wire.
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