Physics-
General
Easy
Question
A current flows through a rectangular conductor in the presence of uniform magnetic field B pointing out of the page as shown. Then the potential difference VP – VQ is equal to. (assume charge carriers in the conductor to be positively charged moving with a drift velocity of v)
- Bvb
- –Bvb
- Bvc
- –Bvc
The correct answer is: Bvc
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The plane of a square loop of wire with edge length a = 0.2 m is perpendicular to the earth's magnetic field BE at a point where BE = 15 
T. The total resistance of the loop and the wires connecting it to the galvanometer is 0.5 
. If the loop is suddenly collapsed (such that area of the loop becomes zero) by horizontal forces as shown, the total charge passing through the galvanometer is :
The plane of a square loop of wire with edge length a = 0.2 m is perpendicular to the earth's magnetic field BE at a point where BE = 15 T. The total resistance of the loop and the wires connecting it to the galvanometer is 0.5 . If the loop is suddenly collapsed (such that area of the loop becomes zero) by horizontal forces as shown, the total charge passing through the galvanometer is :
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