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Consider two rings of copper wire. One r...

Consider two rings of copper wire. One ring is scaled up version of the other, twice large in all regards (radius, cross sectional radius). If current around the rings are driven by equal voltage source then choose the CORRECT alternative(s). Assume that cross-sectional radius is very small as compared to radius of rings :

A

Resistance of larger ring is half of the smaller ring

B

Current in the larger ring is two times that in the smaller ring

C

Magnetic field at their centres are same

D

Magnetic field at centre oflarger ring is twice as that at the centre of smaller ring

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PHYSICS GALAXY - ASHISH ARORA-MAGNETIC EFFECTS OF CURRENT AND MAGNETISM-Advance MCQ
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