1. OBJECTIVE QUESTIONS

Potential difference, 3V =VV BA-=128 118- = 10V Work done, W =3Vq# =10 2# = 20J 13. If a wire of resistance R is melted and recast to half of its length, the new resistance of the wire will be (a) R 4 (b) R 2 (c) R (d) 2R Ans : (a) R 4 Volume of the wire does not change when the wire si melted and recast. If l and A are the original length ................
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