a cool easy problem
Electricity and Magnetism
Level
1
Resistance of a conductor of length 75 cm is 3.25 ohm.
What will be the length of a similar conductor whose resistance is 13.25 ohm ?
305.76
310.76
320.76
503.76
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1 solution
by unitary method...
3.25ohm--------->75cm
1ohm------------>75/3.25
13.25ohm------->75 ×13.25/3.25 = 305.76 cm