Question 373: Current Electricity

Question

The length of a given cylindrical wire is increased by $$100\% $$. Due to the consequent decrease in diameter the change in the resistance of the wire will be

Accepted Answer

$${R_f} = {n^2}{R_1}$$
Here $$n=2$$ (length becomes twice)
$$	herefore$$ $${R_f} = 4{R_i}$$
New resistance $$=400$$ of $${R_i}$$
$$	herefore$$ Increase $$ = 300\% $$

Answer

$$200\% $$

Answer

$$100\% $$

Answer

$$50\% $$

Answer

$$300\% $$

Current Electricity

The length of a given cylindrical wire is increased by $100\% $. Due to the consequent decrease in diameter the change in the resistance of the wire will be

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