Question

A wire of resistance R is cut into three equal parts and are bundled side by side.The resistance of bundle is?

Answer 1

Answer:

The resistance of the bundle = Rp = R/9

Explanation:

A wire of resistance 'r' is cut into 3 equal parts.

Therefore, 3 equal resistance new wires are formed

Imagine them as resistors ( each resistor has resistance r/3 because each resistor has 1/3 the total resistance before the wire was cut)

They are connected in parallel

Therefore, Use resistors in parallel formula

1/Rp = 1/R1 + 1/R2+ 1/R3

1/Rp =  3/r + 3/r + 3/r

1/Rp =     9/r

 Rp =  r/9

NOTE : KINDLY REFER TO THE IMAGE BELOW .