Question

If you wanted to

reduce the resistance
in a circuit, what
should you do?
A. increase the length of the wire
B. replace a steel wire with a copper wire
C. replace a wide wire with a thin wire

Answer 1

Option C

Step-by-step explanation:

According to the formula

• 
  `\\ \boxed{\sf R=\rho(\ell)/(A)}`

So

If we use wide wire we increase the area of cross section so resistance decreases

Answer 2

Replace a steel wire with a copper wire. Option B is correct.

What is resistance ?

The amount of difficulty an electric current has passing through a substance is measured by its resistance.

When it comes to electrical resistance, copper is less than steel. Consequently, the total resistance in the circuit will be reduced when a copper wire is used in place of a steel wire.

Therefore, Replace a steel wire with a copper wire.

So, Option B is correct.