Question

A heating coil consumes 500 W at 2.5 A. What is the resistance of the coil? If the resistivity of the
material of the coil is 1.5 μΩ m and its diameter is 0.4 mm, calculate the length of the wire in the
coil.

Answer 1

Answer:

resistance=80 ohms

Don't know the answer for the second one.

Explanation:

first V=W÷I

So,V=500÷2.5=200 V

then,R=V÷I

R=200÷2.5=80 ohms