Question

An electric heater draws 3.5 a from a 110 v source .the resistance of the heating element is approximately

Answer 1

given,
current I =3.5 ampere
potential different V =110v
let the resistance =R
using ohm's law,
V=IR
or,R=V/I
R=110/3.5
R=31.42 ohm.
hence the resistance is approximately 31.42ohm.

Answer 2

Given :

Current (I) = 3.5 A

Potential Difference (V) = 110 V

To Find :

Resistance of the heating element

Solution :

According to Ohm's Law, at constant temperature and other physical conditions, the current flowing through the conductor is directly proportional to the potential difference across the ends of the conductor. So,

Potential Difference (V) = Current (I) × Resistance (R)

So,

Resistance (R) = $\frac{V}{I}$

                        = $\frac{110}{3.5}$

                        = 31.43 ohm

Therefore, the resistance of the heating element is found to be 31.43 ohm