Question

The potential difference between the terminals of electric heater is 60V, when it draws a current of 4A from the source. The resistance of electric heater coil is A. 15Ω B. 240Ω C. 24Ω D. 64Ω​

Answer 1

• V = 60V I = 4A R = VI = 604 = 15Ω When potential difference is increased to 120V I = VR = 12015 = 8A The current through the heater becomes 8A