Question

In India electricity is supplied for domestic use at 220 V. It is supplied at 110 V in the USA. If the resistance of a 60W bulb for use in India is R, The resistance of a 60W bulb for use in the USA will be

• A. 2R
• B. $\frac{R}{4}$
• C. $\frac{R}{2}$
• D. R

Answer 1

Answer: (A)

2R

Answer 2

If the resistance of a 60W bulb for use in India is R, the resistance of a 60W bulb for use in the USA will be 2R.