railway RRB Technician Grade 1 Mock Test 2024 Physics Electric Charges and Coulomb's Law Basic Properties of Electric Charge
The filament of an electric bulb draws a current of 0.05 A from a 200 V source. The power of the bulb and the number of electrons (charge = 1.6 x 10-19C) passing through a cross section of the filament in 5 minutes respectively are
1
10 W ; \(\backsimeq\) 9 × 1019
2
100 W ; \(\backsimeq\) 9 × 1019
3
10 W ; \(\backsimeq\) 9 × 1018
4
1 W ; \(\backsimeq\) 9 × 1018