2021 · Q21
Let an electric current of 1.5 A flow through an incandescent lamp in a circuit. What is the amount of charge that flows through it in 10 ms?
general-sciencephysics-light-electricity
- A0.015 C
- B0.15 C
- C1.5 C
- D15 C
Explanation
Electric charge is the product of current and time: Q = I x t. Here the current is 1.5 A and the time is 10 ms, which is 0.01 s. Multiplying gives 1.5 x 0.01 = 0.015 coulombs. The other options result from misplacing the decimal point in the millisecond-to-second conversion. Hence the charge that flows is 0.015 C.