H2P-372
Describing alternating current
H2 Physics · JC 2 · Easy · Describing alternating current
A 50 Ω resistor is connected to an a.c. supply. The current varies with time as , where is in A and in s. Calculate the r.m.s. current in the resistor.
- 4.2 A
- 6.0 A
- 3.0 A
- 2.1 A
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