Electrical (A6)Câu 63 / 120
Using Ohm's law, a 12-volt circuit with 4 ohms of resistance will carry a current of:
a.48 amps
b.0.33 amps
c.3 amps
d.16 amps
Giải thích
Ohm's law states current equals voltage divided by resistance, so 12 volts divided by 4 ohms equals 3 amps. Understanding this relationship is essential for diagnosing circuit faults. Higher resistance in a circuit reduces current flow for a given voltage.
Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
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