The resistance of the voltmeter is R = 6.0 kOhm. What charge will pass through the voltmeter during t = 2.0 minutes if it shows a voltage of U = 90 V?
Initial data: R (value of the resistance of the voltmeter) = 6 kOhm; t (duration of the passage of the charge) = 2 min; U (voltage indicated by the voltmeter) = 90 V.
SI system: R = 6 kOhm = 6 * 10 ^ 3 Ohm; t = 2 min = 120 s.
1) Determine the current in the voltmeter: I = U / R = 90 / (6 * 10 ^ 3) = 0.015 A.
2) We calculate the value of the charge that passed through the voltmeter: q = I * t = 0.015 * 120 = 1.8 Cl.
Answer: In 2 minutes, a charge of 1.8 Cl can pass through the voltmeter.
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