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will the volts in a battery be the same as the voltmeter?
Im really good at science but this is just getting my brain all confused. Okay so here is the question: A parallel circuit has four resistors of 5ohms, 25 ohms, 45 ohms and 55 ohms, and a ammeter with 2.5 amps of current and a voltmeter and a battery. What will be the reading of the voltmeter and how many volts does the battery have.
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1 Answer
- Anonymous1 decade agoFavorite Answer
equivalent R = 1/(1/5 + 1/25 + 1/45 + 1/55) = 2,475/694 = 3.57 ohms
voltage = IR = 2.5*3.57 = 8.92 volts
This is the reading on the voltmeter. The battery has a voltage that is very slightly higher; there is a voltage drop across its internal resistance which is not measured by the voltmeter.