A complete series circuit consists of a 12.0 V battery, a 4.70 O resistor, and a switch. The internal resistance of the battery is 0.30 O. The switch is open. What does an ideal voltmeter read when placed across the terminals of the switch?

12.0 V

9.40 V

2.40 V

zero

Question

Physics

Timothy Mcneil

13 September, 14:47

A complete series circuit consists of a 12.0 V battery, a 4.70 O resistor, and a switch. The internal resistance of the battery is 0.30 O. The switch is open. What does an ideal voltmeter read when placed across the terminals of the switch?

12.0 V

9.40 V

2.40 V

zero

+1

Answers (1)

Know the Answer?

Denisse Pineda · Answer 1

With the switch open, there's no current in the circuit, and therefore

no voltage drop across any of the dissipative elements (the resistor

or the battery's internal impedance). So the entire battery voltage

appears across the switch, and the voltmeter reads 12.0V.

A complete series circuit consists of a 12.0 V battery, a 4.70 O resistor, and a switch. The internal resistance of the battery is 0.30 O. The switch is open. What does an ideal voltmeter read when placed across the terminals of the switch?12.0 V9.40 V2.40 Vzero

A complete series circuit consists of a 12.0 V battery, a 4.70 O resistor, and a switch. The internal resistance of the battery is 0.30 O. The switch is open. What does an ideal voltmeter read when placed across the terminals of the switch?

12.0 V

9.40 V

2.40 V

zero