A complete series circuit consists of a 12.0 V battery, a 4.74 resistor, and a s

Question

A complete series circuit consists of a 12.0 V battery, a 4.74 resistor, and a switch. The internal resistance of the battery is 0.360 .

Part A: What does an ideal voltmeter read when placed across the terminals of the battery? The switch is open.

Part B: What does an ideal voltmeter read when placed across the resistor? The switch is open.

Part C: What does an ideal voltmeter read when placed across the switch? The switch is open.

Part D: What does an ideal voltmeter read when placed across the terminals of the battery? The switch is closed.

Part E: What does an ideal voltmeter read when placed across the resistor? The switch is closed.

Part F: What does an ideal voltmeter read when placed across the switch? The switch is closed.

Explanation / Answer

The switch is opened. ( zero current)

A. across the terminals of the battery it will read 12 V
B across the resistors zero.
C across the switch 12 V
============================
D switch is closed. ( current flows)

12•4.74/(4.74+0.360) = 11.15 V

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