P.3.5.1.6 Electromotive force; internal resistance 11th - 12th Grade Quiz

P.3.5.1.6 Electromotive force; internal resistance

Assessment

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Stanton Wertjes

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Physics

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11th - 12th Grade

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38 plays

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Hard

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8 questions

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Multiple Choice

30 sec

1 pt

The reading on the voltmeter halves when switch S is closed.

What is the internal resistance of the cell?

0.50 Ω

1.0 Ω

2.0 Ω

4.0 Ω

Multiple Choice

30 sec

1 pt

Three cells each have an emf ε = 1.5 V and an internal resistance r = 0.6 Ω.

Which combination of these cells will deliver a total emf of 1.5 V and a maximum current of 7.5 A?

Multiple Choice

30 sec

1 pt

The cell in the following circuit has an emf (electromotive force) of 6.0 V and an internal resistance of 3.0 Ω. The resistance of the variable resistor is set to 12 Ω.

How much electrical energy is converted into thermal energy within the cell in 1 minute?

0.48 J

29 J

45 J

144 J

Multiple Choice

30 sec

1 pt

The cell in the circuit has an emf of 2.0 V. When the variable resistor has a resistance of 4.0 Ω, the potential difference (pd) across the terminals of the cell is 1.0 V.

What is the pd across the terminals of the cell when the resistance of the variable resistor is 12 Ω?

0.25 V

0.75 V

1.33 V

1.50 V

Multiple Choice

30 sec

1 pt

In the circuit shown, V is a voltmeter with a very high resistance. The internal resistance of the cell, r, is equal to the external resistance in the circuit.

Which of the following is not equal to the emf of the cell?

the reading of the voltmeter when the Switch S is open

the chemical energy changed to electrical energy when unit charge passes through the cell

twice the reading of the voltmeter when the switch S is closed

the electrical energy produced when unit current passes through the cell