Which of the following are characteristics of electromotive force (emf)?

It is a special type of potential difference.

It is the potential difference of a source when no current is flowing.

It is the resistance to the flow of current within the source.

Which of the following statements are true about resistors in series?

The total resistance is the sum of individual resistances.

The current through each resistor is the same.

The total voltage is the sum of voltages across each resistor.

The voltage across each resistor is the same.

Select all statements that are true about Kirchhoff's Rules.

They can be used to analyze any circuit, simple or complex.

The first rule is called the junction rule.

The second rule is called the loop rule.

They only apply to series circuits.

Which of the following best describes Kirchhoff's First Rule?

The sum of all currents entering a junction equals the sum of all currents leaving the junction.

The algebraic sum of changes in potential around a closed circuit path must be zero.

The total resistance in a series circuit is the sum of all resistances.

The total capacitance in a parallel circuit is the sum of all capacitances.

Select all correct statements about the behavior of a capacitor in an RC circuit over time.

At t = 0, the capacitor behaves like a short circuit.

At t = infinity, the capacitor behaves like an open circuit.

The charge on the capacitor increases over time.

The voltage across the resistor increases over time.

Which of the following statements about an RC circuit is correct at t = 0?

The voltage across the capacitor is zero.

The current in the circuit is zero.

The charge on the capacitor is maximum.

The voltage across the resistor is zero.

Lesson 5-Direct Current Lesson

48 questions

Show all answers

1.

SLIDE QUESTION

30 sec • Ungraded

2.

SLIDE QUESTION

30 sec • Ungraded

3.

SLIDE QUESTION

30 sec • Ungraded

4.

SLIDE QUESTION

30 sec • Ungraded

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following statements best describes the difference between direct current (DC) and alternating current (AC)?

DC flows in one direction, while AC changes direction periodically.

DC and AC both flow in one direction only.

AC flows in one direction, while DC changes direction periodically.

DC and AC are both produced by batteries.

6.

SLIDE QUESTION

30 sec • Ungraded

7.

OPEN ENDED QUESTION

3 mins • 1 pt

Describe how a battery converts chemical energy to electrical energy and the significance of emf in this process.

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Lesson 5-Direct Current

48 questions

Which of the following statements best describes the difference between direct current (DC) and alternating current (AC)?

Describe how a battery converts chemical energy to electrical energy and the significance of emf in this process.

All voltage sources have a source of electrical energy with a characteristic ___ and an internal resistance r.

Which of the following are characteristics of electromotive force (emf)?

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