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

It is a special type of potential difference.

It is the potential difference when no current is flowing.

It is a force that pushes electrons.

When does the terminal voltage of a battery equal its emf?

When the internal resistance is infinite.

When the battery is disconnected from the circuit.

When the voltage output is maximum.

Which two characteristics do all voltage sources have according to the concept of electromotive force?

A source of electrical energy and an internal resistance

A source of electrical energy and a capacitor

An internal resistance and a diode

Which of the following are characteristics of resistors in series?

The total current is equal to each individual current; the total voltage is the sum of individual voltages; the total resistance is the sum of individual resistances

The total current is the sum of individual currents; the total voltage is the sum of individual voltages; the total resistance is the sum of individual resistances

The total current is equal to each individual current; the total voltage is equal to each individual voltage; the total resistance is the sum of individual resistances

The total current is the sum of individual currents; the total voltage is equal to each individual voltage; the total resistance is the sum of individual resistances

Which of the following is a characteristic of resistors connected in parallel?

The total current is the sum of the currents through each resistor

The total voltage across each resistor is different

The total resistance is the sum of the individual resistances

Each resistor is connected in series with the voltage source

According to Kirchhoff’s first rule, what must be true at any junction in an electrical circuit?

The sum of all currents entering a junction must equal the sum of all currents leaving the junction

The sum of voltages entering a junction must be zero

The sum of resistances at a junction must be equal

The sum of all currents entering a junction must be greater than the sum leaving

Given the circuit with a 24V battery, a 3Ω resistor in series, and 4Ω and 12Ω resistors in parallel, which of the following statements are correct about the voltage drop across the resistors?

The voltage drop across the 4Ω and 12Ω resistors is the same

The voltage drop across the 3Ω resistor is less than the battery voltage

The voltage drop across the 3Ω resistor is equal to the battery voltage

The voltage drop across the 4Ω resistor is greater than that across the 12Ω resistor

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

DC flows in one direction, AC changes direction periodically.

DC changes direction periodically, AC flows in one direction.

Both DC and AC flow in one direction.

Both DC and AC change direction periodically.

Colloquium - Direct Current Lesson

48 questions

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1.

SLIDE QUESTION

30 sec • Ungraded

2.

SLIDE QUESTION

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3.

SLIDE QUESTION

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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) as shown in the diagrams?

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

DC and AC both flow in one direction.

AC is used only in batteries, while DC is used in household outlets.

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

6.

SLIDE QUESTION

30 sec • Ungraded

7.

SLIDE QUESTION

30 sec • Ungraded

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