Skip to Content
10 questions
Show Answers
See Preview
- 1. Multiple-choice10 seconds1 pt
The statement which correctly represents Ohmโs law:
V = IR
V = R/I
R = VI
I = R/V
- 2. Multiple-choice30 seconds1 pt
A 10 ohms resistor is powered by a 5-V battery. The current flowing through the source is:
10 A
50 A
2 A
0.5 A
- 3. Multiple-choice30 seconds1 pt
An electric kettle with 50-ฮฉ heat element is powered by a 230-V wall outlet. The current flowing through kettle is
0.217 A
4.6 A
10.86 A
11500 A
- 4. Multiple-choice30 seconds1 pt
If doubling the voltage across a resistor doubles the current through the resistor, then
The resistor value decreased
The resistor value did not change
The resistor value increased
It is impossible to determine the change in the resistor value
- 5. Multiple-choice30 seconds1 pt
If the voltage across a fixed value of resistance is increased five times, what does the current do?
It increases by a factor of five.
It decreases by a factor of five.
It stays the same.
Not enough information
- 6. Multiple-choice30 seconds1 pt
If the resistance in a circuit with constant voltage increases, the current will
Increase
Decrease
Its stays the same
Not eneough information
- 7. Multiple-choice30 seconds1 pt
In a circuit, the total resistance is greater than the largest resistance in the circuit.
Series
Parallel
Either series or parallel
A. Neither series nor parallel
- 8. Multiple-choice30 seconds1 pt
Are the resistors shown connected in parallel or in series?
The resistors are connected in parallel because the same current flows through all three resistors.
The resistors are connected in parallel because different current flows through all three resistors.
The resistors are connected in series because the same current flows through all three resistors.
The resistors are connected in series because different current flows through all three resistors.
- 9. Multiple-choice30 seconds1 pt
Which of the following is a correct verbal expression for Ohmโs law
Ohmโs law says that the current through a resistor equals the voltage across the resistor multiplied by the resistance of the resistor.
Ohmโs law says that the voltage across a resistor equals the current through the resistor multiplied by the resistance of the resistor.
Ohmโs law says that the resistance of the resistor equals the current through the resistor multiplied by the voltage across a resistor.
Ohmโs law says that the voltage across a resistor equals the square of the current through the resistor multiplied by the resistance of the resistor.
- 10. Multiple-choice30 seconds1 pt
Two identical resistors are connected in parallel across the terminals of a battery. If you increase the resistance of one of the resistors, what happens to the current through and the voltage across the other resistor?
The current and the voltage remain the same.
The current decreases and the voltage remains the same.
The current and the voltage increases.
The current increases and the voltage remains the same.
