1. According to Ohm's Law $I = V/R$, when resistance is constant, the relationship between current $I$ and voltage $V$ is:
- A. Directly proportional
- B. Inversely proportional
- C. Squared relationship
- D. No relationship
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Ohm's Law - Practice Quiz
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According to Ohm's Law I=V/R, when resistance is constant, the relationship between current I and voltage V is:
Ohm's Law - Practice Quiz - Quiz Questions
Test your understanding of the quantitative relationship between current, voltage, and resistance through these exercises.
2. When the voltage across a conductor is $6V$, the measured current is $1A$. If the voltage changes to $12V$, the resistance of the conductor is:
- A. 12Ω
- B. 6Ω
- C. 3Ω
- D. 2Ω
3. In the simulation, a warning appears when current exceeds $25mA$. If the resistance is set to $200\Omega$, at what voltage will the warning be triggered?
- A. 2V
- B. 4V
- C. 5V
- D. 6V
4. True or False: A larger current in a conductor indicates that the conductor's resistance is smaller.
- True
- False
5. Which of the following physical quantities does NOT change with variations in voltage and current?
- A. Voltage
- B. Current
- C. Resistance
- D. Electric Power
6. When the voltage across a bulb is $6V$, the current through it is $0.5A$. The resistance of the bulb is:
- A. 3Ω
- B. 6Ω
- C. 12Ω
- D. 1.2Ω
7. If we want to explore the 'Relationship between Current and Resistance', according to the control variable method, which physical quantity should be kept constant?
- A. Current
- B. Resistance
- C. Voltage
- D. Electric Power
8. Which of the following statements about Ohm's Law $I = V/R$ is correct?
- A. When the voltage across a conductor is zero, its resistance is also zero
- B. The larger the current in a conductor, the smaller its resistance
- C. From $R = V/I$ it can be seen that resistance is directly proportional to voltage
- D. Current in a conductor is directly proportional to voltage and inversely proportional to resistance
9. Regarding the 'Short Circuit' phenomenon in this experiment, which of the following descriptions is incorrect?
- A. Resistance in the circuit is extremely small during a short circuit
- B. Current instantly becomes very large during a short circuit
- C. Short circuit can burn out the power source or wires
- D. Ohm's Law is not followed during a short circuit
10. If the positions of the voltmeter and ammeter are swapped (voltmeter in series, ammeter in parallel) while measuring resistance using the Voltmeter-Ammeter Method as shown, what will happen after closing the switch?
- A. The ammeter will be burnt out
- B. The voltmeter will be burnt out
- C. Unable to read, but components usually won't be damaged
- D. The bulb will be burnt out