1. The principle formula for measuring resistance using the Volt-Ampere method is:
- A. $P = VI$
- B. $V = IR$
- C. $R = \frac{V}{I}$
- D. $I = \frac{V}{R}$
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Volt-Ampere Method - Quiz
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The principle formula for measuring resistance using the Volt-Ampere method is:
Volt-Ampere Method - Quiz - Quiz Questions
Check your mastery of the Volt-Ampere experiment principles, steps, and error handling through the following exercises.
2. Before closing the switch, the slider of the sliding rheostat should be adjusted to:
- A. Minimum resistance
- B. Maximum resistance
- C. Middle position
- D. Any position
3. In the experiment, if the voltmeter reading increases but the ammeter reading decreases, this is likely because:
- A. Resistor under test is open
- B. Resistor under test is shorted
- C. Voltmeter is connected across the sliding rheostat
- D. Power supply voltage is unstable
4. A student recorded three sets of data in the experiment, calculating resistance values of $10.2\Omega$, $9.8\Omega$, and $10.1\Omega$. The final measurement result for this resistor should be recorded as:
- A. $10.2\Omega$
- B. $10\Omega$
- C. $10.03\Omega$
- D. $10.0\Omega$
5. True or False: In the Volt-Ampere experiment, one of the main functions of the sliding rheostat is to change the voltage across the resistor under test by changing the resistance in the circuit.
- True
- False
6. In a Volt-Ampere experiment, a measurement yields $U = 2.4V$, $I = 240mA$. Find the resistance value of the resistor under test.
- A. $0.1\Omega$
- B. $1.0\Omega$
- C. $10\Omega$
- D. $100\Omega$
7. The Volt-Ampere experiment requires averaging multiple measurements mainly to reduce what type of error?
- A. Systematic error
- B. Random error
- C. Instrument error
- D. Theoretical error
8. In the Volt-Ampere circuit, the correct connection method for the ammeter and voltmeter is:
- A. Ammeter in parallel, voltmeter in series
- B. Ammeter in series, voltmeter in parallel
- C. Both in series
- D. Both in parallel
9. If both voltmeter and ammeter readings are smaller than expected during the experiment, the most likely cause is:
- A. Resistor under test is shorted
- B. Sliding rheostat resistance is too large
- C. Power supply voltage is insufficient or contact resistance is too large
- D. Ammeter range selection is too large
10. True or False: The Volt-Ampere method for measuring resistance only applies to constant linear resistors and not to resistors that vary with temperature (like filaments).
- True
- False