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Series and Parallel Voltage Laws - Quiz

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Two resistors $R_1=5\Omega$ and $R_2=10\Omega$ are connected in series in a circuit with a $6V$ power supply. Which statement is correct?

Series and Parallel Voltage Laws - Quiz - Quiz Questions

Consolidate your understanding of series voltage division and parallel equal voltage laws with these questions.

1. Two resistors $R_1=5\Omega$ and $R_2=10\Omega$ are connected in series in a circuit with a $6V$ power supply. Which statement is correct?

A. The voltage across $R_1$ and $R_2$ is equal
B. The voltage across $R_1$ is greater than $R_2$
C. The voltage across $R_2$ is greater than $R_1$
D. The total voltage equals the difference of the resistor voltages

2. A parallel circuit has two branches. If the voltage across branch 1 is $3V$, what are the voltage across branch 2 and the power supply voltage respectively?

A. $1.5V$, $3V$
B. $3V$, $3V$
C. $3V$, $6V$
D. $6V$, $6V$

3. A $100\Omega$ resistor is connected in parallel with a $1\Omega$ resistor. Which description of the voltage relationship across them is correct?

A. Voltage across $100\Omega$ is 100 times that of $1\Omega$
B. Voltage across $1\Omega$ is 100 times that of $100\Omega$
C. The voltage across both is exactly equal
D. Cannot compare

4. True or False: In a series circuit, the sum of voltages across parts equals the total voltage, which is actually a manifestation of the Law of Conservation of Energy.

True
False

5. If three identical light bulbs are connected in series to a $12V$ regulated power supply, what is the voltage across each bulb?

A. $12V$
B. $6V$
C. $4V$
D. $3V$

6. In a series circuit, $R_1 = 20\Omega$, $R_2 = 30\Omega$, and the power supply voltage is $10V$. Find the voltage across $R_1$.

A. $2V$
B. $4V$
C. $5V$
D. $6V$

7. To investigate the 'relationship of branch voltages in parallel circuits', which of the following is the variable that needs to be controlled (kept constant)?

A. Resistance of each branch
B. Power supply voltage
C. Current in each branch
D. Material of wires

8. True or False: In a parallel circuit, increasing the resistance of a branch will increase the voltage across that branch.

True
False

9. What connection method is used for multiple appliances (e.g., lights, TV, AC) in a home circuit? What is the main reason?

A. Series, because it saves wire
B. Parallel, because each appliance receives the same rated voltage
C. Series, because it controls total power
D. Parallel, because current can add up

10. A student measured $U = 6V$, $U_1 = 2.5V$, $U_2 = 3.8V$ in a series circuit experiment and found $U_1 + U_2 \neq U$. What is the most reasonable explanation?

A. The voltmeter is broken
B. Existence of measurement error and reading error
C. Series voltage formula does not apply to this circuit
D. Resistor heating caused voltage loss