Daily review: Ohm’s Law | Voltage Divider Rules Quiz
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10 Questions
Question 1 of 10
According to Ohm's Law, what is the relationship between current and resistance in a circuit with a constant voltage source?
Ohm's Law states I = V/R. Therefore, for a fixed V, current I is inversely proportional to resistance R.
Question 2 of 10
A 12V battery is connected to a 4-ohm resistor. What is the current flowing through the circuit?
Using I = V/R, I = 12V / 4? = 3A.
Question 3 of 10
In a series circuit consisting of two resistors, R1 = 2k? and R2 = 3k?, connected to a 10V source, what is the voltage across R2?
Using the voltage divider rule: V_R2 = V_total * [R2 / (R1 + R2)] = 10V * [3k / 5k] = 6V.
Question 4 of 10
Which of the following statements about the Voltage Divider Rule (VDR) is correct?
VDR is specifically used to find the voltage drop across individual resistors connected in series.
Question 5 of 10
If the resistance in a circuit is doubled while the voltage remains constant, what happens to the current?
Since I = V/R, if R is multiplied by 2, I is divided by 2.
Question 6 of 10
What is the power dissipated by a 10-ohm resistor with a current of 2A flowing through it?
Power P = I²R = (2A)² * 10? = 4 * 10 = 40W.
Question 7 of 10
In a voltage divider circuit, what happens to the output voltage as the load resistance decreases?
Loading effect: adding a lower resistance in parallel with the divider resistor reduces the total resistance and the output voltage.
Question 8 of 10
What is the equivalent resistance of a circuit where 10V produces 2mA of current?
R = V/I = 10V / 0.002A = 5000? = 5k?.
Question 9 of 10
Can the Voltage Divider Rule be applied if the resistors are not in series?
The voltage divider rule is derived strictly from series circuit properties where current is common.
Question 10 of 10
What is the voltage across an open circuit?
In an open circuit, resistance is infinite, so the full potential difference of the source appears across the open terminals.
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