Electric Circuits
How does increasing the distance between capacitor plates affect capacitance?
Increases the capacitance.
Decreases the capacitance.
Does not affect the capacitance.
The effect depends on the voltage.
A capacitor with capacitance and voltage stores what amount of energy?
A multi-loop circuit requires setting up and solving simultaneous equations using KVL. Which of the following is a true statement about applying KVL?
KVL can only be applied to circuits with one loop.
KVL is based on the conservation of charge.
The direction of the loop does not affect the equations.
The number of independent KVL equations must equal the number of loops.
What does KCL state about the current entering and leaving a junction?
The current entering is greater than the current leaving.
The current entering is less than the current leaving.
The current entering equals the current leaving.
Current is zero at a junction.
A copper wire has a resistivity of 1.72 \times 10^{-8} \Omega \cdot m
, a length of 2 m, and a cross-sectional area of 3.44 \times 10^{-6} m^2
. What is its resistance?
Two objects are rubbed together. If one gains a negative charge, what happens to the other?
It gains a negative charge.
It remains neutral.
It gains a positive charge.
Charge is destroyed.
If the length of a wire is doubled and its radius is halved, how does the resistance change?
The resistance is halved.
The resistance remains the same.
The resistance is doubled.
The resistance increases by a factor of 8.

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What does a capacitor do in a DC circuit?
Allows current to flow continuously.
Blocks current flow after initially charging.
Acts as a resistor.
Generates current.
In a closed circuit loop, what is the sum of the voltage drops and rises?
Equal to the source voltage.
Always positive.
Always negative.
Zero.
Given a circuit loop with a 12V battery and two resistors, one with a 4 resistance. If the voltage drop across the 4 resistor is 4V, what is the voltage drop across the other resistor?
4V
6V
8V
12V