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WorksheetsCURRENT ELECTRICITY
Total questions: 24
Worksheet time: 2hrs 55mins
An electrical junction has three wires A, B and C connected to it. Wire A carries 4.2 A going in, wire B carries 2.6 A going out. What does wire C carry?
1.6 A going in
1.6 A going out
6.8 A going in
6.8 A going out
Current is shared between two resistors of 3 Ω and 6 Ω, if the current in the 6 Ω is 12 A what is the total incoming current?
24 A
36 A
18 A
72 A
A potential divider contains three resistors of 4 Ω, 7 Ω and
9 Ω. If the voltage across the 7 Ω is 21 V, what is the supply voltage?
21 V
63 V
33 V
60 V
Analysis of a circuit produces two loop equations:
10x + 30y = 7 and 40x - 20y = 0
What are the currents x and y?
x = 50 and y = 10
x = 0.2 and y = 0.1
x = 0.01 and y = 0.02
y = 0.2 and x = 0.1
Select the correct statement:
The current in parallel resistors is always equal.
The sum of the sources of EMF and volt-drops in a closed loop is zero.
The sum of the currents in a closed loop is zero.
The sum of the voltages at a node is zero.
An electrical junction has four wires A, B, C and D connected to it. Wire A carries 7A going in, wire B carries 5 A going out and wire C carries 2 A going in. What does wire D carry?
10 A going out
5 A going out
4 A going in
4 A going out
Which statement is correct?
The current in parallel resistors is always equal.
The sum of the electric potential differences (or voltages) around a loop add to zero.
The sum of the currents in a closed loop is zero.
The sum of the voltages at a node is zero.
For the circuit shown, the resistances are R1 > R2 > R3. What is true about the current through each resistor?
I1 = I2 = I3
I1 > I2 > I3
I1 > I3 > I2
I1 < I3 < I2
Voltage is measured in what?
Ohms
Amperes
Volts
Watts
Current is measured in what units?
Volts
Ohms
Amperes
Watts
Resistance is measured in what units?
Volts
Amperes
Ohms
Kapernicks
How do you measure voltage, current, and resistance in a physical circuit?
Multimeter
Voltmeter
Ohmeter
Odometer
"The sum of all voltage drops in a series circuit equals the total applied voltage." This is know as what?
Ohm's Law
Kirchhoff's Voltage Law
Kirchhoff's Current Law
Bolen's Law
"The total current in a parallel circuit equals the sum of the individual branch currents."
Ohm's Law
Kirchhoff's Voltage Law
Kirchhoff's Current Law
Bolen's Law
"The sum of all voltage drops in a series circuit equals the total applied voltage." This is know as what?
Ohm's Law
Kirchhoff's Voltage Law
Kirchhoff's Current Law
Bolen's Law
Power is measured in what units?
Ohms
Volts
Amperes
Watts
What does Kirchhoff's second law show?
conservation of charge
conservation of energy
In any closed loop, the sum of the e.m.f. is equal to the sum of the products of the current and the resistance (potential difference).
The sum of the current entering a junction is the sum of the current leaving the junction.
Given the direction of the current shown. Which side of the resistor has the high electric potential energy?
left side is higher
right side is higher
Which side of the battery has the higher electric potential energy?
right side is higher
left side is higher
Which direction is the current traveling through this resistor?
Can't tell the direction of the current from from the given information.
The nano-sized tractor moves a charge across the resistor with the shown current. Will the charge gain or lose energy?
+ ΔV
- ΔV
varying potential difference
Can't tell from the given information.
What is the potential difference of location "B" in the circuit compared to location "A".? (for 3 points)
ΔVAB=-16V
ΔVAB = +16V
ΔVAB = -2V
ΔVAB = -22V
Is the potential at "B" higher or lower than "A's" potential? (for 3 points)
"B" is higher than "A"
"B" is lower than "A"
Can't tell from the given information.
What is the magnitude of the current, I, traveling down through the center wire? ( for 3 points)
1/6
1/3
3/6
6/3
