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Worksheets10.3 Resistance, Ohm's Law, and the Power Law
Total questions: 20
Worksheet time: 10mins
What is the unit of resistance?
Watt
Ohm
Ampere
Volt
Ohm's Law is mathematically represented as:
R = V / I
P = I × V
V = I × R
I = V / R
In the water analogy, what is equivalent to voltage?
Flow rate
Pressure
Hydraulic resistance
Power
What is the formula for electric power according to the Power Law?
P = I / V
P = V / I
P = I × V
P = V × R
What happens to a resistor when enough charge is forced through it at high voltage?
It glows
It becomes superconductive
It cools down
It breaks
What is the analogy for electrical resistance in the water flow model?
Pressure
Power
Flow rate
Hydraulic resistance
What is the unit of electric power?
Ohm
Volt
Watt
Ampere
If a 2.00-ohm resistor has a voltage drop of 1.000V, what is the current?
2.000A
1.000A
0.250A
0.500A
What is the relationship between voltage, current, and resistance in Ohm's Law?
Voltage is the sum of current and resistance
Voltage is the product of current and resistance
Current is the product of voltage and resistance
Resistance is the product of voltage and current
What is the equivalent of electric current in the water flow analogy?
Power
Hydraulic resistance
Flow rate
Pressure
What is the resistance if a voltage of 12V is applied and the current is 1.2A?
10 ohms
12 ohms
1 ohm
0.1 ohms
What is the effect of opening a water valve from one quarter to one half in the analogy?
Decreases hydraulic resistance
Increases hydraulic resistance
Increases pressure
Decreases flow rate
What is the analogy for electric power in the water flow model?
Flow rate × hydraulic resistance
Pressure drop × flow rate
Pressure × hydraulic resistance
Flow rate / pressure
What is the current if a 10-ohm resistor has a voltage drop of 12V?
10A
0.12A
1.2A
12A
What is the power if the current is 2A and the voltage is 5V?
7W
10W
2W
5W
What is the analogy for voltage in the water flow model?
Power
Hydraulic resistance
Pressure
Flow rate
What is the resistance if a voltage of 1000V is applied and the current is 500A?
0.5 ohms
5 ohms
2 ohms
10 ohms
What is the unit of current?
Volt
Ampere
Ohm
Watt
What is the effect of increasing the voltage across a resistor?
Increases current
Increases resistance
Decreases resistance
Decreases current
What is the power if the voltage is 10V and the current is 3A?
30W
13W
3W
10W
