Name: _______________________Block: _________ Date: ______________
IP614
V = IR, P = IV Practice
SHOW ALL WORK: Formulas used, numbers plugged in, final answers with
units.
1. What voltage (potential difference) can send 2.5 A of current through a
resistance of 10 Ω?
2. What voltage (potential difference) can send 6 A of current though a
resistance of 10Ω?
3. A 12 V battery sends 0.45 A though a resistor. What is the value of the
resistor?
4. A 120 V outlet sends 2.5 A through a resistor. What is the value of the
resistor?
5. A 1.5 volt battery is connected to a 50Ω resistor. How much current flows
through the resistor?
6. A 50 V potential difference (voltage) is applied across 75Ω of resistance.
What current passes through the resistor?
7. A 120 V potential difference sends a current of 0.5 A through a light bulb.
How much power is the bulb using?
8. A 120 V potential difference sends a current of 0.83 A though a light bulb.
What is the power rating of the bulb?
9. When a South American electric eel attacks prey, a 440 V potential difference
draws a current of 0.8 A. What is the electric resistance?
10. Calculate the resistance and the current of a 7.5 W night light bulb plugged
into a US household outlet (120 Volts).
11. Calculate the resistance and the current of a 1500 watt electric hair dryer
plugged into a US household outlet (120 Volts).
12. Determine the power of a saw that draws 12 amps of current when plugged
into a 120 Volts outlet.
13. In an experiment, the current is varied as it goes through a resistor in a circuit.
An ammeter measures the current going through the resistor and a voltmeter
measures the voltage across the resistor. The data is recorded and shown
below:
Circuit Data
Current (A)
Voltage (V)
0.20
1.2
0.40
2.4
0.80
4.8
1.20
7.2
1.60
9.6
2.80
16.8
a. Using the data in the table, make a graph of the voltage versus the current
in the circuit. Voltage should be on the y-axis. Make sure the graph has
clearly labeled axes and proper scale.
b. Find the slope of the graphed line. Show your calculations and included
units in your answer.
c. Explain what the slope represents.