# V = IR, P = IV Practice ```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