Download GP/IP - Uplift North Hills

Name_________________________________________ Date_________ House____________________ Class________
U5. L5. Simple Circuits GP/IP
SHOW ALL WORK USING GUESS. No GUESS, no credit. Box final answers and write them in a sentence.
Examples
1.
A 12 V battery causes a 3 amp current through a light bulb.
a. What is the resistance of the light bulb?
b.
How much power does it draw?
2.
A light bulb in a circuit with a 12 V battery uses 24 watts. What is the resistance of the light bulb?
3.
In a circuit, what happens to the current if the voltage is tripled and the resistance remains the same?
GUIDED PRACTICE
1.
A hair dryer draws 3.5 A of current when connected to an outlet with a potential difference of 120 V. What is the resistance
of the hair dryer? (Answer: The resistance of the hair dryer is 34.29 ohms.)
Created by M. Kelly
OBJECTS IN MOTION STAY IN MOTION!
2.
If your cell phone has a 3.7 V battery uses 17 watts while playing Clash of Clans. What is the resistance inside your phone?
(Answer: The resistance of the phone is 0.81 ohms.)
3.
In a circuit, what happen to the current if the resistance of the circuit is tripled?
(Answer: The new current is one third of the original current; 1/3 I)
4.
In a circuit, if the voltage is doubled and the resistance is quadrupled, what will happen to the current in the circuit?
(Answer: The new current is ½ of the original current; ½ I)
INDEPENDENT PRACTICE
1.
A light bulb with a resistance of 160  is plugged into a 120-V outlet. What is the current flowing through the bulb?
2.
An iPhone requires 1.5 A of current and has a power of 15 watts. What is the voltage of the rechargeable battery it uses?
3.
In a circuit, what happens to the power if the voltage is doubled and the resistance remains the same?
Created by M. Kelly
OBJECTS IN MOTION STAY IN MOTION!
4.
In a circuit, what happens to the power if the resistance is decreased by half and the voltage remains the same?
5.
A TV draws 3 amps of current and requires 100 W of power. What is the resistance of the TV?
6.
Can a 1.5V battery provide enough current to keep a phone with 0.3 ohms of resistance working if it needs at least 1 amp of
current to function?
7.
In a circuit, what happens to voltage if the current is triple and the resistance is doubled?
8.
In a circuit, what happens to voltage if the current is triple and the resistance is cut in half?
9.
In a circuit, what happens to current if the power is doubled and the voltage is cut in half?
10. A 140  is used and has a current of 1.3 A flowing through it. What power does it create?
Created by M. Kelly
OBJECTS IN MOTION STAY IN MOTION!