If the Voltage stays the same and Resistance is increased, Current will
Increase
Decrease
Stay the same
X
Q.2.
Current times Resistance equals (I X R)
Power
Voltage
Amperage
Ohm
Q.3.
What unit is used to measure the voltage?
Ohms
Omega
Volts
Amps
Q.4.
What is the formula for ohms law?
1+2=3
R X E = I
V =I x R
E= MC squared
Q.5.
What is the Voltage of a circuit that has a resistance of 5 Ω and a current of 2 A?
25 V
10 V
2.5 V
0.4 V
Q.6.
What is the voltage of a circuit with 4 ohms of resistance and 3 amps of current?
12 V
21 V
4/3 V
3/4 V
Q.7.
What unit is used to measure resistance?
Ohms
Omega
Volts
Amps
Q.8.
What unit is used to measure current?
Ohms
Omega
Volts
Amps
Q.9.
Static electricity is an electric charge caused by friction that can build up on a material or surface. One example of static electricity is:
solar power
magnetism
lightning
Q.10.
What happens if you line the magnets up so that two of the same poles face each other? (ex. North Pole & North Pole)
They will attract
They will repel
Q.11.
How many Volts would we need to produce a current flow of 8 Amps through a 6 Ohm resistor
12 volts
24 volts
1.3333
48 volts
Q.12.
What voltage is needed to cause acurrent flow through aresistor?
10V
2.5V
7V
0.4V
Q.13.
In a closed circuit containing one resistor and a battery, if the voltage in the battery increases, the current going through the resistor increases. Why does this occur?
As the electrons are sped up, they bunch closer together.
As the electrons have more energy, they vibrate more rapidly.
As the electrons are pushed more by the battery, they move faster through the circuit.
As the distance around the circuit increases, the electrons take longer to travel around.
Q.14.
Laser printers work with the use of heat and positive and negative charges. The laser etches a negative charge on spots of the printer drum in the form of text or images. The plastic ink dust is attracted to the places on the drum with this negative charge. What is the charge of the plastic ink dots themselves?
electron
negative
neutral
positive
Q.15.
Magnets have a north and a south ___________
shape
color
pole
region
Q.16.
What resistance is needed to cause acurrent flow because of abattery?
10Ώ
5Ώ
2500Ώ
550Ώ
Q.17.
What is voltage measured in?
Ω (Ohms)
V (Volts)
A (Amps)
W (Watts)
Q.18.
Alexandra was preparing to go on a hike in the woods. She gathered the equipment she would need and placed it on the kitchen counter. By chance, she placed her compass near an electrical outlet. Although the compass was not moving, the compass needle turned because ______.
the electric current in the outlet produced a magnetic field
the compass could only be used outdoors
the kitchen counter was made of a magnetic substance
the kitchen had a microwave oven
Q.19.
Which of the following objects would NOT be a good insulator of electric charge?
skin
wood
plastic
rubber
Q.20.
What process is the method by which a neutral object obtains an electrical charge from a distance?
convection
conduction
radiation
induction
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