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WorksheetsICP Electricity and Circuits Exam
Total questions: 48
Worksheet time: 34mins
Find the resistance of a circuit that draws 0.06 amperes with 12 volts applied. Do not use a label.
(a)
A transformer is connected to 120 volts. Find the current if the resistance is 480-ohms? Do not use a label.
(a)
A load of 600-ohms is connected to a 24 V power supply. Find the current through the resistor. Do not use a label.
(a)
Would the bulb glow in the given circuit?
Yes
No
Which of the following could be used to complete a circuit?
Cloth
Cardboard
Rubber Band
Penny
What needs to be changed to make this circuit work?
Add an extra wire
Flip one of the batteries
Reconnect the wires to the lightbulb so that they are both touching the same connector
Why do electricians wear gloves made of rubber?
It is soft.
It is waterproof.
It is an insulator.
It is inexpensive.
If we touch a a live wire carrying current, we get a shock. This is because our body is a/an
conductor of electricity
insulator of electricity
source of electricity
None of these
Why is a switch used in a circuit?
To complete or break a circuit
To save energy
To prevent electric shocks
To make the bulb glow easily
What are the two places on the battery to which the wires can be attached called?
Switches
Filaments
Insulators
Terminals
A PATH along which electricity can flow is a ___________________?
light bulb
switch
insulator
circuit
When a circuit is closed, the load is _____________?
On
Off
When a circuit is open, the circuit is _________?
On
Off
What is a device that needs electricity to work?
switch
load
wire
electron
Which is NOT a good insulator?
silver
plastic
glass
rubber
this circuit is .....?
open
parallel
closed
adorable
Which object does NOT conduct electricity?
copper wire
iron nail
salt water
wood
Why must every electric circuit have a voltage source, such as a battery?
Without a voltage source, the resistance would be too high
Without a voltage source, the resistance would be too low
Without a voltage source, there would be no electrons in the circuit
Without a voltage source, there would be no source of current
The flow of electrons is also called..
Resistance
Voltage
Current
Magnetism
Allows electrons to flow easily from one place to another.
Resistor
Conductor
Insulator
Plastics
Which circuit below would be described as "closed"?
If you INCREASE VOLTAGE, what happens to CURRENT?
it increases
it decreases
it stays the same
A 3 volt battery is switch out and replaced with a 6 volt battery. What happens to the resulting current?
It halves
It doubles
It stays the same
It triples
If you INCREASE RESISTANCE, what happens to CURRENT?
It decreases
It increases
It stays the same
A 4 ohm resistor is replaced with a 2 ohm resistor. What happens to the current in the circuit?
It halves
It triples
It doubles
It quadruples
Which particle in an atom has negative charge?
proton
neutron
electron
nucleon
An electric current is a flow of (a) ?
What is the unit of current?
amps
volts
ohms
coulombs
What are the units of resistance?
amps
volts
ohms
coulombs
If two resistors of 10 ohms each are connected in series, what is the total resistance?
10 ohms
5 ohms
20 ohms
100 ohms
Which equation can be used to calculate the resistance R of a resistor?
V = I / R
I = V x R
R = V x I
V = I x R
A current of 2A flows through a resistor with a resistance of 10Ω. What is the potential difference across the resistor?
5V
5J
20V
20J
A resistor has a potential difference of 10V across it and a current of 2A flowing through it. What is the resistance of the resistor?
20Ω
5Ω
200Ω
0.2Ω
A light bulb has a resistance of 7Ω with a potential difference of 21V across it. What is the current flowing through the light bulb?
147 A
28 A
3A
30A
How many volts are in a circuit with a battery that has a resistance of 10 Ω and a current of 2 A?
0.5 V
5 V
20 V
How do you find total resistance in a series circuit?
Add the resistors together
Add the inverse of the resistors together
Multiply the resistors
Subtract the resistors from the current
Use the largest value as the main and total resistance
Tommy runs his juicer every morning. The juicer uses 90 W of power and the current supplied is 4.5 A. What is the resistance of the juicer?
4.4 Ω
405 Ω
20 Ω
.05 Ω
If a blender is plugged into a 110 V outlet that supplies 2.7 A of current, what amount of power is used by the blender?
297 W
297 Ohms
40.7 W
40.7 Ohms
Over 9000
Copper has a/an _____ resistance to electron flow than lead.
greater
lower
equal
400.3 W
