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WorksheetsFrey Science More Electricity
Total questions: 36
Worksheet time: 18mins
Name
Class
Date
1.
Electric charges that are ______________ attract each other.
a)
the same
b)
negative
c)
positive
d)
different
2.
__________________ is the transfer of electrons from a charged object to another object by direct contact.
a)
Convection
b)
Radiation
c)
Friction
d)
Conduction
3.
The unit of measure of voltage is the __________
a)
Ohm
b)
Watt
c)
Watt-Hour
d)
Volt
4.
The unit of measure for current is _______________.
a)
Ohm
b)
Watt
c)
Volt
d)
Amp
5.
Energy can be calculated by
a)
dividing power by time
b)
multiplying power by time
c)
dividing voltage by current
d)
multiplying current by resistance
6.
As the temperature of most conductors increases, the resistance ______________________.
a)
decreases
b)
increases
c)
doubles
d)
stays the same
7.
In a ____________________ there is only one path for current to take.
a)
series circuit
b)
parallel circuit
c)
compound circuit
d)
short circuit
8.
If one light bulb is removed from a parallel circuit with three bulbs, then the other bulbs _____________ .
a)
brightness will decrease
b)
brightness will increase
c)
brightness remain the same
d)
brightness will double since there are now only two bulbs
9.
The electrons in an insulator are _________________________ to their atoms.
a)
unrelated
b)
loosely bound
c)
unbound
d)
thightly bound
10.
In a circuit diagram, a zigzag line drawn inside of a circle represents a type of _______________.
a)
switch
b)
motor
c)
voltmeter
d)
resistor or light bulb
11.
Like electric charges ___________ each other
a)
attract
b)
repel
c)
change
d)
convert
12.
The strength of the electric field of a charged particle becomes greater as the distance from the particle _______________.
a)
decreases
b)
increases
13.
Chemical reactions occur between the _________________ and the electrodes in a electrochemical cell.
a)
zinc oxide
b)
voltage source
c)
carbon rod
d)
electrolyte
14.
Batteries and generators are example of __________________ which create a potential difference in a circuit.
a)
resistors
b)
insulators
c)
voltage source
d)
loads
15.
The greater the ________________, the less current there is for a given voltage (so the light would get dimmer).
a)
ampere
b)
voltage
c)
resistance
d)
time
16.
If two wires of the same material have the same thickness but different lengths, the ________________ wire will have a greater resistance.
a)
longer
b)
shorter
17.
For a current of 3 amps and a voltage of 9 volts the resistance________________.
a)
3 watts
b)
3 ohms
c)
27 watts
d)
27 ohms
18.
To measure the current through a device in an electric circuit, a(n) ________________ should be connected in series with the device.
a)
voltmeter
b)
psychrometer
c)
odometer
d)
ammeter
19.
A circuit is electrically _____________ if it can carry electric current form the a short circuit directly to the Earth.
a)
neutral
b)
open
c)
insulated
d)
grounded
20.
Adding bulbs to a _________________ causes all the bulbs to shine less brightly.
a)
complete circuit
b)
open circuit
c)
parallel circuit
d)
series circuit
21.
Which circuit A or B is a series circuit?
a)
Circuit A
b)
Circuit B
22.
Which circuit A or B is a Parallel circuit?
a)
Circuit A
b)
Circuit B
23.
Which circuit diagram represents circuit B?
a)
Circuit diagram C
b)
Circuit diagram D
c)
Circuit diagram E
d)
None of the Circuit diagrams
24.
What will happen to bulb 1 in circuit A if the switch is opened?
a)
nothing
b)
bulb 1 will not light but bulb 2 and 3 will stay lit
c)
all the bulbs will go out
d)
there will be no affect to bulb 1
25.
If bulb 1 on circuit diagram E goes out what will happen to bulb 3?
a)
nothing the bulbs are in parallel so there is another pathway for the current
b)
bulb three will go out
26.
In circuit diagram D what would happen to bulbs 2 and 3 if bulb 1 goes out?
a)
Bulb two and three would go out, even though 2 & 3 are parallel to each other they are in series to bulb 1 so if bulb one goes out they all go out.
b)
Bulb two and three are in parallel to each other so nothing.
27.
this is the symbol for a _________
a)
battery
b)
switch
c)
motor
d)
bulb
28.
This is a ___________________
a)
closed switch
b)
motor
c)
open switch
d)
battery
29.
This is the symbol for a __________
a)
motor
b)
wire
c)
light bulb
d)
cell (battery)
30.
What two parts of the light bulb need to be touched by a wire in a circuit for the bulb to light?
a)
filament and screw cap
b)
the support wires and the screw cap
c)
the screw cap and the electrical contact on the bottom
d)
the glass fuse enclosure and the electrical contact on the bottom.
31.
.
What do you cn the end of the battery that connects to the circuit?
What do you cn the end of the battery that connects to the circuit?
a)
electrolyte
b)
zinc alloy electrode
c)
terminal
d)
metal case
32.
Compare and contrast permanent and electromagnets
a)
Know the differences and comparisons
b)
Don't study
33.
Why might a compass not point north if near a magnet?
a)
Study this response
b)
Don't study
34.
What does this describe?
a)
making an electromagnet
b)
making a permanent magnet
c)
recharging a permanent magnet
d)
making a temporary magnet
35.
a)
reduce the number of coils, increase power to solenoid, use stronger ferromagnetic core, wrap loops tighter
b)
increase the number of coils, increase power to solenoid, use stronger ferromagnetic core, wrap loops more loosely
c)
increase the number of coils, decrease power to solenoid, use stronger ferromagnetic core, wrap loops tighter
d)
increase the number of coils, increase power to solenoid, use stronger ferromagnetic core, wrap loops tighter
36.
which of the attempts will light up?
a)
Attempt A and Attempt D
b)
Attempt A and Attempt E
c)
Attempt A, Attempt D and Attempt E
d)
Attempt E and Attempt D
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