# Unit 6 - Electricity

## Quiz by Kate Downey

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29 questions
• Q1
Both light bulbs are lit in the circuit above. If one of the lights shut off and the other stays on, what kind of circuit is this?
series
parallel
electromagnetic
induction
30s
• Q2
Which of the following is shown in this diagram?
parallel
DC
series
AC
30s
• Q3
Insulation materials reduce heat loss because they —
are poor conductors
promote convection
allow the flow of electrons
are good conductors
30s
• Q4
Current flowing in only one direction is called direct current.
true
false
30s
• Q5
Oscillating current is called
series current
AC
DC
parallel current
30s
• Q6
Alternating current is when the current changes direction every 120 times per second.
true
false
30s
• Q7
The current in our wall outlets and light sockets is
AC
60 ohms
DC
both AC and DC
30s
• Q8
What is the unit for voltage?
joules
amps
volts
ohm's
30s
• Q9
What is the unit for current?
ohm's
volts
netwons
amps
30s
• Q10
What is the unit for resistance?
ohm's
newtons
volts
amps
30s
• Q11
Give the equation for Ohm's Law.
R = IV
PE = mgh
V = IR
I = V/R
30s
• Q12
The resistance of a hotplate is 48 Ω . How much current does the plate carry when connected to a 120-V source?
none of the above
5760 amps
.4 amps
2.5 amps
30s
• Q13
A certain steam iron carries a current of 6.4 A when connected to a 120 V source. What is the resistance of the steam iron?
.05 ohms
18.75 ohm's
18.75 amps
768 ohm's
30s
• Q14
Any magnet has two ends, each one is called a _______.
electromagnetism
magnet
magnetic material
magnetic pole
30s
• Q15
If two magnets were in this order: NS SN (south and south facing eachother) they would
attract to one another
repel eachother
30s

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