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Electricity
Electricity
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Electricity review for test~ #school
Flashcards
27 cards
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1
The electrical conductivity of a substance depends on the ability of the ____ in it to move.
electrons
neutrons
protons
quarks
2
The multiple paths in this circuit suggest that it is MOST LIKELY a
superconducting circuit.
parallel circuit
single-Path circuit
series circuit
3
When an object gains electrons, it becomes
positively charged
negatively charged
neutrally chaarged
magically charged
4
Current that moves in one direction from negative to positive.
Nuclear
AC/ DC
DC
AC
5
Which circuit contains the GREATEST voltage?
A circuit with 20 amps and a resistance of 16 ohms.
A circuit with a current of 20 A and a resistance of 10 ohms
A circuit with 25 amps and a resistance of 16 ohms.
A circuit with 10 amps and a resistance of 10 ohms.
6
This circuit has a single path for electrons
closed
open
parallel
series
7
When we touch a Van de Graaff generator, our hair may stand up-this happens only if our hair
attract each other.
acquire atoms.
gain negative charge.
repel each other.
8
Choose the false statement regarding resistance.
Longer wires have less resistance.
The larger the diameter of the wire, the less resistance.
Electrical resistance produces heat.
Resistance slows the flow of current.
9
This circuit is
closed and on.
open and on.
open and off.
closed and off.
10
An advantage of parallel circuits is that they
allow current to flow even if some paths are cut.
stop transmitting all current if even one resistor breaks.
divide the voltage evenly between all resistors.
form a single path through which the current flows
11
A DVD player uses 12 volts from AA batteries and draws a current of 3 A. Calculate resistance.
9 ohms
15 ohms
36 ohms
4 ohms
12
Which is an example of gaining a static charge by conduction?
Bringing a charged rod near an electroscope.
Touching your car on a cold day and getting a shock.
Rubbing a balloon against your hair.
Shuffling your shoes across a carpet.
13
According to the law of conservation of charge which statement can be true?
Charge moved from hair to a balloon
Charges are created from nothing.
A metal rod lost charge
A silk cloth gained charge.
14
If the battery on this circuit is a 9-volt battery, each light on this circuit gets
27 volts
3 volts
9 volts
0.33 volts
15
A circuit has a resistance of 2 ohms and the battery has a voltage of 12 V. What's the current?
0.167 amps
6 amps
8 amps
2 amps
16
A strand lights is plugged in. How do you know if they are connected in series or parallel?
Cut the strand in half-if half is on, it's series
Unplug the strand. If the first light stays on,it's a series
Unscrew one light. If the other lights stay on,it's a series
Unscrew one light. If other lights turn off, it's a series
17
A student brushed his dry hair for a long time & it began to stand up. Which of these happened?
The hair has become charged,the comb has remained neutral.
The comb and hair have become charged with similar charges
The comb and hair have become charged with opposite charges
The comb has become charged, the hair has remained neutral
18
One disadvantage of this type of circuit is that
as more lights are added to the circuit, voltage goes down
when one goes off the other stay on
as more lights are added to the circuit, current to goes up
the addition of new light bulbs decreases resistance.
19
The potential energy of an electric circuit is measured in units of
watts
volts
amperes
ohms
20
As you get close to the TV, hairs on your arm start to stand up. This shows what type of static
conduction.
friction.
induction.
convection.
21
Emma wants to negatively charge a small plastic ball.Which of these methods would be a success?
running the ball over a strong magnet
heating the ball in boiling water
rubbing the ball back and forth on carpet
dropping the ball from a tall bulding
22
Based on the diagram of the two electrical circuits, which circuit will draw more power?
The series circuit will draw more power.
The parallel circuit will draw more power.
the circuits will draw equal amounts of power.
It cannot be determined without knowing the resistance.
23
What process is the method by which a neutral object obtains an electrical charge?
radiation
convection
discharge
conduction
24
In the image shown, the light bulb is on. In order for this to happen, the circuit must be
parallel.
open.
closed.
series.
25
The picture shows what kind of circuit?
closed
open
parallel
series
26
What creates static charge?
magnetic domains
electrons
protons
heat energy
27
You rub a balloon on your head & it becomes negative. The balloon will be MOST attracted to
another negatively charged balloon.
a piece of metal.
positively charged hair.
the neutrally charged wall.
