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Worksheets17 Electricity 2022J
Total questions: 22
Worksheet time: 13mins
A large battery is labelled with various items of information about the battery. 12 V 30 kg 216 kJ 680 A One of these items of information is the electromotive force (e.m.f.) of the battery. What is the e.m.f. of the battery?
12 V
30 kg
216 kJ
680 A
The circuit shown is being used to measure the resistance of resistor Z.
What is the correct combination of meter X and meter Y to determine the resistance of resistor Z?
ammeter; ammeter
ammeter; voltmeter
voltmeter; ammeter
voltmeter; voltmeter
The diagram shows the circuit diagram symbol of an electrical component.
Which component does the symbol represent?
light-dependent resistor
relay coil
thermistor
variable resistor
What is the advantage of connecting lamps in parallel in a lighting circuit?
A smaller fuse is needed to protect the lamps.
If the filament of one lamp breaks, the remaining lamps stay lit.
The current taken from the supply is less.
The lamps use less power.
The diagram shows a circuit of six identical lamps connected to a battery.
Which lamps are brightest?
P only
Q and R only
S, T and U only
P, Q, R, S, T and U are equally bright
Why is a fuse used in an electrical circuit?
so that the current can have only one value
to prevent the current becoming too large
to provide a path to earth if a fault occurs
to save electrical energy
Four circuits are set up.
In which circuit does the meter measure the potential difference (p.d.) across the resistor?
(a)
A resistor has a potential difference (p.d.) of 12 V across it and a current of 0.60 A in it. What is the resistance of the resistor?
0.05Ω
2.0Ω
7.2Ω
20Ω
Which circuit is correctly labelled?
(a)
Which statement describes the current from the power supply?
greater than IX and greater than IY
greater than IX and less than IY
less than IX and greater than IY
less than IX and less than IY
The diagram shows a battery connected to a potential divider and to two lamps, P and Q.
The slider on the potential divider is moved from end X to end Y of the resistor.
Which row shows the effect on the brightness of each lamp?
P: brighter, Q: brighter
P: brighter, Q: dimmer
P: unchanged, Q: brighter
P: unchanged, Q: dimmer
Which circuit shows a meter being used correctly to measure the current in a resistor?
(a)
A resistor and a battery are connected in series. The value of the resistor is 20Ω. The potential difference (p.d.) of the battery is 4.0V. What is the current in the resistor?
0.20 A
4.0 A
5.0 A
80 A
The circuit shown includes a cell.
Which other components does the circuit contain?
lamp, voltmeter and switch
resistor, thermistor and bell
switch, variable resistor and heater
switch, heater and fuse
Two 4Ω resistors are connected in parallel. What is the combined resistance between X and Y?
less than 4Ω
4Ω
8Ω
more than 8Ω
Which statement about identical lamps in a parallel circuit is not correct?
If one lamp blows, the others remain switched on.
The current in each lamp is different.
The lamps can be switched on and off separately.
The lamps have the same voltage across each of them.
The information describes the currents in three different circuits. Circuit P has a steady current of 0.52 A in one direction. Circuit Q has a current that continually changes between 0.25 A and 0.35 A but is always in the same one direction. Circuit R has a peak current of 0.52 A that changes direction periodically. Which circuits contain a direct current?
P only
P and Q
Q and R
R only
Which unit is equivalent to a volt (V)?
A/Ω
J/C
J/s
W/C
A resistor converts 360 J of energy when there is a current of 3.0 A in it. The potential difference across the resistor is 6.0 V. For how long is there this current in the resistor?
0.05 s
20 s
180 s
720 s
The four circuits shown each contain four diodes.
In which circuit is the direction of the current in the resistor always from the red terminal to the black terminal?
(a)
There is a current I in a resistor of resistance R for a time t. The potential difference (p.d.) across the resistor is V. Which equation gives the power P dissipated in the resistor?
P = IR
P = It
P = IV
P = IV/t
There is a current I in a resistor for a time t. The potential difference (p.d.) across the resistor is V. A student calculates the product IVt. In which unit is the student’s answer measured?
ampere
coulomb
joule
watt
