WorksheetsNS Gr9 Electricity Revision Part 1
Total questions: 16
Worksheet time: 8mins
A circuit consists of 2 cells in series, a bulb, an Ammeter, and a switch. The following statement in relation to this circuit is true:
The cells provide kinetic energy to the circuit
A current will only flow if the switch is open
The flow of charge provides potential energy
The 2 cells connected together form a battery
The unit of measurement of the resistance of a bulb is:
Volt
Ampere
Ohm
Lux
The best material for the filament of a bulb would be:
Tungsten
Copper
PVC
Neon
A circuit consists of 2 cells in series, a bulb, an Ammeter, and a switch. A 1cm nichrome wire is added in series in the circuit and the switch is closed.
The current will flow more strongly
The bulb will be dimmer
The temperature in the nichrome wire will decrease
The bulb will glow more brightly
The resistor in a toaster causes the electrical energy to be converted into:
Sound and light energy
Heat and electrical energy
Heat and light energy
Sound and heat energy
The following statement is true of resistors:
Resistors restrict the flow of current
Resistors allow for the free flow of electricity
Resistors do not allow the flow of current through them
Resistors increase the flow of current in a circuit
A series circuit consists of 2 cells in series, 2 identical tungsten bulbs, an ammeter and an open switch. The following statement is true about this circuit:
The flow of current will be clockwise
The current will not flow because the switch is open
The current will flow from the positive to negative terminal of the battery
The currrent will flow from the negative to the positive terminal of the battery
A series circuit consists of 2 cells in series, 2 identical tungsten bulbs, an ammeter and a closed switch. A voltmeter is added to the circuit to measure the potential difference of the battery. The following statement is true about the voltmeter:
The voltmeter must be connected in series after the positive terminal of the battery
The voltmeter, according to Ohms Law, must be connected in parallel across the ammeter
The voltmeter can be connected anywhere in the circuit because the potential difference is the same throughout the circuit
The voltmeter must be connected in parallel across the 2 cells of the battery
A series circuit consists of 2 cells in series, 2 identical tungsten bulbs, an ammeter and a closed switch. A voltmeter is connected across the battery. The following statements are all true about the bulbs, except:
They will both glow equally brightly
If one bulb goes out, they both will go out because the circuit is broken
The bulb closest to the positive terminal of the battery will be brughtest
They will both have the same potential difference
A series circuit consists of 2 cells in series, 2 identical tungsten bulbs, an ammeter and a closed switch. A voltmeter is connected across the battery. The following statement is true about the Ammeter reading:
It is measuring the number of Ohms in the circuit
It needs to be connected in parallel
Never mind where you put it in the series circuit, it will show the identical reading
The reading will get less the further the ammeter is away from the positive terminal of the battery
A series circuit consists of 2 cells in series, 2 identical tungsten bulbs, an ammeter and a closed switch. A voltmeter is connected across the battery. If the resistance of each bulb is 15 Ohms, and each cell has a potential difference of 5 Volts, the following statement is true:
The voltmeter reading will be 5V
The total resistance in the circuit is 30 Ohms
The voltmeter will show a reading of 7,5V
The total resistance in the circuit will be 7,5 Ohms
A series circuit consists of 3 cells in series, 2 identical tungsten bulbs, an ammeter and a closed switch. A voltmeter is connected across the battery. If the resistance of each bulb is 15 Ohms, and each cell has a potential difference of 5 Volts, the following statement is true:
The ammeter reading will be:
5 A
The ammeter reading will be:
15 A
The ammeter reading will be:
500 mA
The ammeter reading will be:
50 mA
Household circuits are connected in parallel. The disadvantage of ths is:
The resistance will be high and use a lot of electricity
The bulbs will fuse more frequently
Too many conductors connected to one source could cause a circuit overload
People forget to switch lights off and waste electricity
The total current in a circuit with resistors connected in parallel will:
Decrease if you add more resistors in parallel
Increase if you add more resistors in parallel
Remain constant irrespective of the number of resistors
Decrease with fewer resistors in parallel
Two bulbs, B1 and B2, are connected in parallel in a circuit. The circuit has 3 cells (each with a PD of 1,5V) in series and an ammeter is used to measure the current in the main circuit. It shows a reading of 1,8A. The total resistance of bulbs B1 and B2 will be:
1.667 Ohms
2,5 Ohms
0.6 Ohms
1.5 Ohms
Two bulbs, B1 and B2, are connected in parallel in a circuit. They each have a resistance of 2 Ohms. A dimmer switch is added in parallel to the bulbs. The dimmer switch is set to a resistance of 4 Ohms. The total resistance will now be:
10 Ohms
1.25 Ohms
0.8 Ohms
8 Ohms
