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- 1. Multiple Choice
Which one of the following best describes electric current?
electric charges built on an object.
how easy it is for current to flow in the circuit.
flow of electrons, which are negatively charged particles.
- 2. Multiple Choice
Which one of the following show the components needed for a complete electric circuit?
bulbs and wires.
wires, bulb, and switch.
wires, bulb, switch, battery.
battery, wires, and switch.
- 3. Multiple Choice
Which one of the following is true for series circuit?
the current is same everywhere in the circuit.
each bulb can be controlled individually.
if you add more bulbs, other bulbs are not affected.
the current splits up in the circuit when it comes to junction.
- 4. Multiple Choice
A series circuit has two bulbs in it. One bulb is removed from it. What happens to the other bulb?
Its brightness will increase.
the bulb will not lit up.
it will dim the brightness of light.
the bulb brightness will remain the same.
- 5. Multiple Choice
Ammeter is connected in _________________ to measure the current flowing through a circuit.
parallel
across
series
across from the cell.
- 6. Multiple Choice
The ________________ across a cell is a measure of the energy provided by the cell.
current
ampere
resistance
voltage
- 7. Multiple Choice
In a parallel series, the current splits up when _____
it continues in the straight path.
it goes through electrical components.
it comes to a junction.
- 8. Multiple Choice
What is the unit of resistance?
ampere
volts
ohms
newton
- 9. Multiple Choice
In parallel series, the voltages across all the components add up to the voltage across the cell.
Is this sentence true or false?
True
False
- 10. Multiple Choice
What will be the voltage across the electrical components?
3 V
6 V
12 V
3 V and 9 V
- 11. Multiple Choice
What is the function of insulator in current electricity?
they are used for protection in a circuit.
they are used to allow electricity to flow in a circuit.
they are used to decreases resistance in a circuit.
- 12. Multiple Choice
Why conductors can allow electricity to flow through them?
they have lose protons.
they have do not have electrons.
they have lose electrons.
they have high resistance.
- 13. Multiple Choice
Which one of the following can conduct electricity?
copper
plastic
rubber
wood
- 14. Multiple Choice
Current flowing through a circuit depends on which two factors?
voltage of the cell or power source and length of wire
voltage of the cell and how easy it is for current to flow through the components.
How easy it is for current to flow through the components and the material of wires.
- 15. Multiple Choice
Resistance can be added to a circuit using components called
ammeter
voltmeter
resistors
- 16. Multiple Choice
The resistance of a wires depends on _______
the length of wire
thickness of wire
the metal it is made from
all th above.
- 17. Multiple Choice
All metals conduct electricity.
Is this sentence True or False?
True
False
- 18. Multiple Choice
Insulating materials have _________________.
low resistance
no resistance
high resistance
- 19. Multiple Choice
Which formula is correct for calculating voltage?
voltage = current x resistance
voltage = current / voltage
voltage = voltage / current
- 20. Multiple Choice
What voltage do you need to make a 3 A current flow around a circuit with a resistance of 6 Ω?
2 V
1 / 2 V
18 V
- 21. Multiple Choice
What is the resistance of a bulb when the voltage across it is 20 V and the current is 2 A?
1 / 10 Ω
40 Ω
10 Ω
- 22. Multiple Choice
Calculate the current flowing when the voltage across is 35 V and resistance is 7 Ω?
1 / 5 A
245 A
5 A
- 23. Multiple Choice
In the following, select all the materials with high resistance:
copper
plastic
rubber
silver
glass
- 24. Multiple Choice
What will happen to a wood if you try to pass current through it?
it will burn.
it will melt.
it will conduct electricity.
- 25. Multiple Choice
Which one of the following particles in an atom have positive charge?
neutron
electron
proton
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