Electricity and Circuits Light bulb converts electrical energy into i chemical energy ii light energy iii heat energy Only i and ii Only i and iii ID: 390773
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Slide1
Quiz on
Electricity and Circuits Slide2
Light
bulb converts electrical energy into (i) chemical energy (ii) light energy (iii) heat energy
Only (i) and (ii)
Only (i) and (iii)
Only (ii) and (iii)
(i)、(ii) and (iii)Slide3
2.
Which of the followings are the conditions for electricity to flow?a source of electrical energy(ii) a light bulb(iii) a switch(iv) a closed circuit
Only (i) and (ii)
Only (i) and (iv)
(
i)、(ii) and (iii)(
i
)
、
(ii)
、
(iii)and (iv)Slide4
3. Conductors
allow electric current to flow through. It is becausethey have a lot of neutrons.they have a lot of atoms.they have a lot of free electrons.
they have a lot of protons.Slide5
4. The
current flowing through a domestic washing machine is approximately 1A2A5A
10ASlide6
5.
Which of the following is used to limit the size of current in a circuit? ammetervoltmeter
resistorswitchSlide7
6. Which
of the following component in circuit allows us to vary the resistance? AmmeterVoltmeterRheostat
SwitchSlide8
7.
Which of the following is the symbol for a switch?Slide9
7.
Which of the following has the smallest resistance?A piece of short and thick copper wireA piece of long and thick copper wire
A piece of long and thick nichrome wire
A piece of short and thin nichrome wireSlide10
8. Which of the following electrical devices should be connected in series?
(i) ammeter (ii) voltmeter (iii) resistorOnly (i
) and (ii)Only (ii) and (iii)
Only (i) and (iii)
(
i)、(ii) and (iii)Slide11
9.
Which of the following about parallel circuit is NOT correct?There are 2 or more branches of electric current in a parallel circuit. Total current in the circuit equals to the sum of current in all branches.
In a parallel circuit, if a bulb from one branch burns out, bulbs from other branches will not light up.
In a parallel circuit, the electric current is larger in a branch with smaller resistance
.Slide12
10.
Which of the following is the hottest one when the same amount of current pass through them?A piece of short and thick copper wire
A piece of long and thick copper wireA piece of long and thin
nichrome wireA piece of short and thin
nichrome wireSlide13
11.
Which of the following electrical appliance is NOT making use of the heating effect of electric current?Rice cookerelectric heater
Heat plate
electric doorbellSlide14
Which of the following acts like a fuse to protect the circuit and prevent overloading ? rheostatswitchCircuit breaker
ammeter