12650981
Descripción
Test por Jeffrey Piggott, actualizado hace más de 1 año
|
Creado por Jeffrey Piggott
hace casi 7 años
|
|
Pregunta 1
Pregunta
Which of these statements is true?
Respuesta
-
A) Plastic is a conductor because it lets electricity flow through it.
-
B) Plastic is an insulator because it lets electricity flow through it.
-
C) Metals are conductors because they let electricity flow through them.
-
D) Metals are insulators because they let electricity flow through them.
Pregunta 2
Respuesta
-
A) a cell and a bulb
-
B) a cell and a switch
-
C) a bulb and a switch
-
D a switch and a motor
Pregunta 3
Pregunta
Which instrument would you use to measure electric current?
Respuesta
-
A) an ammeter
-
B) a cell
-
C) a motor
-
D) a voltmeter
Pregunta 4
Respuesta
-
A) It would be biggest at X and smallest at Z. .
-
B) It would be biggest at Z and smallest at X
-
C) There would be no current at Y.
-
D) It would be the same at all three places.
Pregunta 5
Pregunta
You can make the current in a circuit smaller by:
Respuesta
-
A) putting a switch in the circuit.
-
B) putting more bulbs in the circuit.
-
C) taking some bulbs out of the circuit.
-
D) putting more cells in the circuit.
Pregunta 6
Pregunta
" Resistance" is a way of saying:
Respuesta
-
A) how much electricity is flowing.
-
B) how hard it is for electricity to flow.
-
C) how many cells are in a circuit.
-
D) how many switches are in a circuit.
Pregunta 7
Pregunta
Electricity is:
Respuesta
-
A) a source of energy.
-
B) a kind of liquid inside the wires.
-
C) tiny particles called electrons flowing through the wires.
-
D) tiny particles called atoms flowing through the wires.
Pregunta 8
Pregunta
A long wire:
Respuesta
-
A) has a smaller resistance than a short wire.
-
B) has the same resistance as a short wire.
-
C) has a bigger resistance than a short wire.
-
D) does not have resistance.
Pregunta 9
Respuesta
-
A) X and Y only
-
B) X and Z only
-
C) Y and Z only
-
D) all of them
Pregunta 10
Pregunta
Which switches must be pressed to make bulb X come on?
Respuesta
-
A) 1 and 2 only
-
B) 1 and 3 only
-
C) 2 and 3 only
-
D) all three of them
Pregunta 11
Pregunta
Parallel circuits are used for house lights:
Respuesta
-
A) so they can all be switched on and off together.
-
B) so you know when one breaks, because all the others go off
-
C) so they use a bigger current.
-
D) so they can all be switched on and off separately.
Pregunta 12
Pregunta
Which of the statements about this circuit can not be true?
Respuesta
-
A) The currents at Q and R add up to give the current at S.
-
B) The current is the same at P and S.
-
C) The current is the same at Q and R.
-
D) The current is the same at P and Q
Pregunta 13
Pregunta
When electricity flows through wires:
Respuesta
-
A) they melt.
-
B) they get cold.
-
C) they get hot.
-
D) nothing changes.
Pregunta 14
Pregunta
A fuse is:
Respuesta
-
A) a metal strip that bends when it is hot
-
B) a piece of wire that melts when it gets too hot.
-
C) a piece of plastic that does not let electricity through.
-
D) the part of a plug that sticks into a socket.
Pregunta 15
Pregunta
An electric heater has a current of 10 A flowing through it.
Which fuse should be used?
Respuesta
-
A) 3 A
-
B) 5 A
-
C) 13 A
-
D) 30 A
Pregunta 16
Pregunta
A fuse is used to:
Respuesta
-
A) heat things.
-
B) make things move.
-
C) control the temperature of something.
-
D) stop electricity flowing if something is wrong.
Pregunta 17
Pregunta
If you touch electrical equipment with wet hands:
Respuesta
-
A) you might damage the equipment.
-
B) you could get an electrical shock
-
C) you might get your hands dirty.
-
D) you might make the equipment dirty.
Pregunta 18
Pregunta
What happens if a large electrical current flows through your body?
Respuesta
-
A) Your heart could stop working.
-
B) Your eyeballs could explode.
-
C) Nothing at all.
-
D) It will improve your circulation.
¿Quieres crear tus propios Tests gratis con GoConqr? Más información.