117378
Descripción
Test por Joe Waymouth, actualizado hace más de 1 año
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Creado por Joe Waymouth
hace casi 11 años
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Pregunta 1
Pregunta
What type of matirial can become staticly charged?
Respuesta
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An insulator
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A non conducter
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A conductor
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A non insulator
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An insulator or conductor
Pregunta 2
Pregunta
What is transferred from one object to another when one becomes static?
Respuesta
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Protons
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Neutrons
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Electons
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Protons, Neutrons and electrons
Pregunta 3
Pregunta
What charge are electrons?
Respuesta
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Positive
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Negitive
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Neutral
Pregunta 4
Pregunta
How can you discharge static electricity?
Respuesta
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Earthing it
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Grounding it
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Flooring it
Pregunta 5
Pregunta
Two objects with the same charge will...
Respuesta
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repel each other
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attract each other
Pregunta 6
Pregunta
The atoms or molecules that become charged are called...
Respuesta
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ions
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opposites
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static
Pregunta 7
Pregunta
Why is a plane earthed when it is refuelled?
Respuesta
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So the static electricity does not spark near the flammable liquid
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So it doesn't blow away
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So the static electricity cant shock anyone in the plane
Pregunta 8
Pregunta
What is resistance measured in?
Respuesta
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ohms
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ounces
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volts
Pregunta 9
Pregunta
How do you work out resistance?
Respuesta
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Voltage / Current
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Current / Voltage
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Current * Voltage
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Current / Amps
Pregunta 10
Pregunta
What colour is the live wire?
Respuesta
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Blue
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Brown
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Yellow and green
Pregunta 11
Pregunta
What colour is the neutral wire?
Respuesta
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Blue
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Brown
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Yellow and green
Pregunta 12
Pregunta
What colour is the earth wire?
Respuesta
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Blue
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Brown
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Yellow and green
Pregunta 13
Pregunta
Why do electrical devices have fuses?
Respuesta
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So the device is protected from a power surge
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So the device doesn't work too hard
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So you can turn the device off easly
Pregunta 14
Pregunta
Why do metal devices have earth wires?
Respuesta
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So that if there is an electrical fault and the outer casing becomes charged it will earth through the earth wire and not through someone touching it
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To get power
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To make the fuse work
Pregunta 15
Pregunta
What is the symbol for a double insulated device?
Respuesta
-
A square inside another square
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A triangle inside another triangle
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A circle inside another circle
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A hexagon inside another hexagon
Pregunta 16
Pregunta
Ultrasound has a frequency of more than how many hertz?
Respuesta
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20000
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10000
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15000
Pregunta 17
Pregunta
which type of nuclear radiation is a wave?
Respuesta
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Alpha
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Beta
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Gamma
Pregunta 18
Pregunta
An atom that has lost an electron has a ______ charge?
Respuesta
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positive
-
neutral
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negative
Pregunta 19
Pregunta
What is half life?
Respuesta
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The time it takes for a radioactive source to decay
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The time it takes for half a radioactive source to decay
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Half the time a radioactive source takes to kill someone
Pregunta 20
Pregunta
What material will stop gamma radiation?
Respuesta
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Paper
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Aliminium
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Lead
Pregunta 21
Pregunta
Which one of these is a way of using gamma in hospitals?
Respuesta
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To sterilise objects
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To remove a kidney stone
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To scan an unborn baby
Pregunta 22
Pregunta
Splitting an atom is...
Respuesta
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Fussion
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Fission
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Fession
Pregunta 23
Pregunta
How does radioactivity change over time?
Respuesta
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It increases
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It decreases
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It stays the same
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