P1 - Energy for the Home

Descripción

OCR specification, physics higher tier.
Izzy Backhouse
Test por Izzy Backhouse, actualizado hace más de 1 año
Izzy Backhouse
Creado por Izzy Backhouse hace más de 9 años
39
3

Resumen del Recurso

Pregunta 1

Pregunta
What colours on a thermogram represent hot temperatures?
Respuesta
  • White
  • Blue
  • Yellow
  • Red
  • Black
  • Purple

Pregunta 2

Pregunta
Define: Temperature
Respuesta
  • = a measurement of energy on an absolute scale.
  • = a measurement of the average kinetic energy of particles.
  • = total energy of all particles.

Pregunta 3

Pregunta
Thermal energy always flows from a hotter area to a cooler one.
Respuesta
  • True
  • False

Pregunta 4

Pregunta
What is the equation for specific heat capacity?
Respuesta
  • energy / (mass x temperature change)
  • energy / mass

Pregunta 5

Pregunta
When a substance melts or solidifies there is no temperature change.
Respuesta
  • True
  • False

Pregunta 6

Pregunta
The kinetic energy of particles increases at colder temperatures.
Respuesta
  • True
  • False

Pregunta 7

Pregunta
What does arrow A on this graph showing changes of states represent?
Respuesta
  • Melting
  • Boiling
  • Freezing
  • Condensing

Pregunta 8

Pregunta
What does arrow B on the graph showing the changes of state of water represent?
Respuesta
  • Melting
  • Boiling
  • Freezing
  • Condensing

Pregunta 9

Pregunta
What are the 3 types of thermal transfer?
Respuesta
  • Conduction
  • Radiation
  • Nuclear
  • Convection
  • Sun

Pregunta 10

Pregunta
Conduction can work in solids because the particles pass their energy to neighbouring particles.
Respuesta
  • True
  • False

Pregunta 11

Pregunta
Warmer regions of a fluid are more dense than cooler regions of fluid.
Respuesta
  • True
  • False

Pregunta 12

Pregunta
What 2 surfaces are the best for absorbing and emitting radiation?
Respuesta
  • Black
  • Shiny
  • White
  • Matt
  • Silver

Pregunta 13

Pregunta
Which of the options below are methods of insulation?
Respuesta
  • Curtains and draught excluders
  • Cavity walls
  • Double glazing
  • Carpets and underfloor insulation
  • Reflective foil behind radiators

Pregunta 14

Pregunta
What is this a diagram showing?
Respuesta
  • Energy flow
  • Wasted energy
  • Efficiency
  • Useful energy

Pregunta 15

Pregunta
The higher the efficiency the less energy is wasted.
Respuesta
  • True
  • False

Pregunta 16

Pregunta
If you put ice cubes in a glass, why do they melt?
Respuesta
  • The ice cubes cool the surroundings.
  • The surroundings transfer heat to the ice cubes.
  • The ice cubes need to be kept in the freezer.

Pregunta 17

Pregunta
What is the definition of a wave?
Respuesta
  • The transfer of energy without the transfer of matter.
  • The movement of energy through water.
  • The movement of particles in any surface/object.

Pregunta 18

Pregunta
The definition of a longitudinal wave is...
Respuesta
  • ...when the displacement is perpendicular to the direction of the wave.
  • ...when the displacement is parallel to the direction of the wave.

Pregunta 19

Pregunta
Define: Frequency
Respuesta
  • = the number of complete waves to pass a point in 1 second.
  • = the time taken for one wave to pass a point.

Pregunta 20

Pregunta
Light travels in straight lines.
Respuesta
  • True
  • False

Pregunta 21

Pregunta
In the reflection of light, the angle of incidence is greater than the angle of reflection.
Respuesta
  • True
  • False

Pregunta 22

Pregunta
How does the speed of light change when it enters a denser material?
Respuesta
  • It speeds up
  • It slows down
  • It doesn't change
  • It stops

Pregunta 23

Pregunta
In refraction, the emergent ray bends towards the normal.
Respuesta
  • True
  • False

Pregunta 24

Pregunta
Define: Diffraction
Respuesta
  • = the bending of light.
  • = the bending of waves through a hole or around an obstacle.
  • = the trajectory of a wave.

Pregunta 25

Pregunta
Which of the 3 statements below are true about ionising waves?
Respuesta
  • They have a severe effect on living tissue by killing cells or damaging DNA.
  • They are harmless to humans.
  • They have a short wavelength and high frequency.
  • They carry lots of energy.
  • They have a long wavelength and low frequency.

Pregunta 26

Pregunta
What is the order of the waves in the electromagnetic spectrum? (starting with highest frequency and shortest wavelength)
Respuesta
  • X-Ray, Ultraviolet, Visible, Infrared, Microwaves, Gamma, Radio waves
  • Gamma, X-Ray, Ultraviolet, Visible, Infrared, Microwaves, Radio waves
  • Gamma, Ultraviolet, Visible, X-Ray, Infrared, Microwaves, Radio waves
  • Radio waves, Gamma, X-Ray, Visible, Infrared, Ultraviolet, Microwaves,

Pregunta 27

Pregunta
Which of the following are uses of gamma waves?
Respuesta
  • Tanning Machines
  • Treating cancer
  • TV remote
  • Sterilising medical instruments
  • Seeing bones

Pregunta 28

Pregunta
Select the 3 properties off Infrared waves.
Respuesta
  • They can burn human tissue by transferring their energy to our skin.
  • They are reflected by metal surfaces.
  • They can't penetrate materials such as plastic and glass.
  • They are harmless to humans.
  • They can pass through glass and plastic.

Pregunta 29

Pregunta
Infrared waves are absorbed by food during cooking.
Respuesta
  • True
  • False

Pregunta 30

Pregunta
How does a microwave oven cook food?
Respuesta
  • The fan reflects waves from the turbine. They fill the oven and cook the food.
  • The fan reflects waves from the generator. They bounce off the walls and cook the food.
  • The fan reflects waves from the magnetron. They reflect off the walls and cook the food.

Pregunta 31

Pregunta
What is the critical angle of glass?
Respuesta
  • 40 degrees
  • 41 degrees
  • 42 degrees

Pregunta 32

Pregunta
What is one benefit for patients when using an endoscope?
Respuesta
  • Patients will have a quicker recovery time as the surgery is less intrusive so no risk of infection.
  • The operation hurts less.
  • The doctor doesn't have to use a knife.

Pregunta 33

Pregunta
What are the 2 methods that can be used for multiplexing?
Respuesta
  • Different colours
  • Different sizes
  • Different times
  • Different divisions

Pregunta 34

Pregunta
An analogue signal varies continuously in amplitude and frequency.
Respuesta
  • True
  • False
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