Test
P1 - Energy for the Home
Crea una cuenta gratis para terminar este test
Guarda tu progreso y consulta tu resultado final.
¿Ya tienes cuenta? Inicia sesión
Preguntas del test (34)
1What colours on a thermogram represent hot temperatures?
- AWhite
- BBlue
- CYellow
- DRed
- EBlack
- FPurple
2Define: Temperature
- A= a measurement of energy on an absolute scale.
- B= a measurement of the average kinetic energy of particles.
- C= total energy of all particles.
3Thermal energy always flows from a hotter area to a cooler one.
- AVerdadero
- BFalso
4What is the equation for specific heat capacity?
- Aenergy / (mass x temperature change)
- Benergy / mass
- Aenergy / (mass x temperature change)
5When a substance melts or solidifies there is no temperature change.
- AVerdadero
- BFalso
6The kinetic energy of particles increases at colder temperatures.
- AVerdadero
- BFalso
7What does arrow A on this graph showing changes of states represent?
- AMelting
- BBoiling
- CFreezing
- DCondensing
8What does arrow B on the graph showing the changes of state of water represent?
- AMelting
- BBoiling
- CFreezing
- DCondensing
9What are the 3 types of thermal transfer?
- AConduction
- BRadiation
- CNuclear
- DConvection
- ESun
10Conduction can work in solids because the particles pass their energy to neighbouring particles.
- AVerdadero
- BFalso
11Warmer regions of a fluid are more dense than cooler regions of fluid.
- AVerdadero
- BFalso
12What 2 surfaces are the best for absorbing and emitting radiation?
- ABlack
- BShiny
- CWhite
- DMatt
- ESilver
13Which of the options below are methods of insulation?
- ACurtains and draught excluders
- BCavity walls
- CDouble glazing
- DCarpets and underfloor insulation
- EReflective foil behind radiators
14What is this a diagram showing?
- AEnergy flow
- BWasted energy
- CEfficiency
- DUseful energy
15The higher the efficiency the less energy is wasted.
- AVerdadero
- BFalso
16If you put ice cubes in a glass, why do they melt?
- AThe ice cubes cool the surroundings.
- BThe surroundings transfer heat to the ice cubes.
- CThe ice cubes need to be kept in the freezer.
17What is the definition of a wave?
- AThe transfer of energy without the transfer of matter.
- BThe movement of energy through water.
- CThe movement of particles in any surface/object.
18The definition of a longitudinal wave is...
- A...when the displacement is perpendicular to the direction of the wave.
- B...when the displacement is parallel to the direction of the wave.
19Define: Frequency
- A= the number of complete waves to pass a point in 1 second.
- B = the time taken for one wave to pass a point.
20Light travels in straight lines.
- AVerdadero
- BFalso
21In the reflection of light, the angle of incidence is greater than the angle of reflection.
- AVerdadero
- BFalso
22How does the speed of light change when it enters a denser material?
- AIt speeds up
- BIt slows down
- CIt doesn't change
- DIt stops
23In refraction, the emergent ray bends towards the normal.
- AVerdadero
- BFalso
24Define: Diffraction
- A= the bending of light.
- B= the bending of waves through a hole or around an obstacle.
- C= the trajectory of a wave.
25Which of the 3 statements below are true about ionising waves?
- AThey have a severe effect on living tissue by killing cells or damaging DNA.
- BThey are harmless to humans.
- CThey have a short wavelength and high frequency.
- DThey carry lots of energy.
- EThey have a long wavelength and low frequency.
26What is the order of the waves in the electromagnetic spectrum? (starting with highest frequency and shortest wavelength)
- AX-Ray, Ultraviolet, Visible, Infrared, Microwaves, Gamma, Radio waves
- BGamma, X-Ray, Ultraviolet, Visible, Infrared, Microwaves, Radio waves
- CGamma, Ultraviolet, Visible, X-Ray, Infrared, Microwaves, Radio waves
- DRadio waves, Gamma, X-Ray, Visible, Infrared, Ultraviolet, Microwaves,
27Which of the following are uses of gamma waves?
- ATanning Machines
- BTreating cancer
- CTV remote
- DSterilising medical instruments
- ESeeing bones
28Select the 3 properties off Infrared waves.
- AThey can burn human tissue by transferring their energy to our skin.
- BThey are reflected by metal surfaces.
- CThey can't penetrate materials such as plastic and glass.
- DThey are harmless to humans.
- EThey can pass through glass and plastic.
29Infrared waves are absorbed by food during cooking.
- AVerdadero
- BFalso
30How does a microwave oven cook food?
- AThe fan reflects waves from the turbine. They fill the oven and cook the food.
- BThe fan reflects waves from the generator. They bounce off the walls and cook the food.
- CThe fan reflects waves from the magnetron. They reflect off the walls and cook the food.
31What is the critical angle of glass?
- A40 degrees
- B41 degrees
- C42 degrees
32What is one benefit for patients when using an endoscope?
- APatients will have a quicker recovery time as the surgery is less intrusive so no risk of infection.
- BThe operation hurts less.
- CThe doctor doesn't have to use a knife.
33What are the 2 methods that can be used for multiplexing?
- ADifferent colours
- BDifferent sizes
- CDifferent times
- DDifferent divisions
34An analogue signal varies continuously in amplitude and frequency.
- AVerdadero
- BFalso
Información
- Descripción
- OCR specification, physics higher tier.
- Autor
- Izzy Backhouse
- Idioma
- English
- Visitas
- 44
- Etiquetas
- Valoración
- 4,0 de 5 · 1 valoración Valora este test