Craville Studies
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They travelled in straight lines Opaque objects caused them to make a shadow They left the cathode at right angles to the surface They passed through thin metal foils without damaging them Leaving the cathode at right angles to surface is indeed what cathode rays do, however, that property is characteristic of a particle, not a wave.
They travelled in straight lines Opaque objects caused them to make a shadow They left the cathode at right angles to the surface They passed through thin metal foils without damaging them
Leaving the cathode at right angles to surface is indeed what cathode rays do, however, that property is characteristic of a particle, not a wave.
The electrons travel from the cathode to the anode Cathode ray tubes use a low voltage Magnetic fields will distort the path taken by the rays Electric fields will distort the path taken by the rays Cathode ray tubes actually use a high voltage.
The electrons travel from the cathode to the anode Cathode ray tubes use a low voltage Magnetic fields will distort the path taken by the rays Electric fields will distort the path taken by the rays
Cathode ray tubes actually use a high voltage.
Black body radiation He was the first to discover radio waves Using an induction coil and a spark gap, he succeeded in generating and detecting electromagnetic waves He demonstrated radio waves had properties characteristic of light Planck discovered Black Body radiation.
Black body radiation He was the first to discover radio waves Using an induction coil and a spark gap, he succeeded in generating and detecting electromagnetic waves He demonstrated radio waves had properties characteristic of light
Planck discovered Black Body radiation.
1788 1838 1888 1938
Energy is not continuous, it is in discrete amounts called quanta Emission and absorption of black body radiation is quantised A photon can only transfer some or none of its energy, not all of it. Energy associated with radiation from black bodies is called photons Both (a) and (b) were statements made by Planck. (c) looks good until you look closely. A photon can only transfer all or none of its energy, not part of it. (d) is indeed what Einstein said.
Energy is not continuous, it is in discrete amounts called quanta Emission and absorption of black body radiation is quantised A photon can only transfer some or none of its energy, not all of it. Energy associated with radiation from black bodies is called photons
Both (a) and (b) were statements made by Planck.
(c) looks good until you look closely. A photon can only transfer all or none of its energy, not part of it.
(d) is indeed what Einstein said.
This is on the formula sheet and you need to know what they all relate to.
They remained best buddies Einstein was a pacifist Planck opposed Hitler They sorted out their differences by challenging each other on the TV show 'Germany's Brainiest Scientist.' Einstein was indeed a pacifist.
They remained best buddies Einstein was a pacifist Planck opposed Hitler They sorted out their differences by challenging each other on the TV show 'Germany's Brainiest Scientist.'
Einstein was indeed a pacifist.
When heated they conduct by having electrons flow through the conduction band and negative holes flow through the valance band They act as an insulator at absolute zero. When heated they conduct electricity through both the conduction band and holes in the valance band Resistance decreases with increased temperature (b) is wrong because they do indeed act as insulators at absolute zero. (c) is wrong because they do conduct electricity in both bands. (d) is wrong because resistance does decrease with increased temperature. (a) is the correct answer. It is almost a true statement except that the holes in the valance band are positive holes, not negative.
When heated they conduct by having electrons flow through the conduction band and negative holes flow through the valance band They act as an insulator at absolute zero. When heated they conduct electricity through both the conduction band and holes in the valance band Resistance decreases with increased temperature
(b) is wrong because they do indeed act as insulators at absolute zero.
(c) is wrong because they do conduct electricity in both bands.
(d) is wrong because resistance does decrease with increased temperature.
(a) is the correct answer. It is almost a true statement except that the holes in the valance band are positive holes, not negative.
Copper Silicon Aluminium Germanium Just need to know this. Silicon replaced germanium.
Copper Silicon Aluminium Germanium
Just need to know this. Silicon replaced germanium.
Broken semiconductor N-type semiconductor P-type semiconductor Superconductor
Transformer Valve Fan Heater None of the above
X-Rays cause cancer Metals were latticed Diamond's structure Periodic atomic structure of crystals The Braggs did show the periodic atomic structure of crystals.
X-Rays cause cancer Metals were latticed Diamond's structure Periodic atomic structure of crystals
The Braggs did show the periodic atomic structure of crystals.
Ceramics Pure metals Alloys Metal oxides Pure metals only have type 1 superconductors.
Ceramics Pure metals Alloys Metal oxides
Pure metals only have type 1 superconductors.
Critical temperature Superconductivity temperature Activity point Critical point Need to know this.
Critical temperature Superconductivity temperature Activity point Critical point
Need to know this.
They can't be used with AC Even the highest temperature superconductors are still too low to be practical They are all brittle Liquid nitrogen is not cold enough to be used on type 1 superconductors (a) is true, superconductors can't be used with AC. (b) is true because the highest critical temperature for a superconductor so far is 138oK. (d) is true because liquid nitrogen is not cold enough to reach the critical temps of type 1 conductors. (c) is the answer because not all superconductors are brittle, only type 2.
They can't be used with AC Even the highest temperature superconductors are still too low to be practical They are all brittle Liquid nitrogen is not cold enough to be used on type 1 superconductors
(a) is true, superconductors can't be used with AC.
(b) is true because the highest critical temperature for a superconductor so far is 138oK.
(d) is true because liquid nitrogen is not cold enough to reach the critical temps of type 1 conductors.
(c) is the answer because not all superconductors are brittle, only type 2.
Superconductivity Magnetic Levitation The Meissner Effect Magic Just need to know it.
Superconductivity Magnetic Levitation The Meissner Effect Magic
Just need to know it.
Superconductive Quantum Inference Devices Superconductive Quantum Universal Information Devices Superpowered Qualls Under Impending Doom A squid is a fish Again, just need to know this.
Superconductive Quantum Inference Devices Superconductive Quantum Universal Information Devices Superpowered Qualls Under Impending Doom A squid is a fish
Again, just need to know this.
Electricity Transmission Electricity Generation Computing Motors and Generators Josephson junctions allow for superfast electrical switches in computing.
Electricity Transmission Electricity Generation Computing Motors and Generators
Josephson junctions allow for superfast electrical switches in computing.
MRIs Magnetometers Quantum Computers All of the above They all use superconductors
MRIs Magnetometers Quantum Computers All of the above
They all use superconductors
YBCO Lead Thallium-Barium-Calcium Copper Oxide None of the above Just need to know this.
YBCO Lead Thallium-Barium-Calcium Copper Oxide None of the above
Just need to know this.
