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20 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What is static electricity? |
Caused by an electrical charge (electrostatic charge) building up on insulating materials. |
Build up of E____________ c_____. |
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Relative charge and mass of a proton, neutron and electron. |
Proton: Charge = +1 Mass = 1 Neutron: Charge = 0 Mass = 1 Electron: Charge = -1 Mass = negligible
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Pro = positive Neut = neutral Elec = negative |
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What is charging by induction? |
Charging a neutral object using a charged object by transferring electrons. |
Transfer e________. |
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What kind of materials can be given a charge? |
Insulating material such as: Humans Plastic Wood |
H_____ P______ W___ |
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What is earthing? |
Electrons flow into the earth from an object through another. E.g Charge from a person can flow through a metal door to the ground. |
E________ flow into the E____. |
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How is lightning produced? |
Static electricity builds up on clouds and a huge spark can form between the cloud and the ground. The lightning is caused by charged particles flowing through the atmosphere. |
Build up of S____ E_____ on clouds. |
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How do you prevent an aircraft from blowing up when being refuelled? |
A bonding line is used to connect the aircraft to the earth before being refuelled, so the aircraft will be discharged and there will be no sparks. |
B______ L___ prevents sparks. |
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How do you prevent an aircraft from blowing up when being refuelled? |
A bonding line is used to connect the aircraft to the earth before being refuelled, so the aircraft will be discharged and there will be no sparks. |
B______ L___ prevents sparks. |
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How do you prevent tankers from exploding when delivering fuel? |
The hose used to fill the underground fuel tanks are made from a conducting material to prevent sparks. |
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How do you prevent an aircraft from blowing up when being refuelled? |
A bonding line is used to connect the aircraft to the earth before being refuelled, so the aircraft will be discharged and there will be no sparks. |
B______ L___ prevents sparks. |
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Current (A) = |
Charge (C) / Time (S) |
C / S |
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How do you prevent tankers from exploding when delivering fuel? |
The hose used to fill the underground fuel tanks are made from a conducting material to prevent sparks. |
C_______ material prevents S_____. |
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How does electrostatic paint work? |
The spray nozzle is metal and connected to the positive terminal of an electricity supply, the the paint picks up a positive charge as it leaves the nozzle. The positively charged droplets repel each other and form a thin layer of paint. The object being painted must be given a negative charge so the paint droplets are attracted to it's surface. |
Nozzle P______ charges paint droplets. |
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Why can insulating materials be given a charge but conducting materials can not? |
Any charge transferred to a conducting material is conducted away, whereas insulating materials do not conduct the charge away. |
Charge isn't C________ A____ in I_______ materials. |
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What type of current do cells and batteries supply? |
Direct current - it can only go in one direction. |
D/C |
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What type of current is produced by a generator? |
Alternating current - the electrons can change direction many times each second. |
A/C |
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Define current. |
The rate of flow of charged particles. |
F___ of C_______ P_______. |
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What is the unit of charge? |
The unit for charge is Coulombs (C). |
C |
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What is the unit for current? |
The unit for current is amperes/amps (A) |
A |
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The size of current depends on... |
How much charge is passing a point in a circuit each second. |
The amount of C____ passing a point per S_______. |
