Current and Charge (Random questions)

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What is the unit of charge?
Coulomb
1 of 21
In a fluid or liquid, the charge carriers are...
positive and negative ions
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What do you apply to insulators to add or removes charges?
Friction
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What is the definition of current?
Current is the rate of flow of charge
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Current of 1A is equal to...
1C passing a single point in 1s
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What is the equation for charge?
Charge = Current x Time (Q = I x t)
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Which way do the electrons flow in conventional current?
Positive to Negative
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How do electrons move? (Not in conventional current)
Negative to Positive
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What is the definition of potential difference?
Potential difference is the work done per unit of charge
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What is the equation for potential difference?
Potential difference = work done / charge (p.d. = wd / charge)
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What is the definition of E.M.F? (Electro Motive Force)
The electrical energy produce per unit charge passing a source
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What is the equation for E.M.F?
Work done = Charge x E.M.F
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What is the equation for power?
Power = Work done / Time (P = wd / t)
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What is the equation for power in regards to E.M.F?
Power = Current x Voltage (P = I x V)
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What is the charge of an electron?
1.6 x 10^-19
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What is the length of one micrometre?
1 x 10^-6
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What is the equation for resistance?
Resistance = Voltage / Current (R = V / I)
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What are the units of resistance?
Ohms
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What is the equation for resistance in a wire?
Resistance = Resistivty x length / The wire's cross-sectional area (R = pl / A)
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Free electrons are only found in...
metals
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What are the units of current?
Amperes
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Card 2

Front

In a fluid or liquid, the charge carriers are...

Back

positive and negative ions

Card 3

Front

What do you apply to insulators to add or removes charges?

Back

Preview of the front of card 3

Card 4

Front

What is the definition of current?

Back

Preview of the front of card 4

Card 5

Front

Current of 1A is equal to...

Back

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