Current Charge Voltage Energy

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  • Created by: Rob Smith
  • Created on: 17-01-14 13:33
A current of 2.5A flows for 30s. How much charge passes?
75C
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A current of 8 mA flows for 12s. How much charge passes?
96mC or 9.6 x10-2 C
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A current of 4A flows for 2 ns. How much charge passes?
8 nC or 8 x10-9 C
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What is the charge on 1 electron?
1.6 x10-19 C
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How many amps is 350 microamps?
350 x10-6 A or 3.5 x10-4 A
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The amount of charge flowing each second is the...
Current
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Current in the rate of flow of ...
Charge
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A charge of 10C flows through a lamp in 4s. What is the current?
2.5A
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A charge of 10mC flows through a wire in 4s. What is the current?
2.5mA or 2.5 x10-3A
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A charge of 100 mircocoulombs flows through a diode in 5 ms. What is the current?
2 x10-2A or 20mA
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How long does it take 5C of charge to flow thorugh a wire when the current is 10A?
0.5s
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How long does it take 4kC of charge to flow thorugh a wire when the current is 10A?
400s
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How long does it take 6.5 mC of charge to flow thorugh a wire when the current is 0.05 amps?
0.13s
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A current of 1 A means...
1 C of charge flows each second
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A p.d. of 1V means...
1C of charge carries 1J of energy
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Define a voltage.
Voltage is the energy each coulomb of charge carries
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How many electrons flow each second in a current of 1mA?
6.25 x10^15 electrons
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How many electrons flow in 10 seconds in a current of 2.5A?
1.57 x10^20 electrons
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A cell of 2.5V releases 3C of charge. How much energy is transferred?
7.5J
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A cell of 9V releases 60 mC of charge. How much energy is transferred?
0.54J
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The greater the p.d. of a cell the...
more energy each coulomb of charge transfers
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A charge of 0.5C passes through a bulb transferring 1.5J as it does. What if the p.d. on the bulb?
3V
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A charge of 4.2C passes through a heater transferring 1 kJ as it does. What if the p.d. on the bulb?
238V
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A connector in a CPUpasses a charge of 1nC transferring 12pJ as it does. What p.d. is set up in the CPU?
0.012V
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The greater the current the...
more charge flows each second
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A cell with a p.d. of 9V means...
each coulomb of charge carries 9J of energy
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Other cards in this set

Card 2

Front

A current of 8 mA flows for 12s. How much charge passes?

Back

96mC or 9.6 x10-2 C

Card 3

Front

A current of 4A flows for 2 ns. How much charge passes?

Back

Preview of the front of card 3

Card 4

Front

What is the charge on 1 electron?

Back

Preview of the front of card 4

Card 5

Front

How many amps is 350 microamps?

Back

Preview of the front of card 5
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