electricity and magnetism

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8 Terms

1
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Ohm's Law? (How to work out Voltage)

V = I x R (Voltage = Current x Resistance)

2
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Power?

P = I x V (Power = Current x Voltage)

3
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Charge?

Q = I x t (Charge = Current x Time)

4
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Series resistors?

R(total) = R1 + R2 (Just add them up)

5
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What does a hot thermistor or bright LDR mean?

Low resistance

6
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What is the current and voltage in a series circuit?

  • Current is the same everywhere.

  • Voltage splits across components.


7
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What is the current and voltage in a parallel circuit?

  • Voltage is the same across every branch.

  • Current splits across branches.


8
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Right-Hand Grip Rule (For Electromagnets):


  • Thumb points in the direction of conventional current your fingers curl in the direction of the magnetic field loops.