Electrical Theory Module 3 - L Flashcards

1
Q

Potential difference will exist between two points in a circuit that have a??

A

Difference in charge

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2
Q

What is potential difference measured in??

A

Volts (V)

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3
Q

Name 6 methods by which voltage can be produced.

A
Heat
Light
Induction
Pressure
Chemical 
Friction
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4
Q

To produce a voltage chemically, the two metal plates need to be made of?

A

Dissimilar metals

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5
Q

What’s an example of where voltage is produced by friction??

A

Sticking a balloon to wall

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6
Q

What is the name given to the materials in a solar panel?

A

Semiconductors

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7
Q

What holds the electron in orbit around the nucleus?

A

A force of attraction

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8
Q

What is the outer orbit of the atom called?

A

The valance shell

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9
Q

What is the electron in the outer orbit called?

A

The valance electron

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10
Q

What is the polarity of an electron

A

Negative

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11
Q

If an electron is removed from an atom, by an external force, the electron is now known as a??

A

Free electron

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12
Q

If an electron is removed, by an external force, the atom is now known as a??

A

Positive ion

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13
Q

The direction of electron flow is always?

A

Negative to positive

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14
Q

If current were to flow from positive (+ve) to negative -ve, it would be called??

A

Conventional flow

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15
Q

What is the circuit symbol for current?

A

I

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16
Q

What is the unit of measurement of current?

A

Amps (A)

17
Q

What is ohm’s law?

A

Ohms law states the current flowing in a circuit is directly proportional to the applied potential difference and inversely proportional to the resistance in the circuit.

18
Q

Ohms law triangle equations

A

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

Current (I) = voltage (V) divided by resistance (R)

Resistance (R) = voltage (V) divided by current (I)

19
Q

Select all the requirements needed to produce a voltage by induction

A

Relative movement, a magnetic field and an electrical conductor.