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Labs > Current, Voltage And Resistance > Flashcards

Current, Voltage And Resistance Flashcards

0
Q

What is the unit of measurement of charge and it’s symbol?

A

Coulomb; C

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1
Q

What is the symbol for electrical charge?

A

Q

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2
Q

What is the number of electrons for one unit of charge?

A

6.28 x 10^18

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3
Q

Describe static electricity

A

The buildup of charging an isolated object

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4
Q

Define electric current

A

The flow of charge

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5
Q

What is the symbol for electric current

A

I

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6
Q

What is the unit of measurement for electric current and at symbol?

A

Ampere; A

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7
Q

Describe conventional current flow?

A

Current flow from positive to negative

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8
Q

Define voltage

A

The potential energy difference between two points

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9
Q

What is the name of force that maintains a voltage?

A

Electromotive force

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10
Q

State an abbreviation for electromotive force.

A

emf

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11
Q

State the unit of measurement for voltage and it’s symbol

A

Volt; V

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12
Q

State the symbol used to represent source voltage

A

E

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13
Q

State the symbol used to represent voltage drop

A

V

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14
Q

List six methods of producing an electromotive force

A
  1. Magnetic
  2. Chemical
  3. Friction
  4. Heat
  5. Pressure
  6. Light
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15
Q

Define resistance

A

Resistance is the property of the material that opposes the flow of an electric current

16
Q

Using Ohm’s law, what happens to current when the voltage is increased and the resistance is held constant

A

The current increases

17
Q

Using Ohm’s law, what happens to current when the resistance is increased and the voltage is held constant

A

The current decreases

18
Q

The flow of electrons from one point to another is caused by

A

A difference in charge between two points

19
Q

An electric field is a force that exists between _____ charges

A

Different; opposite

20
Q

When a potential difference exists across an open portion of a circuit, a

A

Current will not flow

21
Q

The unit of measurement for an electric current is

A

Ampere

22
Q

According to a fundamental law of electricity the current in a DC circuit is

A

Directly proportional to the voltage

23
Q

The symbol used to represent resistance is

A

R

24
Q

The circuit property that opposes a flow of current within a circuit is called

A

Resistance

25
Q

The symbol used to represent the unit of measurement for potential difference across a resistive load is

A

V

26
Q

The type of electricity produced by rubbing together to materials is called

A

Static

27
Q

A generator is a device that uses the magnetic principle to produce electricity.
True or false

A

True

28
Q

A coulomb is the measure of a certain number of

A

Electrons

29
Q

A device that has the ability to maintain a difference in potential between two points of an electric circuit is said to develop a/an:

A

Electromotive force

Labs (4 decks)

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