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Theory > Unit 2 > Flashcards

Unit 2 Flashcards

1
Q

What are battery cells constructed of?

A

They are constructed from many different combinations of dissimilar metals, an-acid, alkaline or salt solution

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2
Q

What is an Electrolyte?

A

A substance that conducts electric current because of its ability to breakdown under certain conditions in positive and negative ions

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3
Q

What is an ion?

A

An atom or group of atoms that have a positive or negative charge

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4
Q

What are ions referred to as?

A

A charged particle

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5
Q

What determines the quantity of voltage that can be developed?

A

The construction material

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6
Q

What are the two types of cells?

A

Primary and Secondary

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7
Q

What cell can be recharged and which can not?

A

Primary can not be recharged and secondary can be recharged

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8
Q

What is the amount of current that a cell can produce determined by?

A

The size of the plates

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9
Q

What does OHMs law state?

A

The current through a conductor between two points is directly proportional to the potential differences or voltage across two points, and inversely proportional between them.

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10
Q

Series circuit

A
  1. There is one path for current to flow
  2. Current is the same throughout a series circuit
  3. Voltage will drop/ split direct proportion to resistance
  4. The sum of the voltage drops in a series circuit will equal the square voltage
  5. Total circuit resistance is found by directly adding resistance values
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11
Q

Parallel Circuits

A
  1. There are multiple paths for current to flow
  2. Voltage is constant across each branch of a parallel circuit
  3. Current splits in inverse proportion to resistance
  4. The sum of the branch currents will equal the total current
  5. Total resistance is found by Product/sum or reciprocal method
  6. Total resistance will be less than the smallest branch resistance
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12
Q

Kirchoffs Current Law

A
  1. The Algebraic sum of the current entering and leaving a point in a circuit must equal zero
  2. The algebraic sum of the voltage sources and the voltage drops in a closed circuit must equal zero
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13
Q

What is the cause of less resistance in a parallel circuit?

A

More Current and more branches

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14
Q

What is energy defined as?

A

The ability to do work

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15
Q

What can the conversion of electrical energy to perform result in?

A

Mechanical Movement
Heat
Light
sound

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16
Q

What is work?

A

The quantity of energy transferred from one system to another

17
Q

Mechanical Work

A

The amount of energy transferred by a force

18
Q

How many Ft-lbs/sec equal 1 horse power

A

550

19
Q

How many watts does 1 horse power equal?

A

746 watts

20
Q

How many Btu/Hr equal one watt?

A

3.42 Btu/hr

21
Q

1 calorie/ sec equal how many watts?

A

4.19

22
Q

1 watt equals how many ft lb/ sec?

A

738

23
Q

What are the power formulas?

A

P= IxE
P= (Isq)(R)
P= Esq/ R

Theory (3 decks)

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