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IE255 (Basic EE) > Lesson 4: Battery > Flashcards

Lesson 4: Battery Flashcards

1
Q

This converts chemical energy to electrical energy where if ther is no conversion of energy, there is no electrical load.

A

Battery

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2
Q

E stands for?

A

Electromotive force

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3
Q

r stands for?

A

Internal resistance

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4
Q

What is the electromotive force (E) of the circuit if there is no load condition?

A

It is equal to the terminatal voltage.

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5
Q

Battery can be both?

A

A source and a load

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6
Q

Battery as a source means that?

A

The battery is discharging

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7
Q

Recharging battery means that?

A

The battery acts as a load

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8
Q

What is the amount of work needed to move a unit charge from a reference point to a specific point against an electric field?

A

Potential Difference

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9
Q

In a Discharging Battery, how do we correct the sign convention of the assumed current direction?

A

Negate the answer as negating means opposing the direction of the potential difference

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10
Q

In a Discharging Battery, where is the direction of the current coming from?

A

From the EMF going to the load

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11
Q

In a Recharging Battery, where is the direction of the current coming from?

A

From the source going to the EMF

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12
Q

This is the miniature battery where it fills up the battery.

A

Cells

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13
Q

What do cells in series do?

A

Supply a load of higher voltage rating

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14
Q

How to solve for the total EMF with the same direction?

A

Add all individual emf

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15
Q

How to solve for the total EMF with one cell in a different direction?

A

Subtract it to other emf

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16
Q

Is adding all the individual internal resistances (r) will determine the total internal resistance?

A

Yes

17
Q

What do cells in parallel do?

A

They connect in order to yield a higher current

18
Q

How many cases whould we familarize with in solving for the cells in parallel?

A

3 cases

19
Q

The first case of cells in parallel states that there should be the same E and same r. What will be the total E and r should be?

A

The total of E (or EMF) is equal to the given E and the total r is equal to r/(the number of internal resistances)

20
Q

The second case of cells in parallel states that there are the same E but different r. What will be the total E and r should be?

A

The total of E (or EMF) is equal to the given E while the total r is equal to 1/(the sum of the reciprocal of internal resistances)

21
Q

The third case of cells in parallel states that there are the different E and different r. What will be the total E and r should be?

A

balikan later

22
Q

What is the rate per unit time at which electrical energy is transferred by an electric circuit?

A

Electric Power

23
Q

It is the rate of doing work

A

Power

24
Q

It is the time rate or absorbing energy

A

Power

25
Q

It is the energy carried by moving electrons in an electric conductor

A

Electrical Energy

IE255 (Basic EE) (5 decks)

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