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SPH3U > Unit 5 - Electricity > Flashcards

Unit 5 - Electricity Flashcards

1
Q

What is Electricity?

A

the movement of charge

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2
Q

What’s the difference between Power and Electrical Power?

A

Power is the rate at which energy is transformed (consumed)

Electrical Power is the rate at which electrical energy is transformed (consumed)

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3
Q

What is a Brownout?

A

when employees temporarily shut down the electrical supply of energy of a neighbourhood

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4
Q

How many Joules are in 1 kWh?

A

3.6x10^6 Joules

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5
Q

What is our current standing in Electrical Energy Efficiency?

A

current ways of generating power are inefficient and the majority non-renewable ( transforming radiant, chemical and kinetic energy) Waste energy is in the form of thermal energy.

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6
Q

What is Electrical Potential?

A

the amount of potential energy in electrons and the number of electrons. Thus, it tells us the amount of charge in the circuit.

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7
Q

What is a Voltmeter?

A

Measures the electrical potential difference. Must be connected in parallel because Vseries = V1 = V2

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8
Q

How many electrons are in a Columb?

A

6.2x10^18 electrons

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9
Q

What’s the difference between Voltage Gain and Voltage Drop

?

A

Voltage Gain is an increase in electric potential energy (battery)

Voltage Drop is a decrease in electric potential energy (lightbulb)

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10
Q

How is Electric Potential created?

A

It is kinetic energy that is stored as potential energy in the electron. This potential energy then causes the electron to move where there is less potential energy.

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11
Q

What is Direct Current?

A

the direct flow of electrons in a single direction from the negative terminal to the positive terminal.

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12
Q

What is Conventional Current?

A

In the past, scientists thought charge came from protons. Therefore the conventional current goes from the positive to the negative.

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13
Q

What is an Ammeter?

A

used to measure the electrical current at a specific spot. Must be connected in series because Iseries = I1 = I2

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14
Q

What is an Ohmmeter?

A

used to measure the electrical resistance, must be connected in parallel and when the circuit is off

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15
Q

What is Electrical Resistivity?

A

how strongly a material will oppose the flow of electric current (conductors have low electrical resistivity)

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16
Q

What is Ohm’s Law?

A

the potential difference and current, of a circuit is proportional.

17
Q

What is Kirchhoff’s Voltage Law?

A

shows the sum of any decrease and increase in electric potential energy is equal to zero.

18
Q

What is Kirchhoff’s Current Law?

A

shows the amount of current flowing into a junction is the same flowing out.

19
Q

What is Equivalent Resistance?

A

the total amount of resistance in a group of resistors in a circuiit.

SPH3U (2 decks)

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