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Science Term 4 > Basic Ohm's Law 002 > Flashcards

Basic Ohm's Law 002 Flashcards

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1
Q

What is voltage?

A

the charge (electron) “pusher.” Voltage causes current to flow/move.

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2
Q

List sources of voltage

A

Battery
Generator
Outlets

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3
Q

What is the symbol for voltage?

A

V

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4
Q

What is the unit for voltage?

A

Unit for voltage = Volts (V)

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5
Q

Who was Alessandro Volta

A

Italian physicist
known especially for the invention of the electrochemical cell, aka the battery in 1800.
1745-1827

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6
Q

What is current?

A

flow of charge (electrons) within a conductor or how fast charge is moving.

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7
Q

What is the symbol for current?

A

Symbol for Current = I

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8
Q

What is the unit for current?

A

Unit for Current = Amps (I)

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9
Q

Who was André Ampère?

A

French physicist and mathematician.
One of the main discoverers of electromagnetism.
SI unit of measurement of electric current, the ampere, is named after him.
1775-1836

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10
Q

Current’s effect on a person: 0.001 Amps

A

Can be felt

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11
Q

Current’s effect on a person: 0.005 Amps

A

Painful

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12
Q

Current’s effect on a person: 0.010 Amps

A

Involuntary muscle spasms

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13
Q

Current’s effect on a person: 0.015 Amps

A

Loss of muscle control

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14
Q

Current’s effect on a person: 0.070 Amps

A

If through heart, serious injury, likely fatal if it lasts more than 1 second.

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15
Q

What is resistance?

A

Resistance: opposes the push from the voltage source. Resistance affects the speed of the current.

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16
Q

What is the symbol for resistance?

A

Symbol for Resistance = Ω

17
Q

What is the unit for Resistance?

A

Unit for Resistance = Ohms (Ώ)

18
Q

Who was Georg Ohm

A

German Physicist
Ohm determined that there is a direct porportionality between th voltage applied across a conductor and the electric current
this relationsip is known as Ohm’s law
1789-1854

19
Q

What happens if the voltage in a circuit increases?

A

The current will increase

20
Q

What happens if the voltage in a circuit decreases?

A

The current will decrease
*this is a direct/proportional relationship

21
Q

What happens if the resistance in a circuit increases

A

the current will decrease

22
Q

What happens if the resistance in a circuit decreases?

A

The current will increase
*this is an inversely proportional relationship

23
Q

What is Ohm’s law?

A

Voltage is equal to the current multiplied by the resistance.

24
Q

What is the mathamatical equal for Ohm’s Law?

A

V=IR

25
Q

Whats the equation if you want to find resistance?

A

R=V/I

26
Q

What is the equation if you want to find Amps?

A

I=V/R

Science Term 4 (7 decks)

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