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Physical Science > Electric Circuit > Flashcards

Electric Circuit Flashcards

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1
Q

What is current

A

The rate of flow of charge

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2
Q

What is potential difference

A

Work done per unit positive charge

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3
Q

What is resistance

A

A materials opposition to the flow of electrical charge

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4
Q

What is ampere

A

The unit of electric current equal to a flow of one coulomb per second

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5
Q

What is EMF

A

The total energy supplied per coulomb of charge by the cell

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6
Q

What does a simple circuit contain a minimum of

A

A source (cell or battery), conducting material, and an appliance

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7
Q

What is the use of a cell or battery

A

To provide energy for charges to move

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8
Q

What is the use of a switch

A

Closes or opens a circuit

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9
Q

What is the use of a conductor

A

Connects the circuit elements

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10
Q

What is the use of a bulb

A

Glows when a current goes through it

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11
Q

What is the use of a voltmeter

A

It measures the potential difference

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12
Q

What is the use of an ammeter

A

If measure the current in a circuit

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13
Q

What is the direction of a current

A

Conventional current which is from positive to negative

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14
Q

What is a series circuit connection.

A

Components connected in a circuit in such a way there is only one path for current to flow

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15
Q

What is a parellel connection

A

Components are connected in parallel if there is more than one pathway for current to flow

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16
Q

What is ohms law

A

Current through a conductor is directly proportional to the potential difference across the conductor at constant temperature

17
Q

What are the ways to calculate voltage

A

V=IR V=w/Q

18
Q

What are the ways to calculate current

A

I=q/t V=IR

19
Q

What factors influence resistance

A

Length, temperature, type of conductor and thickness

20
Q

What is needed for a fair investigation

A

Only one factor needs to be changing in order for an investigation to be fair

21
Q

How does potential difference affect current

A

Potential difference is directly proportional to current

22
Q

How does potential difference affect resistance

A

Potential difference is directly proportional to resistance

23
Q

What is power

A

The rate at which energy is converted into other forms of energy

24
Q

What is electrical power

A

The rate at which electrical energy is converted into other forms of energy in an electric circuit

25
Q

What is one watt

A

The power when one joule of energy is transferred in one second

26
Q

What are the equations we can use to calculate power

A

P = E/△t
P = VI
P = RI^2
P = V^2/R

27
Q

How to get from kWh to Joules

A

Multiply by 3,6 x 10^6

28
Q

How do you calculate the cost of electricity

A

Cost = amount electricity(kWh) x price (R)

29
Q

How do we calculate the month cost of electricity

A

Monthly cost = daily cost x number of days in that month

Physical Science (29 decks)

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