Physics Flashcards

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1
Q

What is a neutral object?

A

Object that has equal proton and electron

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2
Q

What is positive and negative

A

When there is an inablance

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3
Q

What is a charged object

A

When objec texert an electric force (pulling or repulsing

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4
Q

Do two neutral object exter a force on each other

A

No

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5
Q

What happens when a charged object is near a neutral

A

Electrons in neutral will induce towards it and the opposite for negative

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6
Q

What are three methods of charging

A

Friction. Conduction. Induction

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7
Q

What is charging by friction

A

Two different neutral materials are rubbed together or come in contact and electric charges are transferred

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8
Q

What is the electrostatic series

A

A list of materials in increasing tendency to gain electrons

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9
Q

What is conduction

A

When two objects have different amounts of electron charge and come in contact.

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10
Q

What is grounding

A

Objects with excess charge ( positive or negative) can have the aforementioned excess charge removed by placing the object to the ground.

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11
Q

What is difference between good conductor and fair

A

Both can conduct but good is better

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12
Q

What is insulation

A

It prevents heat and electricity from entering. This happens because the electrons are tightly bound to atoms make up the materials. Include non-metals

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13
Q

What is induction charging

A

When a charged object is brought near a neutral object it induces electrons in the object to divide in half.

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14
Q

What is the way to make induction charging permanent

A

If you divide electrons then ground opposite charged half then it will be permanency charged

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15
Q

What is lighting

A

Electric discharge in clouds. Separation of charges like induction.

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16
Q

What charge is lightning

A

Both

17
Q

What is current

A

Flow of electrons in circuit. Flow of coulomb In a circuit a second

18
Q

What is symbol and unit for current

A

Symbol : I. Unit Ampereres(A

19
Q

What is potential difference

A

Difference in energy per coulomb between two points.

20
Q

Symbol and unit for potential difference

A

Volt V

21
Q

What are the negative and positive areas in circuit

A

Negative (Anode) and positive (Cathode)

22
Q

What is resistance

A

How difficult it is electrons to move through a conductor

23
Q

Symbol and unit for resistance

A

Symbol R. Unit (omega symbol)

24
Q

What are wires and what are they made of

A

Wires transport electricity and are made of a conductor and surrounded by insulator

25
Q

What impacts wire efficiency

A

Wider is good. More distance bad

26
Q

What is a short circuit

A

Circuit shocks itself

27
Q

What are series rules

A

Current is same everywhere if one load has lower resistance.

28
Q

What will happen when parallel circuits branched pathway come together

A

Currents add up. Voltage same

29
Q

What is percent efficiency

A

Measure of how well a device is converting energy. Whenever a load converts electrical energy jnyo other forms it is lost as heat

30
Q

What is cost of energy

A

Energy cost = price rate x power x time.

31
Q

What is power

A

How many joules a second

32
Q

Unit for power

A

Symbol P and unit Watts

33
Q

What is kWh

A

How many kilowatts used an hour