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Physics chap 4 > P2 - Current Electricity > Flashcards

P2 - Current Electricity Flashcards

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1
Q

What is transferred when objects become charged?

A

Electrons.

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2
Q

What do like and unlike charges do?

A

Like charges repel; unlike charges attract.

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3
Q

What is a charged atom known as?

A

An ion

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4
Q

What affect does removing an electron from an atom have?

A

The atom becomes positively charged.

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5
Q

What determines the size of an electric current?

A

The rate of flow of charge.

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6
Q

How is an ammeter connected to a circuit?

A

In series with the component giving the current through it.

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7
Q

How is a voltmeter connected to a circuit!

A

Parallel to the component giving the pd across it.

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8
Q

What is an ohmic conductor?

A

A conductor that obeys Ohm’s Law, the voltage across a conductor is directly proportional to the current flowing through it

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9
Q

What happens to the resistance of a filament bulb as the temperature increases?

A

The resistance increases with the temeprature. ∴ non-ohmic

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10
Q

What happens when two insulating materials are rubbed together?

A

Some materials become charged.

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11
Q

How does the resistance of a thermistor change with temperature.

A

Resistance decreases when the temperature increases.

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12
Q

How does the current vary through a series circuit?

A

The same current passes through components in series.

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13
Q

How does the pd of the voltage supply vary through a series circuit?

A

it is shared between components.

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14
Q

the total pd is the sum of what when more than one cell is used in series?

A

The total pd is the sum of the pd of each cell.

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15
Q

What is the pd across the components in a parallel circuit?

A

equal across each component

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16
Q

What is the relationship between resistance and current in a parallel circuit?

A

The bigger the resistance, the smaller the current.

17
Q

What is the symbol for a cell on a circuit diagram?

A
18
Q

What is the symbol for a resistor on a circuit diagram?

A
19
Q

What is the symbol for a switch on a circuit diagram?

A
20
Q

What is the symbol for a variable resistor on a circuit diagram?

A
21
Q

What is the symbol for a bulb on a circuit diagram?

A
22
Q

What is the symbol for a fuse on a circuit diagram?

A
23
Q

What is the symbol for a diode on a circuit diagram?

A
24
Q

What is the symbol for an LED on a circuit diagram?

A
25
Q

What is the symbol for a voltmeter on a circuit diagram?

A
26
Q

What is the symbol for an ammeter on a circuit diagram?

A

Physics chap 4 (6 decks)

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