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L Theory > Resitance > Flashcards

Resitance Flashcards

1
Q

A material having many free electrons will pass current freely

These materials are called …

A

Conductors

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2
Q

A material having few free electrons will only pass current with great difficulty

These materials are called …

A

Insulators

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3
Q

Insulators and conductors offer opposition to current flow

This opposition is called …

A

Resistance

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4
Q

The basic measurement of resistance is the …

A

OHM

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5
Q

List 6 insulators

A

Wood, paper, rubber, plastic, glass, woven fabrics

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6
Q

List 6 conductors

A

Copper, Brass, silver, Carbon, gold, mercury

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7
Q

Good conductors are materials with many … …

A

Free electrons

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8
Q

Some materials are better conductors because they have more … … than other materials

A

Free electrons

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9
Q

Resistance is directly proportional to the length of the …

A

Conductor

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10
Q

The smaller (thinner) the conductor the greater the resistance will be opposing the … …

A

Current flow

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11
Q

The larger (thicker) the conductor the less … will be opposing current flow

A

Resistance

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12
Q

In most materials the … they become the higher the resistance becomes

A

Hotter

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13
Q

The … the material becomes the lower the resistance

A

Cooler

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14
Q

State OHM’s Law

A

Ohms law states that a current flowing through a conductor is directly proportional to the applied voltage across it, providing the temperature remains constant, and is inversely proportional to the resistance.

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15
Q

Draw OHM’s law triangle

A

V over I + R

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16
Q

What is the equation to find voltage?

A

I x R

17
Q

What is the equation to find the resistance

A

V divided by I

18
Q

To find the current what is the equation?

A

V divided by R

19
Q

All components in electrical circuits contain …

A

Resistance

20
Q

What 3 ways can components be connected?

A

Series
Parallel
Series-parallel

21
Q

In a series circuit, the current remains constant and the … changes

A

Voltage

22
Q

When an EMF moves electrons through a … some of the EMF is used up

A

Resistance

23
Q

This loss of EMF is called a … … across that resistance

A

Voltage drop

24
Q

In a parallel circuit, the voltage remains … and the … changes

A

Constant
Current

L Theory (10 decks)

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