Ohmic, non-ohmic resistance recap

Identify this symbol.

• Resistor

• Fuse

Identify this symbol.

• Ammeter

• Voltmeter

• Resistor

This symbol represents a ..........

• bulb

• wire

• cell

• resistor

A student uses a length of wire as a resistor. He makes a second resistor from the same material.

To be certain of making a second resistor of higher resistance, he should use a piece of wire that is:

• longer and thicker.

• longer and thinner.

• shorter and thicker.

• shorter and thinner.

Identify this symbol.

• Switch

• buzzer

• Bulb

• Light Dependent Resistor (LDR)

The table describes four different resistance wires.

They are all made from the same metal.

Which wire has the smallest resistance?

• A

• B

• C

• D

These four cylinders are connected one at a time in series with a bulb.

Which option describes the brightness of the bulb best?

• Bulb is brightest with W

  Bulb is dimmest with Y

• Bulb is brightest with W

  Bulb is dimmest with Z

• Bulb is brightest with X

  Bulb is dimmest with Y

• Bulb is brightest with X

  Bulb is dimmest with Y

Which symbols are used for the units of current and of resistance?

• A

• B

• C

• D

Which equation shows a correct relationship between variables?

• V = I / R

• I = V x R

• R = V x I

• V = I x R

The diagrams show four current-voltage graphs.

Which two graphs show the characteristics of an ohmic resistor and of a filament lamp?

• ohmic resistor : W

  filament lamp : Y

• ohmic resistor : X

  filament lamp : Y

• ohmic resistor : W

  filament lamp : Z

• ohmic resistor : X

  filament lamp : Z