Module 3 resistors

Resistance is defined as

• The opposition offered by a material to the free flow of electrons

• The assistance offered by a material to the free flow of electrons

• A material’s properties to aide to the free flow of electrons

Factors that affect resistance are length, cross sectional area, material and

If the length of a wire is doubled in length the resistance changes by

• X4

• X2

• X3

• No change

The resistance of a metallic conductor is BLANK proportional to its cross-sectional area

• Inversely

• Directly

What resistor band colour is number 4?

• Red

• Yellow

• Blue

• Orange

On a 4 band resistor the 3rd band represents

• The 2nd digit

• The multiplier

• Number of zeros

• Tolerance

The tolerance band on a resistor is red what percentage does this represent?

• 1%

• 2%

• 5%

• 10%

A resistor is marked 1K5 what does this mean?

• 1500 ohm resistance

• 1.5 ohm resistance

• 15000 ohm resistance

• 15 kohm resistance

In a resistor electrical energy is converted into

• Heat

• Light

• Kinetic

• Potential

If two 4-Ω resistors are wired in parallel, then the total resistance is

• Rt=4/2

• Rt=2/4

• 1/rt=1/4+1/4