Basic Electricity Midterm

The movement (or flow) of electrons forms an ________.

• Electric current

• Magnetic field

• Gravitational force

• Nuclear reaction

An atom's charge can be changed when it gains or loses ________.

• Electrons

• Protons

• Neutrons

• Photons

Materials with loosely bound valence electrons are known as ________.

• Conductors

• Insulators

• Semiconductors

• Dielectrics

Copper is a good conductor because:

• it has a high resistance to electricity.

• it has a low resistance to electricity.

• it is a non-metal.

• it is a good insulator.

Use the chart to solve the Resistance Codes: Orange, Red, Red, Gold.

• 3.2k ohms ±5%

• 2.2k ohms ±5%

• 4.7k ohms ±5%

• 1.5k ohms ±5%

Use the chart to solve the Resistance Codes: Brown, Black, Red, Silver.

• 1k ohms ±10%

• 100 ohms ±5%

• 10k ohms ±20%

• 1 ohm ±1%

Use the chart to solve the Resistance Codes: 520000 ± 5%.

• Green, Red, Yellow, Gold

• Blue, Orange, Yellow, Silver

• Red, Green, Blue, Gold

• Yellow, Violet, Red, Gold

Use the chart to solve the Resistance Codes: 61 ± 10%. What are the color codes?

• Blue, Brown, Black Gold

• Green, Brown, Brown, Silver

• Blue, Black, Red, Gold

• Green, Black, Red, Silver

What is the engineering notation for 0.0045?

• 4.5 x 10^-3

• 45 x 10^-4

• 4500 x 10^-6

• 0.45 x 10^-2

What must be the exponent of 10 in engineering notation?

• A multiple of 2

• A multiple of 3

• A multiple of 5

• A multiple of 10