Question 1

The term used to indicate power is ____.&#10;A) wattage&#10;C) current&#10;B) resistance&#10;D) voltage

Accepted Answer

Wattage is defined as the rate at which electrical energy is transferred, which is the most appropriate term to indicate power. Resistance measures how much a material or device impedes the flow of electrical current, current measures the flow of electric charge in a circuit, and voltage is the force that drives the electric current.

Question 2

A resistor is color-coded red, red, violet, orange, and brown. What are the value and tolerance of this resistor?&#10;A) 227,000  $\Omega$ &#177;1%&#10;B) 227 k $\Omega$ &#177;10%&#10;C) 2273  $\Omega$ &#177;1%&#10;D) 227  $\Omega$ &#177; 31%

Accepted Answer

The color code red, red, violet, orange, and brown corresponds to 2, 2, 7, multiplier of 1,000 (orange), and a tolerance of ±1% (brown). Therefore, the resistor value is 227,000 $\Omega$ or 227 k$\Omega$ with a tolerance of ±1%.

Question 3

What is the standard unit of measurement of electrical current?

Accepted Answer

The ampere (amp).

Question 4

Which of the following is not a method used to produce electricity?&#10;A) magnetism&#10;C) heat&#10;B) pressure&#10;D) absorption

Accepted Answer

Magnetism, pressure, and heat are all methods used to produce electricity. Absorption is not a method used to produce electricity, as it refers to the process of one substance taking in or soaking up another substance, and does not directly produce electricity.

Question 5

Electric ___________________ is the movement of electrons.

Accepted Answer

The answer of Electric ___________________ is the movement of electrons....

Question 6

The law of charges states that opposite charges attract and like charges repel.

Accepted Answer

The law of charges is a fundamental principle in electromagnetism that has been experimentally observed and confirmed. It states that opposite charges attract each other, while like charges repel each other.

Question 7

Current equals ____.&#10;A) voltage times resistance&#10;C) resistance divided by voltage&#10;B) voltage divided by resistance&#10;D) resistance plus voltage

Accepted Answer

According to Ohm's Law, current (I) equals voltage (V) divided by resistance (R), expressed mathematically as I = V/R. Therefore, the correct choice is B.

Question 8

If the voltage of a circuit decreased by half and the circuit resistance remained the same, the total current would ____.&#10;A) decrease to zero&#10;C) remain the same&#10;B) decrease by half&#10;D) double

Accepted Answer

According to Ohm's Law, I=V/R. If the voltage decreases by half and the resistance remains the same, the current will also decrease by half. Therefore, the correct answer is B, decrease by half.

Question 9

Resistors reduce or limit current in a circuit.

Accepted Answer

This is because resistors provide a resistance to the flow of current and therefore limit the amount of current that can flow through a circuit.

Question 10

Given the power law, power equals what?

Accepted Answer

The answer of Given the power law, power equals what?...

Question 11

If you needed a 680 k$\Omega$&#177;5% resistor, you would look for a resistor with which color code?&#10;A) Blue, gray, yellow, and silver&#10;B) Blue, gray, black, and yellow&#10;C) Green, gray, orange, and gold&#10;D) Blue, gray, yellow, and gold

Accepted Answer

The answer of If you needed a 680 k$\Omega$&#177;5% resistor,...

Question 12

The term used to indicate opposition to current flow is ____.&#10;A) wattage&#10;C) current&#10;B) resistance&#10;D) voltage

Accepted Answer

The answer of The term used to indicate opposition to...

Deck 14: Electrical Fundamentals