Electrical Principles Quiz 1

What happens when the distance between two charges is halved?

The force is multiplied by four because the distance squared times ½ is equal to ¼ because it is divided it is flipped

What can’t be measure on a live circuit?

Resistance because the ohmmeter sends a small current and it is live then it causes a short circuit

What makes an Atom positive?

A lack of electrons

Energy is?

The Product of power and time

A volt is?

A joule per coulomb

The rate of electron flow is measured in?

Amperes

The potential energy difference supplied by a source is measured in?

Volts

The opposition of the flow of electrons is?

Resistance

Like charges tend too?

Repel each other

A kilowatt hour unit is for?

The power used by a customer

The five essential components of a circuit are?

Source, Conductor, Load, Protection, Control

Current is measured using in a (blank) in a (blank) Circuit

Ammeter; Series (Wired in the circuit)

Voltage is measured using in a (blank) in a (blank) Circuit

Voltmeter; Parallel (Not wired in)

Resistance is measured using in a (blank) in a (blank) Circuit

Ohmeter; Parallel (Not wired in)

what is the conversion for 1 mile to Km

1=1.609

What is the conversion for hp to w

1=746

What is the conversion from kg to pounds

1=2.2

What is current?

The rate electrons flow

What is power?

The rate that work is done or energy is transferred

What is Voltage?

The potential difference between two points that causes current to flow

What is resistance?

The physical opposition to current

Energy

The ability to do work

10^-18

atto;a

10^-15

femto;f

10^-12

pico;p

10^-9

nano;n

10^-6

micro;q(backwards)

10^-3

mili;m

10^3

kilo;k

10^6

mega;M

10^9

giga;G

10^12

tera;T

10^15

pera;P

Conductor

Large number of free electrons that allow electrons to move easily

Insulators

Have very few free electrons and do not allow electrons to move easily

Potential

Voltage at a point with respect to another point

Potential difference

the difference in potential (voltage) between two points

Electromotive force

The force that establishes the flow of electrons (Current) that results because of the difference in potential

What is the law of conservation of energy?

Energy cannot be created or destroyed

Three essential components of an energy system are?

Energy source, transfer medium, Energy to work converter

What is a protection device?

Stops the circuit if any abnormal activity’s occur

Control device

Provides the ability to stop the transfer of energy

What is ohms law?

Current in a resistive circuit is directly proportionate to the applied voltage and inversely to its resistance