Circuits General Terms

Question 1

What is direct current?

Answer 1

The flow of electrons in one consistent direction.

Question 2

What is alternating current?

Answer 2

The flow of electrons that regularly changes direction and size.

Question 3

What is current?

Answer 3

Flow of electrons.

Question 4

Where does electric current flow?

Answer 4

From the negative end of the cell to the positive end.

Question 5

Scientists a long time ago and thought current flowed from the positive end to the negative end of a cell, it is still drawn this way using arrows.

What is this called?

Answer 5

Conventional current.

Question 6

What is potential difference?

Answer 6

The energy transferred between two points in a circuit.

Question 7

An ammeter measures ____________.
A voltmeter measures _____________________.

Answer 7

current
potential difference

Question 8

What is a charge?

Answer 8

The property of a body which experiences a force in an electric field.

Question 9

What is charge measured in?

Answer 9

Coulombs (C).

Question 10

Charge causes a ______ when near another charge.

Answer 10

force

Question 11

What is mA converted into Amps?

Answer 11

1/1000 of an Amp.

Question 12

Current is the ________________ of electric charge.

Answer 12

rate of flow

Question 13

The ______ the temperature, the lower the resistance.

Answer 13

higher

Question 14

The longer the wire, the _______ the resistance.

Answer 14

greater

Question 15

The greater the resistance, the ________ the current.

Answer 15

lower

Question 16

What is 1 MW in killowatts?

Answer 16

1000 KW.

Question 17

A variable resistor has its changes its resistance by altering the __________ of _____________.

Answer 17

length
material

Question 18

For a fixed resistor, the potential difference is ___________________ to the current.

Answer 18

directly proportional

Question 19

What is Ohm’s law?

Answer 19

Current through a resistor is directly proportional to the resistance across the resistor.

Question 20

What is an Ohmic conductor?

Answer 20

The current and potential difference of a resistor are directly proportional.

Question 21

The more energy in the bulb, the more the __________ of the bulb increases.

As the potential difference increases, so does the _____________ of the bulb.

The higher temperature increases the _________________ the filament, which makes it ______________ for the electrons to get past.

Answer 21

resistance

temperature

vibrations of ions

harder