Electric Circuits

Question 1

What are the 2 needed pieces required to have a circuit?

Answer 1

A power supply (the “push”)

A wire

Question 2

Anything that uses the electric energy in a circuit

Answer 2

Resistor

Question 3

Law that is the cornerstone for electric circuits

Answer 3

Ohm’s Law, V=IR

Question 4

Ohm’s Law (formula)

Answer 4

V=IR
V= potential difference (measured in volts)
I=current (measured in amperes)
R=resistance (measured in ohms)

Question 5

What creates the “push” in a circuit?

Answer 5

a Potential Difference (voltage)

Question 6

The quantity of charge moving past a point per second

Answer 6

Current (amps)

Question 7

T/F: Current is a measurement of the distance and speed at which a charge travels

Answer 7

False. Current is the quantity of charge. It is a quantity rate.

Question 8

By designation, current is the movement of what type of charge?

Answer 8

Positive Charge

Question 9

Formula for Current

Answer 9

I=q/t
I=current measured in amps
q=quantity of charge
t=time

Question 10

Measurement of the “electrical pump”

Answer 10

Voltage

Question 11

The key to voltage is a _______________ in volts

Answer 11

Difference

Question 12

What typically provides voltage?

Answer 12

A generator or battery

Question 13

This inhibits the flow of current and uses voltage

Answer 13

Resistor

Question 14

What is the relationship between the resistance and current?

Answer 14

When the voltage remains constant, resistance and current are inversely related. When one goes up, the other goes down.

Question 15

What are the two main types of circuits?

Answer 15

Series Circuit

Parallel Circuit

Question 16

A single pathway for current to flow

Answer 16

Series Circuit

Question 17

A series of branches for current to flow through

Answer 17

Parallel Circuit

Question 18

How do we determine the total resistance in a series circuit?

Answer 18

Is is the sum of all the resistors (e.g., all the bulbs added up)

Question 19

In a series circuit, what happens when one of the resistors (a bulb, e.g.) goes out?

Answer 19

The whole circuit shuts down.

Question 20

What is the relationship between Voltage and Resistance?

Answer 20

Big resistance, big voltage. The voltage distributed across each resistor is proportional to the resistance of that device.

Question 21

Circuit that has multiple paths for the current to leave the battery and finally return to it

Answer 21

Parallel Circuit

Question 22

In a parallel circuit, most of the current follows what path?

Answer 22

The path of least resistance

Question 23

What type of circuits run in our homes?

Answer 23

Parallel Circuits

Question 24

What shuts down circuits when they begin to overheat due to excessive current draw?

Answer 24

Fuses or Circuit Breakers