Electric circuit

Question 1

What is an electric circuit?

Answer 1

A complete circular path that electricity flows through.

Question 2

What are the components of an electric circuit?

Answer 2

Batteries are the power source of the circuit, switches are what controls the circuit which allows it to go on and off, and bulbs are a power consumer in the circuit which uses the power it is given.

Question 3

How do you calculate current?

Answer 3

I = V/R

Question 4

How do you calculate potential difference?

Answer 4

V = I x R

Question 5

How do you calculate resistance?

Answer 5

R = V/I

Question 6

How do you calculate power?

Answer 6

P = I x V

Question 7

What is the relationship between current and charge?

Answer 7

The most significant difference between the charge and the current is that the charge is the physical property of matter, whereas the current is the rate of flow of charges.

Question 8

How do you connect and ammeter to a circuit?

Answer 8

An ammeter is connected in series to a circuit.

Question 9

How do you connect a voltmeter to a circuit?

Answer 9

The voltmeter is connected in parallel to the load to measure the potential difference across it.

Question 10

What is electrical resistance?

Answer 10

A measure of the opposition to current flow in an electrical circuit.

Question 11

What factors affect the resistance of a wire?

Answer 11

Material: the material that is used in the circuit (How conductive it is)
Temperature: HIgh temperatures have a higher resistance while low temperature have a low
resistance
Length: longer wires have higher resistance while shorter wires have a low resistance
Cross Sectional Areas: Wide wires have less resistance while short wires have more resistance

Question 12

What is the relationship between resistance, potential difference, and current.

Answer 12

If we increase the voltage, the current goes up
If we decrease the voltage, the current goes down
If the voltage is high, the current is high
If the voltage is low, the current is low
If we increase the resistance, the current goes down for a given voltage
If we decrease the resistance the current goes up
If resistance is high current is low
If resistance is low current is high

Question 13

What is the relationship between energy and power?

Answer 13

As energy increases, power increases.
As power increases, energy increases.

Question 14

How do you calculate energy?

Answer 14

E = Pt

Question 15

How do you calculate power?

Answer 15

P = E/t

Question 16

What unit is energy, power, and time measured in?

Answer 16

Energy = Joules
Power = Watts
Time = Seconds

Question 17

What is a series circuit?

Answer 17

All circuit elements are arranged in a single path.

Question 18

What is a parallel circuit?

Answer 18

An electrical path that branches so that the current divides and only part of it flows through any branch.

Question 19

How does the type of circuit affect light bulb brightness?

Answer 19

Series: the more lightbulbs that are added it gets dimmer and dimmer the other bulbs get
Parallel: the brightness of the lightbulb stays the same every time you add a lightbulb