Module 1- Current. Voltage And Resistance.

Question 1

Are negatively charged electrons attracted to positively charged ions? If so what is it called?

Answer 1

Yes. It’s called an Electric Current.

Question 2

What is one coulomb?

Answer 2

6.24x10^18

Question 3

What is the symbol for Coulomb’s?

Answer 3

Q

Question 4

What is the symbol for current?

Answer 4

I (Measured in Amps- A)

Question 5

How is time calculated? Hours, minutes, or seconds?

Answer 5

Seconds

Question 6

What is the formula for calculating current with time and charge?

Answer 6

I= Q/t

Question 7

What is “Hole flow”?

Answer 7

AKA- conventional flow, positive to negative (opposite of electron flow)

Question 8

What is voltage?

Answer 8

Imbalance of electron distribution.
Electromotive force!

Question 9

What is the symbol for EMF? And what is it’s symbol

Answer 9

E, and V (volts)

Question 10

What are sources of EMF?

Answer 10

Magnetic- generators
Chemical- batteries
Friction- rubbing a balloon on your head
Heat- thermocouples
Pressure- BBQ igniters
Light- satellite/ calculators

Question 11

How is voltage drop shown?

Answer 11

V (subscript)

Question 12

What is resistance?

Answer 12

Defined as the opposition a material offers to flow due to structure.

Question 13

Symbol for Resistance?

Answer 13

R or Ohms omega sign

Question 14

What is the formula for Ohms Law, and what do each of the symbols represent?

Answer 14

I= E/R

I= Current (Amps)
E= EMF (Volts)
R= Resistance (Ohms)

Question 15

Is electric current directly or inversely proportional to voltage?

Answer 15

Directly

Question 16

Is electric current directly or inversely proportional to resistance?

Answer 16

Inversely.

Question 17

What are the three ways ohms law can be represented and transposed?

Answer 17

I= E/R

E= I*R

R= E/I