Electricity

Question 1

Define electric current and how it differs from electric voltage

Answer 1

Electric current is the flow of charged particles moving through a space.

Electric voltage is the pressure from an electrical circuit that pushes charged electrons

Question 2

What is ohms law? And how is it represented mathematically?

Answer 2

Ohms law is a law stating that electric current is proportional to voltage and inversely proportional to resistance.
V=IR

Question 3

What is the role of a resistor in an electrical circuit

Answer 3

The role of a resistor is to control the flow of electrons in a circuit

Question 4

Explain the difference between a parallel and a series circuit

Answer 4

In a parallel circuit there are two or more paths for electricity to flow and components are connected across each other

In a series circuit there is only one path for the electricity to flow and components are connected end to end.

Question 5

In a circuit with a resistor of 50 ohms, a current of 2 amperes flows through it. What is the voltage across the resistor according to Ohms law?

Answer 5

V=IR
V=2x50
Voltage=100V

Question 6

If a voltage of 12 volts is applied across a resistor and the current passing through it is 3 amperes, what is the resistance of the resistor according to Ohms Law?

Answer 6

R=V/I
R=12/3
R=4Ω