Electrical Theory Module 3 - L

Question 1

Potential difference will exist between two points in a circuit that have a??

Answer 1

Difference in charge

Question 2

What is potential difference measured in??

Answer 2

Volts (V)

Question 3

Name 6 methods by which voltage can be produced.

Answer 3

Heat
Light
Induction
Pressure
Chemical 
Friction

Question 4

To produce a voltage chemically, the two metal plates need to be made of?

Answer 4

Dissimilar metals

Question 5

What’s an example of where voltage is produced by friction??

Answer 5

Sticking a balloon to wall

Question 6

What is the name given to the materials in a solar panel?

Answer 6

Semiconductors

Question 7

What holds the electron in orbit around the nucleus?

Answer 7

A force of attraction

Question 8

What is the outer orbit of the atom called?

Answer 8

The valance shell

Question 9

What is the electron in the outer orbit called?

Answer 9

The valance electron

Question 10

What is the polarity of an electron

Answer 10

Negative

Question 11

If an electron is removed from an atom, by an external force, the electron is now known as a??

Answer 11

Free electron

Question 12

If an electron is removed, by an external force, the atom is now known as a??

Answer 12

Positive ion

Question 13

The direction of electron flow is always?

Answer 13

Negative to positive

Question 14

If current were to flow from positive (+ve) to negative -ve, it would be called??

Answer 14

Conventional flow

Question 15

What is the circuit symbol for current?

Answer 15

I

Question 16

What is the unit of measurement of current?

Answer 16

Amps (A)

Question 17

What is ohm’s law?

Answer 17

Ohms law states the current flowing in a circuit is directly proportional to the applied potential difference and inversely proportional to the resistance in the circuit.

Question 18

Ohms law triangle equations

Answer 18

Voltage (V) = Current (I) x resistance (R)

Current (I) = voltage (V) divided by resistance (R)

Resistance (R) = voltage (V) divided by current (I)

Question 19

Select all the requirements needed to produce a voltage by induction

Answer 19

Relative movement, a magnetic field and an electrical conductor.