Electricity

Question 1

What is electromotive force?

Answer 1

It is the work done by a source driving a unit charge round a complete circuit.

Question 2

What is electricity?

Answer 2

It is the flow of electric charges.

Question 3

What is electric current?

Answer 3

It is the rate of flow of electric charges.

Question 4

What is potential difference?

Answer 4

It is the amount of energy needed to drive an electric circuit across 2 points.

Question 5

What is resistance?

Answer 5

It is the opposition to the flow of electric charges in the circuit.

Question 6

What is the 2 types of resistance?

Answer 6

Rheostat and fixed resistors.

Question 7

Are current the same everywhere in series circuit?

Answer 7

yes

Question 8

What is the SI unit for resistance?

Answer 8

Ω

Question 9

Higher resistance = lower current. Agree?

Answer 9

Yes

Question 10

Formula for resistance in series.

Answer 10

R(total) = R1+R2+…..

Question 11

Formula for resistance in parallel.

Answer 11

1/R(total) = 1/R1 +1/R2 + 1/R3... 
[1/R?]-1 = R total

Question 12

Total resistance is the same as effective resistance. Agree?

Answer 12

Yes.

Question 13

Higher voltage = higher resistance in series. Agree?

Answer 13

Yes, if current is constant.

Question 14

How to find voltage in parallel series circuit?

Answer 14

Take the sum of potential difference.

Question 15

Is voltage the same everywhere in parallel circuit?

Answer 15

yes

Question 16

How to find current in series circuit?

Answer 16

the the current passing through dry cell and add together.

Question 17

Is bulb brighter in parallel circuit or series?

Answer 17

parallel. Lower resistance than total resistance. so more current passing through.