Chapter 3 - Electricity (3.2)

Question 1

Current in a series circuit?

Answer 1

The same through all

Question 2

Current in a parallel circuit?

Answer 2

Shared

Question 3

Voltage in a series circuit?

Answer 3

Shared

Question 4

Voltage in a parallel circuit?

Answer 4

Same through all

Question 5

How do you work out the current a cross a component in a parallel series?

Answer 5

I=V/R

Question 6

How do you work out the resistance in parallel circuit?

Answer 6

1/RT = 1/R + 1/R

Question 7

How do you work out the resistance in series circuit?

Answer 7

Rtot = R + R + R

Question 8

What is the electric current rule?

Answer 8

Sum of the currents entering a junction = 0

Question 9

What is the voltage ru;e?

Answer 9

Voltage around a closed loop the sum of emfs = sum of pds

Question 10

What is V1/R1 equal to?

Answer 10

V2/R2

Question 11

What is V1/V2 equal to?

Answer 11

R1/R2

Question 12

What is the potential divider equation?

Answer 12

Vout = Vin x (R2/(R1+R2) ((R2 = component of interest)

Question 13

What is a potentiometer?

Answer 13

Version of potential divider which a single resistance wire is used in two parts to form the two resistances.

Sliding connection on wire can be adjusted to alter the comparative resistances and thus alter the output of pd from potentiometer

Question 14

EMF formula

Answer 14

EMF= V +Ir

Question 15

What is the internal resistance?

Answer 15

The resistance of an emf source

Question 16

Electrical work done equation

Answer 16

W = VQ (Q=it)

Question 17

Electrical power equation

Answer 17

P=VI