USING ELECTRICITY Useful Circuits

Question 0

Give rule for current in series

Answer 0

Same at all points as only one path

Question 1

When switches are in series both just be closed for circuit to operate. Give examples

Answer 1

Central heating + thermosat

Question 2

Rule for current in parallel

Answer 2

Sum of current in each branch,

Isupply=I1+I2

Question 3

Rule for voltage in series

Answer 3

Sum of all voltages

Vs=V1+V2

Question 4

Rule for voltage in parallel

Answer 4

Same as supply

Question 5

Give an example of a continuity tester

Answer 5

Batter and a bulb

Question 6

What would show short circuit on an ammeter

Answer 6

Low current

Question 7

What would show on an ammeter in an open circuit

Answer 7

High current

Question 8

Are car lightning in series or parallel?

Answer 8

Parallel so that if one blows the other stay on, however ignition switch are in series.

Question 9

Are courtesy lights in parallel or series?

Answer 9

Parallel so that if one is open light comes on.

Question 10

Resistance in series formula

Answer 10

Rtotal= R1+R2…

Question 11

Resistance in parallel formula

Answer 11

1 1 1
—— = ——- + ——-
Rt R1 R2

Question 12

How many electrical paths does a series circuit have?

Answer 12

1

Question 13

How many electrical paths does a parallel circuit have?

Answer 13

More than one

Question 14

What direction to electrons flow in a circuit?

Answer 14

From the negative to the positive.

Question 15

Give all rules for series (current, voltage, resistance)

Answer 15

Current is same at all points, voltage is equal to the sum of voltages, resistance is same of individual resistances

Question 16

Give rules for parallel circuits, current voltage resistance

Answer 16

Current splits up so sum of resistances, voltage supply is equal to the supply of the branches(each one) and total resistances is 1 over total resistance is equal to 1 over R1 + R2