Unit 202: Principles of Electrical Science – Resistors Parallel

Match the correct answers for Rt of resistors in Parallel

• R1 1.5 Ω, R2 4 Ω, R3 12 Ω

  1 Ω

• R1 6 Ω, R2 20 Ω, R3 30 Ω

  4 Ω

• R1 12 Ω, R2 6 Ω, R3 4 Ω

  2 Ω

• R1 30 Ω, R2 90 Ω, R3 45 Ω

  15 Ω

• R1 120 Ω, R2 80 Ω, R3 48 Ω

  24 Ω

Fill in the blank value for resistors in parallel. R1=120 Ω, R2= … Ω, RT=48 Ω

• 78

• 80

• 86

• 90

Fill in the blank value for resistors in parallel. R1= … Ω, R2=48 Ω, RT=12 Ω

• 14

• 16

• 18

• 20

Fill in the blank value for resistors in parallel. R1= … Ω, R2=50 Ω, RT=40 Ω

• 200

• 190

• 220

• 180

Fill in the blank value for resistors in parallel. R1=40 Ω, R2= … Ω, R3=20 Ω, RT=10 Ω

• 20

• 30

• 40

• 50

Fill in the blank value for resistors in parallel. R1=60 Ω, R2= … Ω, R3=20 Ω, RT=10 Ω

• 10

• 15

• 30

• 40

Two resistors of 48Ω and 80Ω are connected together in parallel. What would the value of a third resistor have to be, when connected in parallel with the first two, in order to give a combined resistance total of 15Ω?

• 30 Ω

• 32 Ω

• 30.5 Ω

• 60 Ω

A parallel circuit containing three resistors of 1.5Ω, 4Ω and 12Ω is connected across a 10 volt supply. Calculate the current flowing in each resistor and prove Kirchhoff's current law.

• 6.56A, 2.32A, 0.81A

  IT = 10.5A

• 6.68A, 2.25A, 0.89A

  IT = 10A

• 6.6A, 2.2A, 0.88A

  IT = 11A

• 6.67A, 2.5A, 0.83A

  IT = 10A

A parallel circuit containing three resistors of 18Ω, 20Ω and 30Ω is connected across a 144 volt supply. Calculate the current flowing in each resistor and prove Kirchhoff's current law.

• 8A, 7.2A, 4.8A

  IT = 20A

• 7A, 6.2A, 3.8A

  IT = 18A

• 8.2A, 7.2A, 4.9A

  IT = 21A

• 8A, 7.35A, 4.4A

  IT = 21.5A

A parallel circuit containing three resistors of 30Ω, 90Ω and 45Ω is connected across a 30 volt supply. Calculate the current flowing in each resistor and prove Kirchhoff's current law.

• 1A, 0.31A, 0.67A

  IT = 2A

• 1A, 0.33A, 0.68A

  IT = 2A

• 1A, 0.33A, 0.67A

  IT = 2A

• 1A, 0.33A, 0.67A

  IT = 2.2A