Ley de ohm

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SKYLINE COLLEGE AUTOMOTIVE TECHNOLOGY

ELECTRICAL FORMULAS

E I R

VOLTS = AMPS X OHMS

WORKBOOK
Developed by K. Sullivan Revised 8/96

ELECTRICAL FORMULAS OHM'S LAW WATTS

EI R E

P I

VOLTS = AMPS X OHMS

POWER = VOLTS X AMPS

SERIES CIRCUIT FORMULAS
R T = R 1 + R 2 + R 3 ... + R N V T = V 1 + V 2 + V 3 ... + V N

E = volts I = amps R = resistancePARALLEL CIRCUIT FORMULAS
I T = I 1 + I 2 + I 3 ... +I N RT
=

R1 X R2 R1 + R2

1

OR

RT=

1

1

1

1

R 1 + R 2 + R 3..+ R N

AUTOMOTIVE TECHNOLOGY ELECTRICAL -OHMS LAW _________________________________________________________

1.

V=14v I= ?

R=2Ω

2.

V= ? I=4A

R=3Ω

3.

V=12v I=1.5A

R= ?

4.

V=12v I=?

R=6Ω

R=6Ω5.

V= ? I=6A

R=2Ω

R=6Ω

6.

V=18v I=3A

R=1Ω

R= ?

PAGE 1

7.

V=12v I= ?A

R=4Ω

R=6Ω

R=2Ω

8.

V= ? I= 10A

R=3Ω

R=4Ω

R=1Ω

9.

V=50v I=5A

R=4Ω

R=2Ω

R= ?

R1=4Ω 10. V= ?v I= 5A R2=4Ω

R1=10Ω 11. V=15 I= ?A R2=10Ω

R1=20Ω 12. V= ?v I=0.5A R2=5Ω

PAGE 2

R1=20Ω

13.

V= 12v I=0?A

R2=5Ω

R3=10Ω14.

V= ?v I=0.5A

R1=3Ω

R2=3Ω

R3=4Ω

R4=9Ω

15.

V= 24v I= ?A

R1=4Ω

R2=6Ω

R3=2Ω

R4=8Ω

R5=3Ω

R6=3Ω

R6=3Ω

16.

V=12v I=3A

R1=1Ω

R2=3Ω

VR2 VOLTAGE DROP?

PAGE 3

R1=6Ω 17. V= 24v

A

R2=4Ω

V
R1=6Ω 18. V= 24v R2=6Ω

A

R3=3Ω

R4=9Ω

V
R1=20Ω 19. V= 12v

A V
V= ?v 20. I= 2A R=4Ω

R2=10Ω

R3=20ΩA A
R=8Ω

V
R=2Ω

V

V

V

PAGE 4

R2=8 21. V= 12v

A

R1=2 R3=8

V
R1=50 22. V= 14v

V
R3=100 R4=100

A

R2=50

V
23. V= 14v

R5=75

V
R2=12

A AR1=2 R3=12

A V
R4=1

R3=12

V
PAGE 5

R2=60 24. V= 12v

A

R1=6 R3=36

V
R4=24

V A
R1=10

25.

A
12V R3=2

AA V A
R2=15

V

A
R3=18

V
PAGE 6

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