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Power and Energy

Power and Energy

Assessment

Presentation

Physics

1st - 6th Grade

Hard

Created by

Joseph Anderson

FREE Resource

6 Slides • 6 Questions

1

Electric Energy and Power

By Akram Varqid

2

Electric as a type of energy

The higher electricity, Higher energy

Electric energy can be related with voltage, current and resistance

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3

From V = W/Q and I = Q/t

W = Q V and Q=It

We will get W = It x V or simpler as

W = Vit​

Work and Energy are the same​, their si unit is Joule

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4

Modifying Formula

Sometimes you dont get V, I and T

From V = IR, use it to replace what you don't have.

If you dont have V, Replace it with IR and so on. So we got:

E=VIt

E= (V2/R)t

E= I2Rt​

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5

Power = Energy / time

Similar with electrical power, remove time from Energy formula

P = VI

P = V2/R

P= I2 R​

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6

Quizzez

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7

Multiple Choice

E = 10

V = 8

I = 6

t = ?

1

0.2 s

2

0.3 s

3

0.4 s

8

Multiple Choice

E = 10

V = 8

I = 6

What is the power?

1

80

2

60

3

48

9

Multiple Choice

E = ?

V = 5

R = 2

t = 10

1

125

2

250

3

375

10

Multiple Choice

E =

V = 5

R = 2

t = 10

What is the power?

1

12.5

2

25.0

3

37.5

11

Multiple Choice

E= 20

I = 9

R = ?

t = 20

1

0.01

2

0.02

3

0.03

12

Multiple Choice

E= 20

I = 9

R = ?

t = 20

What is the power?

1

0.05

2

0.0005

3

0.5

Electric Energy and Power

By Akram Varqid

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