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Electric Energy lesson illustration

Is this circuit a Series or Parallel? Why?

Electric Energy lesson illustration

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Series or Parallel?

Electric Energy lesson illustration

Answer - Parallel - same V

Electric Energy lesson illustration Electric Energy and Heat

(W) Electric energy consumed or released as heat

(All equations on reference table)

(J) W = Pt = [V²/R]t

= VIt = I²Rt

An electric iron operating at 120 volts draws 10. amperes of current. How much heat energy is delivered by the iron in 30. seconds?

a) 1.2 x 10³ J	c) 3.6 x 10⁴ J
b) 3.0 x 10² J	d) 3.6 x 10³ J

V = 120 V

I = 10. A

t = 30. sec

W = ?

W = VIt

= 120. V(10. A)(30. sec)

W = 3.6 x 10⁴ J

Electric Energy lesson illustration

What's wrong with this picture?

Electric Energy lesson illustration

Ammeter should be
in series with resistor

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