physics 5. A 3.75 kw electric oven designed for use in Belgium where the rms vol

Question

physics 5. A 3.75 kw electric oven designed for use in Belgium where the rms voltage 220.0 v is used in the is output the effect of temperature on the heater's voltage the power of resistance, determine and the heater in the American household. Find also the peak current peak power of the oven in the two households. 6. (a) Find the equivalent resistance of the fouowing circuit and current through the all resistors. C 1.80.2 3.Eov (b) A battery produces 13.4 v when 3.20 A is drawn from it and 12.2 V when 5.60 A is drawn. Find the emfand the internal resistance of the battery.

Explanation / Answer

4,12 and 6 are in parllel

so 1/R123=1/R1+1/R2+1/R3

=1/4+1/12+1/6

=2 ohm

this in series with 1.8 and 1.2

Req=2+1.8+1.2

Req=5 ohm--answer to A

b)E=V+Ir

E=13.4+3.20r-----1

E=12.2+5.60r---2

solving 1 and 2 we get

0=(13.4-12.2)+(3.20r-5.60r)

0=1.2-2.4r

2.4r=1.2

r=1.2/2.4

r=0.5 ohm

E=13.4+3.20r

E=13.4+3.20*0.5

E=15V

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