You purchase a 131 W ight bub wchw manutactured for use in Europe where the powe

Question

You purchase a 131 W ight bub wchw manutactured for use in Europe where the power grid operales at an elecihic potential dieence of 240% You then proceed to use the European bub at home in the Urvted Sates, where the power gnd operales at an electric potential difference of 120V. Comparing the European bub to a 131 WI ight bulb manfachured for use in the Unled Stales give how brighedim the European cub a as a factor of the US bub Hnt The brightness of a butb is proportional to the the oument which uns trough its lament Check How many 143 W light bulbs connected in arael can be used without bowing a 11.7 A se? The potental dhenence of a wall oylet in the Usted Stes is 120V. Hec You cannt have tactionhb r G ive your aoweri Power lo53 here to

Explanation / Answer

From the given question,

In Europe, power=131 W, potential difference= 240 V

In United States, power=131W, potential difference= 120 V

power= potential difference * current

In Europe, 131= 240 * I1

I1= 131/240

In United states, 131= 120 * I2

I2= 131/240

brightness is proportional to current

Brightness of bulb in Europe / Brightness of bulb in United states = I1/I2

=(131/240)/(131/120)

=1/2

Brightness of European bulb is twice of brightess of United States bulb.

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power=143 W, maximum current=11.7A, potential difference= 120V

current(I)= power(P)/potential difference(V)

I= 143/120

=1.192

Number of bulbs in parallel= 11.7/1.192=9.81

Number of bulbs in parallel=9

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For the next part ,image of numbers are not clear.

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