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Ohm's Law
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This voltage is needed to cause a current of 200 mA to flow in a lamp of 25 ohm resistance:
a.
5 volt
b. 8 volt
c. 175 volt
d.
225 volt
Your answer "d" is not correct. "a" is the right answer.
E = I x R
= 0.2 x 25
= 5 volts.
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