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olga_2 [115]
3 years ago
5

Which hemisphere is experiencing summer in july?

Physics
1 answer:
valentinak56 [21]3 years ago
6 0

The Northern Hemisphere

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The current in a series circuit is 19.3 A. When an additional 7.40-Ω resistor is inserted in series, the current drops to 13.4 A
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16.8ohms

Explanation:

According to ohm's law which states that the current passing through a metallic conductor at constant temperature is directly proportional to the potential difference across its ends.

Mathematically, V = IRt where;

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I is the current

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For a series connected circuit, same current but different voltage flows through the resistors.

If the initial current in a circuit is 19.3A,

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When additional resistance of 7.4-Ω is added and current drops to 13.4A, our voltage in the circuit becomes;

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Note that the initial resistance is added to the additional resistance because they are connected in series.

Equating the two value of the voltages i.e equation 1 and 2 to get the resistance in the original circuit we will have;

19.3R = 13.4(7.4+R)

19.3R = 99.16+13.4R

19.3R-13.4R = 99.16

5.9R = 99.16

R= 99.16/5.9

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The resistance in the original circuit will be 16.8ohms

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