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How are motors and generators different?

1 answer:

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A generator converts mechanical energy into electrical energy, while a motor does the opposite - it converts electrical energy into mechanical energy

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A flashlight bulb is connected to two dry cells with an equivalent voltage of 4.50 V. If the bulb draws a current of 12.0 mA (10

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Answer:

b. 375 Ohms

Explanation:

<u>Given the following data;</u>

Voltage = 4.5 V

Current = 12 mA

To find the resistance;

Ohm's law states that at constant temperature, the current flowing in an electrical circuit is directly proportional to the voltage applied across the two points and inversely proportional to the resistance in the electrical circuit.

Mathematically, Ohm's law is given by the formula;

$V = IR$

Where;

V represents voltage measured in voltage.
I represents current measured in amperes.
R represents resistance measured in ohms.

<u>Conversion:</u>

1000 mA = 1 A

12 mA = 12/1000 = 0.012 A

$R = \frac {V}{I}$

Substituting into the formula, we have;

$R = \frac {4.5}{0.012}$

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