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katrin [286]
3 years ago
9

Plz help me with this activity :,v

Physics
1 answer:
maksim [4K]3 years ago
6 0
18 is A let me figure out the rest
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Answer:

5 ohms

Explanation:

Given:

EMF of the ideal battery (E) = 60 V

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Current across the terminals (I) = 4 A

Let the internal resistance be 'r'.

Now, we know that, the voltage drop in the battery is given as:

V_d=Ir

Therefore, the voltage across the terminals of the battery is given as:

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Now, rewriting in terms of 'r', we get:

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Plug in the given values and solve for 'r'. This gives,

r=\frac{60-40}{4}\\\\r=\frac{20}{4}\\\\r=5\ ohms

Therefore, the internal resistance of the battery is 5 ohms.

5 0
3 years ago
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