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12. If the Current I through a resistor is increased by 100% (assume that temperature remains unchanged), the increase in po

By Charlotte

12. If the Current I through a resistor is increased by 100% (assume that temperature remains unchanged), the increase in power dissipated will be
(a) 100%
(b) 200%
(c) 300%
(d) 400%
IN THE ABOVE QUESTION, PLEASE EXPLAIN WHY WE USED THE FORMULA P=I²R INSTEAD OF P=VI.
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Charlotte

1.If 1=3

2=3

3=5

4=4

5=4

Then, 6=?​

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2 thoughts on “<br />12. If the Current I through a resistor is increased by 100% (assume that temperature remains unchanged), the increase in po”

  2. Answer:

    c) 300%

    Explanation:

    Let original value of current be I amperes

    The new value of current becomes I + (100% of I) = I + I = 2I

    So the new value of power dissipated = (2I)²R = 4I²R = 4P

    The original value of power dissipated was P

    So the change in power dissipated = 4P – P = 3P

    In terms of %, it comes out to a % change of 300%

    Hence, increase in power dissipated will be 300%

    Note: We use P = VI when voltage is constant through the resistor and we use P = I²R when the current is constant through the resistor. Since here there is no mention of the voltage, but there is a mention of current, we use this formula for the power dissipated.

    Do mark as brainliest if this helped!

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