SELECT * FROM question_mgmt as q WHERE id=3811 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=9 AND subId=16 AND chapterId=263 and ex_no='8' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 10th science Electricity which of the following terms does not represent el

Question:

Which of the following terms does not represent electrical power in a circuit?

(a) I2R          (b) IR2          (c) VI          (d) V2/R

Answer:

(b) Electrical power is given by the expression, P = VI … (i)

According to Ohm’s law, V = IR … (ii)

Where,

V = Potential difference

I = Current

R = Resistance

 P = VI

From equation (i), it can be written

P = (IR) × I

 P = I2R

From equation (ii), it can be written

Power P cannot be expressed as IR2.


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