SELECT * FROM question_mgmt as q WHERE id=3817 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 when a 12 v battery is connected across an unknown

Question:

When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistor.

Answer:

Resistance (R) of a resistor is given by Ohm’s law as,

Where,

Potential difference, V = 12 V

Current in the circuit, I = 2.5 mA = 2.5x10-3 A

Therefore, the resistance of the resistor is 4.8 kΩ.


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