Page 21 - CHAPTER-1 (Electricity)
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CHAPTER 1
ELECTRICITY
Checkpoint-3
1- When a 12.5 V battery is connected across an unknown resistor, a
current of 2.5 mA in the circuit is observed. Compute the value of
the resistance of the resistor.
2- Electric current is produced by flow of
(A) electrons (B) All of these
(C) negative ions (D) positive ions
3- The direction of flow of conventional current is taken from
(A) negative to positive (B) positive to negative
(C) any of the above two (D) none of the above two
4- The law which provides a relation between electric potential
difference and an electric current is called
(A) Faraday's law (B) Oersted's law
(C) Ohm's law (D) Newton's law.
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