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Solution


Q.

Read the passage given below and answer the following questions from (i) to (v).

Ohm’s law is the relationship between potential difference and current in a circuit which was first established by George Simon Ohm. The law states that the current passing through a metallic conductor is directly proportional to the potential difference applied between its ends. V∝I i.e., V=kI  Where k is the resistance offered by the conductor and is constant for a given conductor. Although a large class of materials is known to follow Ohm’s law, there do exist materials used in circuits that do not follow the direct relationship between V & I.

 

(i) If in a circuit both the potential difference and resistance are doubled, then:
1 current is doubled.  
2 current is halved.  
3 current remains same.  
4 current is four times.  

Ans.

(3)