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  • (a) How will you infer with the help of an experiment that the same current flows through every part of a circuit containing three resistors in series connected to a battery ? (b) Consider the given circuit and find the current flowing in the

(a) How will you infer with the help of an experiment that the same current flows through every part of a circuit containing three resistors in series connected to a battery ?

(b) Consider the given circuit and find the current flowing in the circuit and potential difference across the 15\Omega resistor when the circuit is closed. 

 

 

 

 
 
 
 
 

Answers (1)

(a)

  • Join three resistors of different values (R_1, R_2 and R_3) in series .
  • Connect them with the battery, an ammeter and plug key.
  • Change position of ammeter to anywhere in between the resistor and note the reading of ammeter each time.
  • The ammeter reading will remain same everytime. Therefore the same current flows through every part of the circuit containing three resistors in the series.

(b) Total resistance of the circuit = 

R = R_{1}+R_{2}+R_{3}

R = 5+10 +15= 30cm

Potential difference across the circuit

V = IR or I = \frac{V}{R}

I = \frac{30V}{30\Omega} = 1A

Potential difference across 15 ohm resister = IR

                                                                        1\times 15 = 15 volt

Posted by

Sumit Saini

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