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CBSE Class 10 Answered

Experiment to verify ohm's law
Asked by adityaambhure123 | 07 May, 2020, 09:42: AM
answered-by-expert Expert Answer

Ohm's law states that under constant temperature, the current passing through conductor is directly proportional to potential difference applied across it.
 
Thus,
 
 V equals R cross times I w h e r e comma space V minus p o t e n t i a l space d i f f e r e n c e R minus space R e s i s tan c e space I minus space C u r r e n t
 
Ohm's law can be verified by following below steps of experiment.

The experimental setup for Ohm’s law is shown below.
 

 

First the key K is closed and the rheostat Rh is adjusted to get the minimum reading in the ammeter A and voltmeter V.
The sliding terminal of rheostat is then moved to increase the current gradually and each time the value of current I flowing in the circuit and the corresponding value of potential difference V across the resistance wire R, are recorded. In this way, different sets of values of V and I are recorded.
Then for each set of values of V and I, the ratio V/I is calculated.
The ration of V/I gives a constant value which is called resistance of the conductor.
The table for the readings noted is shown below.
Answered by Shiwani Sawant | 07 May, 2020, 10:12: AM

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