CBSE Class 10 Answered
Q .S student veryfing Ohm,s law computed the value of resistnce of a resistor for each set of onservation . However, the values of the resistance were slightly different from the actual value . Is his expt. wrong? Justify(2marks)
Asked by sucharitasahoo1 | 15 Mar, 2018, 03:08: AM
Expert Answer
The experiment involves passing a known current through a resistor and determining its resistance from the measured potential difference across the resistor. When current is passed through resistor, power dissipation (I2R effect) is taking place. Due to this, resistor is getting heated up and its resistance value may increase slightly. If the experiment involves long time, then this may be one of the reason for getting slightly different value.
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