IIT JAM
Himanshu Pandey Asked a Question
September 11, 2020 1:59 ampts 30 pts
  • IIT JAM
  • Physics (PH)

Electricity

why the marking on the scale of direct current apparatus like ammeter, voltmeter, galvanometer etc are equidistant on the other hand for alternating current it is not??
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  • Aishwarya pandey Best Answer
    AC ammeter is constructed on the basis of heating effect of electric current. Since the heat produce varies as the square of current (and not directly with current) the division ma...
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  • Vaishali sharma thankyou
    The main reason behind it the heating effect of the apparatus. in Ac equipment there is chance of heating , and we know power dissipated is the square of the current, so to avoid o...
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    Vaishali sharma
    while in Dc apparatus we use concept of magetic coil so no such loss.
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