Answer:
(a) An instrument that
measures electric current in a circuit is called "ammeter". The unit
of electric current is ampere (A). 1 ampere is constituted by the flow of 1
coulomb of charge through any point in an electric circuit in 1 second.
(b) (i) (ii)
Variable
resistance Plug key or switch or rheostat (closes)
(c) (i)
(ii)
Following graph was plotted between V and I Values.
At
potential difference 0.8V,
At
potential difference 1.2 V,
Conclusion:
If be the current through XY
resistor and V be the potential difference across it, then the ratio constant.
and Ohm's law is oeyed.
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