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Questions  

In the circuit shown, assuming all ammeters to be ideal, if readings of the hot wire ammeters A1 and A2 are  i1 and i2 respectively then reading of the hot wire ammeter A3
is

a
equal to i1+i2
b
greater than i1+i2
c
less than i1+i2
d
equal to 2i1−i2

detailed solution

Correct option is C

i3=i12+i22 and i3

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In the circuit shown in figure, R is a pure resistor, L is an inductor of negligible resistance (as compared to R), S is a 100 V 50 Hz ac source of negligible resistance. With either key K1 alone or K2 alone closed, the current is I0. If the source is changed to 100 V, 100 Hz the current with K1 alone closed and with K2 alone closed will be, respectively,


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