Physics-
General
Easy
Question
A voltage source V = 
sin (100 t) is connected to a black box in which there can be either one element out of L, C, R or any two of them connected in series
At steady state. the variation of current in the circuit and the source voltage are plotted together with time, using an oscilloscope, as shown
The element(s) present in black box is/are :
- only C
- L and C
- L and R
- R and C
The correct answer is: L and R
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