Loading [MathJax]/jax/output/HTML-CSS/jax.js


1)

 if i1=3 sin ω t and i2= 4 cos ω t, the i3 is 

1752021883_p3.JPG

 


A) 5(sinωt+530)

B) 5(sinωt+370)

C) 5(sinωt470)

D) 5(cosωt+530)

Answer:

Option A

Explanation:

From Kirchhoff's current law,

 i3=i1+i2=3sinωt+4sin(ωt+900)

=32+42+2(3)(4)cos900sin(ωt+ϕ)

 where  tanϕ=4sin9003+4cos900=43

     i35(sinωt+530)