The value of alternating emf E in the given circuit will be

Options

A. 220 V
B. 140 V
C. 100 V
D. 20 V

Answer

C

Explanation

For series L-C-R circuit,
`V=sqrt(V_(R)^(2)+(V_(L)-V_(C))^(2))`
`=sqrt((80)^(2)+(40-100)^(2))=100V`