• # question_answer The value of alternating emf $\varepsilon$ in the given circuit will be A) 220 V              B) 140 VC) 100 V  D) 20 V

$E=\sqrt{V_{R}^{2}+{{({{V}_{C}}-{{V}_{L}})}^{2}}}=\sqrt{{{80}^{2}}+{{(100-40)}^{2}}}$ $=100\,V$ Hence, the correction option is (c).