Electro Magnetic Induction And Alternating Currents Question 88
Question: A 40 W electric heater is connected to a 200 V, 50 Hz mains supply. The peak value of electric current flowing in the circuit is approximately [MP PET 1992]
Options:
A) 2.5 A
B) 5.0 A
C) 7 A
D) 10 A
Show Answer
Answer:
Correct Answer: C
Solution:
$ {i_{r.m.s.}}=\frac{{V_{r.m.s.}}}{R}=\frac{200}{40}=5\ A $
Þ $ i_{0}={i_{r.m.s.}}\sqrt{2}=7.07\ A $
