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QNEET-2021-Ph-611: NEET 2021 Physics - Class 12 NEET-2021-Ph-611 Solution: A step down transformer connected to an ac mains supply of 220…
A step down transformer connected to an ac mains supply of 220 V is made to operate at 11 V 44 W lamp. Ignoring power losses in the transformer what is the current in the primary circuit? 4 A 0.2 A 0.4 A 2 A
Multiple Choice Options
- A 4A
- B 0.2A
- C 0.4A
- D 2A
Step-by-Step Verified Solution
Power loss = 0
_ = 100%
P in = P o/p
V P I p = V S I s
220 _ I p = 44
I p = 44 220 = 1 5 A = .2A