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MHT CET 202626 AprilMorning Shift
Exam
MHT CET
Year
2026
Date
26 April
Shift
Morning Shift
Subject
Physics
Chapter
Alternating Current

MHT CET 2026 · 26 April · Morning Shift · Physics · Alternating Current

A step down transformer connected to an a.c. mains of 220 V is made...

A step down transformer connected to an a.c. mains of 220220 V is made to operate at 5.55.5 V, 4444 W lamp. The current in the primary circuit is (Ignore power losses)

Options

  1. A0.220.22 A
  2. B0.40.4 A
  3. C0.20.2 A
  4. D0.250.25 A

Correct answer

C. 0.20.2 A

Step-by-step solution

Given Vp=220V_p = 220 V, Vs=5.5V_s = 5.5 V, and output power Ps=44P_s = 44 W.

For an ideal transformer, the input power is equal to the output power.

Pp=PsP_p = P_s

VpIp=PsV_p I_p = P_s

220×Ip=44220 \times I_p = 44

Ip=44220=0.2I_p = \dfrac{44}{220} = 0.2 A

Answer: 0.20.2 A
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