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A wattmeter is connected as shown in the figure. The wattmeter reads

A wattmeter is connected as shown in the figure. The wattmeter reads Correct Answer Power consumed by Z<span style="position: relative; font-size: 10.5px; line-height: 0; vertical-align: baseline; bottom: -0.25em;">2</span>

Concept:

Wattmeter reads the power and it is given by

P = VPC ICC cos ϕ

VPC is the voltage across pressure coil

ICC is current flows through the current coil

ϕ is the phase angle between VPC and ICC

Application:

The circuit representation of the given question is as shown below.

  • The potential coil is connected across Z2.
  • It reads the voltage across Z2 only.
  • So, Wattmeter reads only power consumed by Z2.

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