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Chapter 31: Q52P (page 938)

An ac voltmeter with a large impedance is connected in turn across the inductor, the capacitor, and the resistor in a series circuit having an alternating emf of 100V (RMS); the meter gives the same reading in volts in each case. What is this reading?

Short Answer

Expert verified

Voltmeter reading for parallel combination with the inductor, resistor, and capacitor is the same as 100V.

Step by step solution

01

Listing the given quantities:

Alternating emf =100V

02

Understanding the concepts of impedance, capacitance, and resistance:

Whenever we connect an electronic device (with high impedance) to another circuit with finite impedance in parallel, there is no effect on the impedance of the circuit. In this case, we are connecting the voltmeter with different components.

03

Explanation:

Whenever there isa connection between an electronicdevice (with high impedance) with another device with finite impedance in parallel, there is no effect on the impedance of the circuit.

Therefore, since the ac voltmeter is connected in parallel with the inductor, in this case, the voltmeter reading will be100V.

Since the ac voltmeter is connected in parallel with the resistor, in this case, the voltmeter reading will be100V.

Since the ac voltmeter is connected in parallel with the capacitor, in this case, the voltmeter reading will be 100V.

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