TestUstad
Asked in Premeth 2025 — Biomolecules, Nuclear Physics, Alternating Current, Comprehension 2025Moderate

To measure an A.C. voltage by using an A.C potentiometer, it is desirable that the supply for the potentiometer is taken?

Correct answer: A. From a source which is not the same as the unknown voltage.

  • A. From a source which is not the same as the unknown voltage.
  • B. From a battery.
  • C. From the same source as the unknown voltage
  • D. Any of the above

Explanation

The correct answer is option (a) - From a source which is not the same as the unknown voltage. This ensures that the AC potentiometer has a stable and independent reference voltage, essential for accurate measurement. Option (b) is incorrect because a battery provides DC voltage, which cannot be used with an AC potentiometer. Option (c) is not ideal as using the same source might cause inaccuracies due to potential phase or frequency differences. Option (d) is incorrect because it suggests all options are suitable, which is not the case.

Last updated

About AC Through Resistor, Capacitor and Inductor

Alternating current through a resistor, capacitor and inductor involves phase relationships between voltage and current, reactance, impedance and energy transfer. A resistor keeps voltage and current in phase, while a capacitor and inductor produce opposite phase shifts, a distinction used in circuit diagrams and numerical calculations.

Practise Alternating Current

592 free Alternating Current MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.

Start a free Alternating Current testAll Alternating Current MCQs

Exams that ask Physics questions like this

Physics is on 13 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.

NET Physics60 MCQsNUMS Physics40 MCQsAKU Physics36 MCQsDUHS Physics36 MCQsETEA MDCAT Physics36 MCQsKMU Physics36 MCQsMDCAT Physics36 MCQsECAT Physics30 MCQsETEA Engineering Admission Test Physics30 MCQsGIKI Physics30 MCQsNED Physics30 MCQsPIEAS Physics30 MCQsPMD Physics25 MCQs

Related questions

A 10Ω electric heater is connected to a 220V 50Hz mains supply. What is the peak value of the potential difference across the heater element ?

A 220 V main supply is connected to a resistance of 100 k ohms. The effective current is

A 50-m coil carries a current of 2 amperes. The energy stored in a magnetic field is:

A.C. and D.C. have the same __________?

A.C and D.C have the same: