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Question

_____________ electrical static device is used to move the electric face signals or frequency from the primary circuit to the second circuit.

This question was previously asked in
RPF SI 2018 Question Paper PDF (10-Jan-2019) (Shift 1)
The correct answer is

Transformer

The stem describes a static electrical device (one with no moving parts) that transfers alternating electrical signals or power from a primary circuit to a secondary circuit.

A transformer does exactly this. It has a primary and a secondary coil wound on an iron core, and works on electromagnetic (mutual) induction; it can step voltage up or down without changing the frequency.

A generator has rotating parts and converts mechanical energy into electrical energy; a transistor amplifies or switches signals; a rectifier converts AC into DC.

Hence, the device is a Transformer.

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Important Questions from Current Electricity

  1. Which of the following is a bad conductor of electricity?

  2. In general, in an alternating current circuit

  3. The laws of electromagnetic induction have been used in the construction of a

  4. A 220 volt and 100 watt bulb is connected to a 110 volt source. The power consumption by the bulb is

  5. Which of the following statement is correct?

    I. 1 kWh = 3.6 × 10 6J.

    II. The SI unit of electric current is the ampere.

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