Working principle of AC devices (generator, transformer, metal detector)

This type of question, asked 3 times: 25 Jun 2022, 25 Jul 2022, 1 Feb 2023. All 3 questions below, oldest first.

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Question 1

25 Jun 2022

Match List-I with List-II: List-I List-II (A) AC generator (I) Detects the presence of current in the circuit (B) Galvanometer (II) Converts mechanical energy into electrical energy (C) Transformer (III) Works on the principle of resonance in AC circuit (D) Metal detector (IV) Changes an alternating voltage for smaller or greater value Choose the correct answer from the options given below:

List-I	List-II
(A) AC generator	(I) Detects the presence of current in the circuit
(B) Galvanometer	(II) Converts mechanical energy into electrical energy
(C) Transformer	(III) Works on the principle of resonance in AC circuit
(D) Metal detector	(IV) Changes an alternating voltage for smaller or greater value

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Question 2
25 Jul 2022
100 $When you walk through a metal detector carrying a metal object in your pocket, it raises an alarm. This phenomenon works on$
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Question 3
1 Feb 2023
8 $Match List I with List II: List I List II A. AC generator I. Presence of both L and C B. Transformer II. Electromagnetic induction C. Resonance phenomenon to occur III. Quality factor D. Sharpness of resonance IV. Mutual induction Choose the correct answer from the options given below:$
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List I	List II
A. AC generator	I. Presence of both L and C
B. Transformer	II. Electromagnetic induction
C. Resonance phenomenon to occur	III. Quality factor
D. Sharpness of resonance	IV. Mutual induction