Which actions change the flux or induce an emf in a coil

This type of question, asked 2 times: 1 Feb 2023, 6 Apr 2023. All 2 questions below, oldest first.

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Question 1
1 Feb 2023
105 $A coil is placed in magnetic field such that plane of coil is perpendicular to the direction of magnetic field. The magnetic flux through a coil can be changed: (A) By changing the magnitude of the magnetic field within the coil. (B) By changing the area of coil within the magnetic field. (C) By changing the angle between the direction of magnetic field and the plane of the coil. (D) By reversing the magnetic field direction abruptly without changing its magnitude. Choose the most appropriate answer from the options given below:$
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Question 2
6 Apr 2023
19 $The induced emf can be produced in a coil by (A) moving the coil with uniform speed inside magnetic field (B) moving the coil with non-uniform speed inside uniform magnetic field (C) rotating the coil inside the uniform magnetic field (D) changing the area of the coil inside the uniform magnetic field Choose the correct answer from the options given below:$
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Question 1