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Magnetic Field and Magnetic Flux MCQs

Prepare for Magnetic Field and Magnetic Flux MCQs with verified questions, past-paper solutions, and conceptual explanations for CSS, PMS, FPSC, PPSC, and NTS examinations.

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Topic Notes: Magnetic Field and Magnetic Flux

These notes summarize the key preparation context before you attempt the MCQs. Review the topic focus, then practice the questions below with answers and explanations.

Quick Overview

Master Magnetic Field and Magnetic Flux MCQs for Competitive Exams with our comprehensive, verified question bank. Designed for students and competitive exam aspirants across Pakistan, this study resource provides topic-wise practice questions for CSS, PMS, FPSC, PPSC, SPSC, KPPSC, BPSC, NTS, and university entry tests.

Exam Focus
Aligned with FPSC, PPSC, and CSS syllabus criteria for Magnetic Field and Magnetic Flux.
Past Papers
Includes frequently repeated questions from past examinations.
Solved & Verified
Each question features verified answers and conceptual explanations.

Preparation Guide & Key Focus Areas for Magnetic Field and Magnetic Flux MCQs

When preparing for Magnetic Field and Magnetic Flux MCQs (Physics), focus on core definitions, historical timelines, relevant provisions, and commonly tested factual points. Review each question below, test your knowledge against the given options, and inspect the detailed explanation to solidify your understanding.

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251
A light aluminium disc is suspended by a long string in front of the pole of an electromagnet. When an alternating current is passed through the windings of the electromagnet, what happens to the disc?
252
A conducting circular loop of radius r carries a constant current i. It is placed in a uniform magnetic field B0 such that B0 is perpendicular to the plane of the loop. The magnetic force acting on the loop is
253
The magnetic field in a certain region is given by B = (4i + 5k) Wb/m^2. The flux passing through a 7 cm^2 area loop in this region if it lies flat in the xy-plane is
254
A loop carrying a current is free to rotate about a vertical axis in Earth's magnetic field. When it comes to rest, in which direction is the current across the top of the loop flowing?
255
Tick the wrong statement about Alnico V:
256
A paramagnetic material is kept in a magnetic field. The field is increased till the magnetisation becomes constant. If the temperature is now decreased, the magnetisation
257
27. Two concentric coils carry the same current in opposite directions. The diameter of the outer coil is twice as compared to the inner coil. If, at its centre, the smaller coil produces a magnetic field of 2 T, then the magnetic field at the common centre is
258
The period of oscillation of a magnet of a vibration magnetometer is 2.45 s at one place and 4.90 s at the other. The ratio of the magnetic fields at the two places is
259
The SI unit of magnetic flux is
260
A charge projected with velocity of 10 m/s in a magnetic field of 10 T at an angle of 60°, if force exerted on charge is 2.78 × 10^-17 N, then value of charge is: