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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.
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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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181
If the number of turns of a solenoid (carrying a steady current I) is doubled without changing the length of solenoid, then magnetic field:
182
Lagging of magnetic flux density behind the magnetizing field is known as
183
41. A certain device used the Hall effect in a semiconductor to measure magnetic fields. A particular increase in temperature results in an increase of 2% in the number of charge carriers in the semiconductor. The sensitivity of the device
184
A long wire carries a steady current. First it is bent into a circular coil of one turn when the magnetic induction at the centre is B1. Then the same wire is bent to form a circular coil of smaller radius but two turns when the magnetic induction at the centre is B2. Then
185
A 10 cm long solenoid has 100 turns. What will be the magnetic field inside it along its axis if one microampere current is passed through it?
186
Materials that experience a force from stronger to weaker regions of magnetic field are called
187
An alpha-particle and a proton travel with same velocity in a magnetic field perpendicular to the direction of their velocities. The ratio of the radii of their circular paths is
188
A charged particle moves with velocity V in a uniform magnetic field B. The magnetic force experienced by the particle is
189
An electron moves in the x-y plane with a speed v = 10⁵ m/s. Its velocity vector makes an angle of 30° with x-axis. There is a magnetic field of magnitude 1 × 10⁻² Wb/m² directed along x-axis. The magnetic force exerted on the electron will be
190
The vertical component of earth's magnetic field is zero