Physics Chapter 4 – Electromagnetic Induction (Class 12) for FSC, Entry Tests & NTS Preparation
Chapter 4, Electromagnetic Induction, is an important topic for Class 12 students preparing for FSC board exams and engineering entry tests like ECAT, NUST, and FAST, as well as NTS exams. This chapter explains how a changing magnetic field induces an electric current and the principles behind electromagnetic induction. Understanding this topic is essential for studying electric circuits, transformers, and electrical machines.
PLS Boost Bundle
Get Access to 20 thousands+ MCQs Including Topical MCQs, Practice Tests, Mock Tests, Solved Past Papers, Flashcards, Notes, FLPS, and Much More.
A coil is placed near a magnet. Emf will be induced in it when
Which of the following statements is True about the A.0 and D.0 Generators?
Which of the following is not E.M wave?
ETEA 2019
Physics
Electromagnetic Waves
Elimination Tool:
Which of the following is CORRECT for photons?
PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:
The electromagnetic radiation which moves with high frequency will have _______ wavelength:
2022 PMC Test 3
Physics
Electromagnetic Waves
Elimination Tool:
In water pipes, ____ is used to detect leakages.
PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:
A.C generator can be converted into D.0 generator by
When interference between thin films occurs, the path difference between two interfering rays is 2t. If ‘n’ is the refractive index of the medium, the bright circles are obtained when ________ with m = 0, 1, 2, 3, …
NUMS 2019 Reconduct
Physics
Electromagnetic Waves
Elimination Tool:
Which list shows electromagnetic waves in order of increasing frequency?
ETEA 2018
Physics
Electromagnetic Waves
Elimination Tool:
A tuning fork A produces 4 beats with another tuning fork B. if the frequency of tuning fork B is 320 Hz, then the frequency of tuning fork A is:
PMC Practice 21
Physics
Electromagnetic Waves
Elimination Tool:
Applications of laser is/are:
NTS 2011
Physics
Electromagnetic Waves
Elimination Tool:
In single slit diffraction, when wavelength lameda increases:
PMC Practice 20
Physics
Electromagnetic Waves
Elimination Tool:
Beta rays cannot be stopped by:
PMC Practice 11
Physics
Electromagnetic Waves
Elimination Tool:
Electric Generators work on the principle of:
Which electrical quantity cannot be changed by a transformer?
The light we see is:
PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:
Unit of induced emf is
Infrasonic waves have a frequency of:
PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:
Electromagnetic waves are produced by:
NTS 2012
Physics
Electromagnetic Waves
Elimination Tool:
In medical scanning, which rays are used?
PMC Practice 18
Physics
Electromagnetic Waves
Elimination Tool:
If Ns/Np is the turn ratio, then for step up transformer
X-rays are used to measure?
PMC Practice 8
Physics
Electromagnetic Waves
Elimination Tool:
Characteristic x-rays are produced by:
PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:
A changing electric field produces
Torsion balance is used to measure:
Rays produced by LED are:
PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:
A stationary wave is formed in a pipe which is open at one end. If length of pipe is L, then what is the maximum possible wavelength of the wave.?
PMC Practice 20
Physics
Electromagnetic Waves
Elimination Tool:
A D.C generator is converted in A.C generator by
Microwaves are _______ waves.
PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:
A star moving away from earth shows:
PMC Practice 21
Physics
Electromagnetic Waves
Elimination Tool:
Orange light in a vacuum has a wavelength of 600 nm. What is the frequency of this light?
ETEA 2018
Physics
Electromagnetic Waves
Elimination Tool:
Polarization of light shows that it is:
PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:
The direction of induced emf is given by which of the following law?
Polarization explains light is ———
PMC Practice 8
Physics
Electromagnetic Waves
Elimination Tool:
Transformer cannot step up
Extraterrestial waves are also called:
PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:
A common material for cushioning objects in packages is made by trapping bubbles of air between sheets of plastic. Is this material more effective at keeping the contents of the package from moving around inside the package?
PMC Practice 8
Physics
Electromagnetic Waves
Elimination Tool:
When a conductor moves In magnetic field the Induced emf Is
In microwave ovens ____ is used to heat the food
PMC Practice 33
Physics
Electromagnetic Waves
Elimination Tool:
The wave in which crest and trough superimpose each other is ?
PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:
Germanium and silicon are semiconductors having crystalline structures. Both these materials have ______ valence electrons in their outermost shells.
NTS 2014
Physics
Electromagnetic Waves
Elimination Tool:
Resistance opposes current, inductor opposes
What will be the energy stored In an inductor of length 2m if a current of 10A passes through it
An electromagnetic wave travels in a straight line through a vacuum. The wave has a frequency of 6.0 THz. What is the number of wavelengths in a distance of 1.0 m along the wave?
ETEA 2018
Physics
Electromagnetic Waves
Elimination Tool:
If the current flow increases to 100 times, the energy stored in the inductor will increase to:
Which of the following does not travel in vacuum?
PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:
The distance between two consecutive nodes is:
PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:
Which rays are used in LASER?
PMC 2021 Tested
Physics
Electromagnetic Waves
Wave Motion and Sound
Elimination Tool:
The region that lies between IR and UV regions is called:
PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:
Induced emf depends upon:
Longitudinal standing wave, in second harmonic mode, is established in a tube that is open at both ends. The length of the tube is 0.8m. What is the wavelength of the waves that make up the standing wave?
PMC Practice 10
Physics
Electromagnetic Waves
Elimination Tool:
Which of the following phenomenon proves that light waves are transverse waves?
PMC Practice 4
Physics
Electromagnetic Waves
Elimination Tool:
Which one of the following requires no medium?
PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:
The direct exposure of sun light where ozone layer is depleted will cause:
2022 PMC Test 1
Physics
Electromagnetic Waves
Elimination Tool:
When carrying electricity on long distances. Step up transformer are used to:
Which of the following statement is true? i) Toroid is a solenoid bent into circular path ii) Solenoid is a tarok’ in open
Which of the following is not major application of electromagnetic induction
Michelson’s interferometer works on the principle of:
PMC Practice 21
Physics
Electromagnetic Waves
Elimination Tool:
Energy emitted in the form of visible radiation is called:
2022 PMC Test 1
Physics
Electromagnetic Waves
Elimination Tool:
Choose the correct arrangement of the various regions of the electromagnetic spectrum in terms of wave length.
ETEA 2017
Physics
Electromagnetic Waves
Elimination Tool:
Sound waves are:
PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:
A sound wave travels from a region of hot air into a region of cold air. How does frequency and wavelength of sound change?
PMC Practice 21
Physics
Electromagnetic Waves
Elimination Tool:
Microwave is:
2022 PMC Test 3
Physics
Electromagnetic Waves
Elimination Tool:
potential difference in charge between two points in a circuit is known as?
Which one of the following waves needs a medium to travel?
PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:
Key Concepts about Electromagnetic Induction
The chapter explains Faraday’s law of electromagnetic induction, Lenz’s law, and the concept of induced EMF and current. It covers self-induction, mutual induction, and the factors affecting induced current. The chapter also discusses practical applications such as electric generators, transformers, and induction coils. Each concept is explained with diagrams, examples, and step-by-step problem-solving methods. These concepts are highly important for FSC board exams and engineering entry tests like ECAT, NUST, and FAST.
Free Entry Test Preparation
Mastery of electromagnetic induction helps students understand induced currents, solve numerical problems, and apply concepts to electrical devices and energy systems. PLS Academy provides practice questions, solved past papers, and chapter-wise MCQs to help students revise these topics effectively. Regular study of this chapter improves problem-solving skills, conceptual clarity, and exam performance, ensuring students are well-prepared for FSC board exams, competitive entry tests, and NTS exams.
JazakAllah.
