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Welcome to the BYJU’S JEE questions and answers page! Students and aspirants can access a huge library of questions covering all the important topics that are included in the JEE syllabus. The questions and answers have been prepared by a group of experienced subject matter experts. Students will find questions framed from Physics, Maths and Chemistry subjects.

The JEE questions and answers discussed here will give a much clearer idea of many JEE topics such as gravitation, thermodynamics, atomic structure, chemical bonding, binomial theorem, quadratic equation, etc. The questions have further been answered in an informative and easy to understand manner.

Alternatively, the questions are very important from an examination point of view and can help in quick revision of the different topics. Additionally, students can also clear their doubts and confusion by referring to these questions regarding any concept or topic. Students will find questions that are both conceptual and descriptive including definitions, principles, formulas, examples of, properties of, and types.

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Answer: 1) 400nm to 700nm 2) -∞ to +∞ 3) 1mm to 700nm 4) 700nm to 800nm Answer: 1) 400nm to 700nm Solution: Our eyes respond to wavelengths ranging from 400nm to 700nm. This...
Answer: 1) 1mm to 10m 2) 0.7 μm to 1mm 3) 0.1 m to 1mm 4) 0.1 μm to 0.7 μm Answer: 3) 0.1 m to 1mm Solution: In the microwave oven, we use electromagnetic oscillators which produce...
Answer: 1) 6.48 x 105 N 2) 3.60 x 102 N 3) 1.2 x 10-6 N 4) 2.16 x 10-3 N Answer: 3) 1.2 x 10-6 N Solution: The average force by light on the surface is given by  Fav...
Answer: 1) 1/20 A 2) 20 A 3) 100 A 4) 2 A Answer: 2) 20 A Solution: Number of turns in the primary winding, Np= 1000 turns Number of turns in the secondary winding, Ns= 50 turns Current in...
Answer: 1) magnetic effect of the electrical current 2) mutual induction 3) electrical inertia 4) self-induction Answer: 2) mutual induction Solution: Mutual inductance is the main operating...
Answer: 1) flux leakage 2) output power 3) hysteresis 4) copper loss 5) eddy current Answer: 5) eddy current Solution: Eddy currents are loops of electrical current induced within conductors...
Answer: 1) series 2) shunt-wound 3) mixed wound 4) Any of the above Answer: 3) mixed wound Solution: The DC generator must be mixed wound to withstand the load variation...
Answer: 1) electric field 2) eddy current 3) magnetic field 4) gravitational field Answer: 2) eddy current Solution: Eddy current has application in induction furnaces. Joule’s heat...
Answer: 1) 25 A 2) 100 A 3) 50 A 4) 20 A Answer:3) 50 A Solution: in an ideal transformer, ⇒ Ip = (25/1) x 2 = 50 A...
Answer: 1) v = 1/√μrK 2) v = c √μrK 3) v = c/√μrK 4) v = k √μrc Answer: v = c √μrK Solution: Speed of light in vacuum, c =...
Answer: 1) radiowaves and microwaves 2) ultraviolet rays and infrared rays 3) ultraviolet rays and x rays 4) infrared rays and microwaves Answer: 2) ultraviolet rays and infrared rays Solution:...
Answer: 1) P = 0, E ≠ 0 2) P ≠ 0, E = 0 3) P ≠ 0, E ≠ 0 4) P = 0, E = 0 Answer: 3) P ≠ 0, E ≠ 0 Solution: When a plane...
Answer: 1) Radio waves 2) Infrared radiations 3) x rays 4) visible rays Answer: Radio waves Solution: Radio waves have the longest wavelength...
Answer: 1) √IrK 2) √IrE0 3) √I0E0 4) 1/√IrK Answer: 1) √IrK Solution: Refractive index, n = c/v  = √IrK...
Answer: 1) for all wavelengths 2) in all media 3) for all intensities 4) for all frequencies Answer: 3) for all intensities Solution: c = νλ Therefore, the speed of light will...
Answer: 1) 3 x 10-8 2) 3 x 10-6 3) 27 x 10-6 4) 27 x 1010 Answer: 2) 3 x 10-6 Solution: The maximum value of the magnetic field, B0 = E0/c = 900/(3 x 108) = 3 x 10-6 T...
Answer: 1) 2 x 10-8 T 2) (1/2) x 10-8 T 3) 2 T 4) (1/2) T Answer: 1) 2 x 10-8 T Solution: The magnetic field, B = E/c = 6/(3 x 108) = 2 x 10-8 T...
Answer: 1) γ – rays 2) Visible light 3) Radio waves 4) Ultraviolet rays Answer:4) Ultraviolet rays Solution: Ultraviolet radiation is absorbed by the ozone present in the atmosphere...
Answer: 1) radio waves 2) infrared waves 3) microwaves 4) γ – rays Answer: 1) radio waves Solution: The frequency 1057 MHz of radiation arising from two close energy levels in...
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