There are two phases in Joint Entrance Examination (JEE) i.e., JEE Main and JEE Advanced. JEE Main is conducted by Central Board of Secondary Education (CBSE) while JEE Advanced is conducted by one of the IITs. JEE Main 2018 is the preliminary stage of JEE, which is scheduled to be held on April 8, 2018 in offline mode and JEE Main 2018 computerbased test will be conducted on April 15 and 16, 2018. The students who secure rank among top 224000 students will be eligible to appear for JEE Advanced 2018. Students who qualify both exams will be shortlisted for the admission to engineering courses at IITs, NITs, and CFTIs.
Most of the aspirants preparing for JEE Main and JEE Advanced are fresh candidates which means they are going to appear in the exam right after their board exams.
The other category is of repeaters who are going to take the JEE Main test for the second time to improve their rank. Such candidates would have been preparing for this entrance exam by taking various coaching classes or simply doing selfstudies.
Let us discuss first about the JEE Main, the preliminary test which is scheduled to be held on April 8, 2018. The syllabus of the JEE Main exam is based on the class 11th and class 12th NCERT books which is a favorable factor for the fresher students. But repeaters can also take a lead by revising their whole year’s learning in a proper way.
All the aspirants need to keep a track of their preparedness by practicing more and more questions based on each important topic for JEE Main test.
In this article, we will provide you the 5 most important questions from different topics of all subjects i.e., Physics, Chemistry and Mathematics on daily basis.
Find the important questions from the topic Relations and Functions . Students always get 12 questions from this topic in the examination.
Every day you will get the entirely FRESH 5 Questions for JEE Main.
6^{th} April, 2018: 5 Important Questions of Relations and Functions for JEE Main 2018.
5^{th} April, 2018: 5 Important Questions of Thermodynamics for JEE Main 2018.
4^{th} April, 2018: 5 Important Questions of Complex Numbers for JEE Main 2018.
3^{rd} April, 2018: 5 Important Questions of Electromagnetic Induction for JEE Main 2018.
Q 1. An aluminium ring B faces an electromagnet A. The current / through A can be altered,
Options:
(a) If i increase, A will repel B
(b) If i increase, A will attract B
(c) If i increase, A will repel B
(d) Whether i increase or decrease, B will not experience any force
Ans. Option (a) is correct
Explanation:
If current is passed through solenoid A as shown. Current entering at end A is clockwise. When seen from the side of A, so it develops south polarity at A and north polarity at B. When current / through A increase, it is like north of the magnet approaching the ring B and due to Lenz's law face of ring B facing B develops north polarity and hence there is repulsion between the two.
Q 2. The current in the winding on a torpid is 4.0 A. There are 200 turns and the mean circumferential length is 20 cm. If the inside magnetic field is 2.0 T, the relative permeability is near to
Options:
(a) 1000
(b) 2500
(c) 2000
(d) 4000
Ans. Option (b) is correct
Q 3. A metallic rod of length ‘l’is tied to a string of length ‘2l’ and made to rotate with angular speed on a horizontal table with one of the string fixed. If there is a vertical magnetic field B in the region, the emf induced across the ends of the rod is
Ans. Option (d) is correct
Q 4. A circular loop of radius 0.4 cm lies parallel to a much bigger circular loop of radius 40 cm. The centre of the smaller loop is on the axis of the bigger loop. The distance between their centres is 25 cm. If a current of 4.0 A flows through the bigger loop, then the flux linked with smaller loop is
Q 5. A current carrying infinitely long wire is kept along the diameter of a circular wire loop, without touching it. The correct statement (s) is / (are)
Options:
(a) The emf induced in the loop is zero if the current is constant
(b) The emf induced in the loop is finite if the current is constant
(c) The emf induced in the loop is zero if the current decreases at a steady rate
(d) The emf induced in the loop is finite if the current decreases at a steady rate
Ans. Option (d) is correct
Explanation:
Due to current in the straight wire, net magnetic flux from the circular loop is zero. This is because; magnetic field is inward in half of the circle and outward in the other half of the circle. Therefore, change in current will not cause any change in magnetic flux from the loop. Therefore, induced emf under all condition through the circular loop is zero.
2^{nd} April, 2018: 5 Important Questions of Hybridisation for JEE Main 2018.
30^{th} Mar, 2018: 5 Important Questions of Derivatives for JEE Main 2018.
Students can download the PDF of the important questions from Feb 2 to Mar 29, 2018.
Important Questions 
Link 
Feb 2 to Feb 8, 2018 

Feb 9 to Feb 15, 2018 

Feb 16 to Feb 22, 2018 

Feb 23 to Feb 28, 2018 

March 1 to March 8, 2018 

March 9 to March 15, 2018 

March 16 to March 29, 2018 