Apply Online for All India Pre-Medical/Pre-Dental Entrance Test (AIPMT) 2016

You can now apply for All India Pre-Medical/Pre-Dental Entrance Test (AIPMT) 2016.

Application for AIPMT 2016 can be submitted online only and the last date for submitting the application without late fee is 8^th January 2016, if you pay the fee using e-challan.

Using other modes of payment you can submit the application without late fee up to 12^th January 2016.

The last date for submitting the application with late fee is 6^th February 2016, if you pay the fee using e-challan.

Using other modes of payment you can submit the application with late fee up to 10^th February 2016.

    The Entrance Test which will be conducted from 10 am to 1 pm on 1^st May, 2016 (Sunday) will have one paper with 180 objective type questions from Physics, Chemistry and Biology (Botany & Zoology).

You may visit the AIPMT site at http://aipmt.nic.in for all details.

You can access many old AIPMT questions (with solution) on this site by clicking on the label AIPMT below this post.

Apply for JEE Main 2016

Joint Entrance Examination (Main) – 2016 [JEE Main 2016] will be conducted on April 3, 2016 (Sunday) (Pen & Paper Based Examination) and on April 9, 2016 (Saturday) & April 10, 2016 (Sunday) (Computer Based Examination).

The aspiring candidates have to apply online only through JEE (Main) website www.jeemain.nic.in.

The online application process will start on 1^st December, 2015 and will end on 31^st December, 2015.

You may visit the JEE Main site www.jeemain.nic.in for complete information.

Digital Circuits - Two Questions on Logic Gates

“God used beautiful mathematics in creating the world.”

– P. A. M. Dirac

All India Pre-Medical/Pre-Dental Entrance Test (AIPMT) held on 3^rd May, 2015 has been cancelled by the Supreme Court. A fresh test will be conducted by the Central Board of Secondary Examination (CBSE), in accordance with the Supreme Court Judgment of June 15.

            Today we shall discuss two questions on digital circuits. The first question appeared in the test paper of the cancelled AIPMT 2015. The second question is a variation of the first question. Both are single correct answer type multiple choice questions. Here are the questions:

(i) Which logic gate is represented by the following combination of logic gates?

(1) NAND

(2) AND

(3) NOR

(4) OR

Note that A and B are the inputs applied to two inverters (NOT gates) and Y₁ and Y₂ are their outputs.which are applied to the input side of a two input NOR gate. Y is the final output of the combination. You can easily solve this question by writing the truth table which is given below:

A    B     Y

0     0    0

0     1    0

1     0    0

1     1     1

The combination evidently implements AND operation. So the correct option is (2).

(ii) Which logic gate is represented by the following combination of logic gates?

(1) AND

(2) NAND

(3) NOR

(4) OR

As in question (i) A and B are the inputs applied to two inverters (NOT gates). Y₁ and Y₂ are their outputs which are applied to the input side of a two input NAND gate. The truth table for the combination is given below:

A     B     Y

0     0     0

0      1     1

1      0     1

1      1     1

The combination evidently implements OR operation. So the correct option is (4).