Few questions from JEE Main online exam, 9th April 2013
There are some questions from JEE Main online exam that was held on 9th April 2013. These questions are provided by users on 100Marks.
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1. An engine is getting up a hill. It is at 0.9km then the driver sounds a Horn and its echo is heard by him after 5 sec . It the sound travels at a speed 330m/s . Then what is the speed of the engine ?
2. ( 1 / 1 ) + ( 1 / 1+2 ) + ( 1 / 1+2+3 ) ….. upto 10 .. the sum would be
Option A ,. 20 / 11 B,. 18 / 11 C,. 16 / 9 D, 22 / 13
3. If A B C are the sides of a triangle then Determinant a b c , b c a , c a b would be … ( its in the determinant form 3 x 3 matrix ) would be
options 1, Positive 2, Negative 3, Non- Negative 4, Non-Positive
4. Here’s one x^2/4c^2 + y^2/c^2 = 1 is an ellipse and there is a circle x^2 +y^2=9a^2 …. Find the condition in terms of a and c such that they intersect in 4 points..