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Two long straight wires separated by a distance d is carrying same current I in the same direction . An electron is projected in the direction of current at a distance 'a' right from the right wire . If the instantaneous speed of electron when it is in the plane of wire is V , then the force acting on it is

a) (

_o / 2

) I e V { (1/ d) - (1/ a+d) }

b) (

o / 2

) I e V { (1/ d) + (1/ a+d) }

c) zero

d) none of these

Thank you

If 25 coins , of which exactly 5 are gold and rests silver , are arranged at random in

5 rows each containing equal number of coins .Find the probability that there is at

least one row in which there is no gold coin .

Diksha

The joint equation of plane bisecting the angle between the plane x=0 and z=0 and passing through ( 1, 2, 3 ) is

a) (x+y - 4) (x-y+z)=0

b) (x+y -2 ) ( x+ y + 4) = 0

c) (x+y - 4) (x-z+2) =0

d) (x+z-2)(x-z+4)=0

ya you are right yes .sorry thanks

If the sum of the ordinate and the abscissa of a point p (x,y) is 2n (where x,y are natural numbers )then the probability that P does not lie on the line y=x is

a) n-1 / n+3

b) ²ⁿC_n / 2²ⁿ

c) 2n - 2 / 2n-1

d) 2n+1 / 2n+3

ya you are right , I also got the same

kkk ya you are right , actually I am solving MCQ....I ignored the none of these option .Thanks

yes you are right Aditya but what about the other part of the question

are you sure Richa , the answer should not be rational !

so what are you getting Richa ...I mean the answer ..

kkkkkkkkkkkkkkkkkkkkk sorry , I got it .

but the answer is coming different aditya !!

The shortest distance of a point (1,2,3) from a plane making intercepts 1, 2 and 3 units on x,y,z xis respectively is

a) 2

b) 0

c) 13/12

d) 12/7

dunno the answer but please give me the solution so that we can see whats the correct option ?

But Richa , its 6561 - 730 , not 6562 - 730 ??