Three small identical netural balls are the verstices of an equilateral triangle . The balls are connected to a large charged sphere held above the plane of the plane of the triangle symmerticaly with repect to the balls . The first and the second balls acquire charge `q_(1)` and `q_(2)` respectively . How much is `q_(3)` ?.The connecting wires are thin.
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A bag contains b blue balls and r red balls. If two balls are drawn at random, the probability drawing two red balls is five times the probability of
Correct Answer - A::B Let the number of red and blue balls be r and b, respectively. Then, the probability of drawing two red balls is `p_(1) = (.^(r )C_(2))/(.^(r+b)C_(2)) =...
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The distance between the two lines represented by the sides of an equilateral triangle a right-angled triangle an isosceles triangle none of these
Correct Answer - 1 `9x^(2)-24xy+16y^(2)-12x+16y-12=0` or `(3x-4y+2)(3x-4y-6)=0` Hence , the distance between the lines is `(|6-(-2)|)/(5)=(8)/(5)`.
2 Answers 1 views
The clouds consist of charged particles of water dispersed in air. Some of them are +vely charged, other are -vely charged. When +vely charged clouds
Correct Answer - A `AgNO_(3)("excess")+KI rarr Agl overset(+AgNO_(3) ("remaining"))(rarr)AgI//Ag^(+)`
2 Answers 1 views
A box `B_(1)` contains 1 white ball, 3 red balls, and 2 black balls. An- other box `B_(2)` contains 2 white balls, 3 red balls. A third box `B_(3)` co
Correct Answer - A P (required) = P (all are white) + P (all are red) + P (all are black) `=1/6xx2/9xx3/12+3/6xx3/9xx4/12+2/6xx4/9xx2/12=6/648+36/648+40/648=82/648`
2 Answers 1 views
Three small equally charged identical conducting balls are suspended from identical insulating threads secured at one point. Length (L) of the threads
Correct Answer - (a). `((2)/(3))^((1)/(3))a` (b). `((1)/(9))^((1)/(3))a`
2 Answers 1 views
Three small balls, each of mass 10 g , are suspended from a common point by 1-m silk threads . The balls are identically charged and hung at the corne
Correct Answer - `6 xx 10^(-8)` C
2 Answers 1 views
Find the capacitance of a system consisting of a metal sphere of radius a placed at a large distance from an identical metallic sphere. [Hint: When th
Correct Answer - `2piepsilon_(0)epsilon_(r)a`
2 Answers 1 views
Consider three identical metal spheres ` A, B` and `C`. Sphere `A` carries charge ` + 6q`, sphere `B` carries charge `-3q` and sphere `C` carries no c
Correct Answer - `2.25q`
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One side of an equilateral triangle is 36 cm. The mid-points of its sides are joined to form another triangle. Again another triangle is formed by joi
Correct Answer - `432sqrt3 cm^(2)`
2 Answers 2 views