Recently Active Disucss Test Question Questions

A heating coil is labeled 100 W, 220 V. The coil is cut into two equal pieces, which are joined in parallel to the same source. The energy now liberated per second is ...

A cart of mass M has a block of mass m in contact with it as shown in figure. The coefficient of friction between the block and the car is μ. What is the minimum acceleration of the car so that that the block m does not fall ...

If the lines (x-3)/1=(y-1)/2=(z-2)/3 and (x-k)/1=(y-5)/2=(z-2)/1 intersect then k is ...

A metal foil of negligible thickness is introduced between the two plates of a capacitor at the centre. The capacitance of capacitor will be ...

The sum of the coefficients of the polynomial (1-x-x2)313 ...

Which of the following sets of quantum numbers represents an impossible arrangement? ...

In a compound A atoms occupy the ccp lattice while B occupies the one third of the tetrahedral voids, the formula of the compound is ...

The centre of the smallest circle containing the circles x2+y2=4 and (x-8)2+y2=16 is ...

what happens to the force of friction when weigt of the body is halved??? ...

A bucket full of hot water is kept in a room and it cools from 75°C to 70°C in T1 minutes, from 70°C to 65°C in T2 minutes, and from 65°C to 60°C in T3 minutes. Then ...

The standard electrode potentials of A2+|A and A2+|A+ are x and y volts respectively. The standard electrode potential of A+|A is ...

A rod resting on two mutually perpendicular walls slides along them.What is the locus of the centre of the rod ? ...

An enantiometrically pure acid is treated with racemic mixture of an alcohol having one chiral carbon. The ester formed will be, ...

for preparation of ammonia for nitrogen and hydrogen, the favorable conditions are(given it is endothermic process) ...

solve the differential equation (2y3+x)dy=ydx ,the curve passes through (0,1) ...

The length of the longest interval in which the function 3sinx-4sin3x is increasing, is ...

lim(x→0) 1-cos(2πx) /x ...

*Image* Two particles A and B each of mass m are attached by a light inextensible string of length 2l. The whole system lies on a smooth horizontal table with B initially at a distance l from A. The particle at end B is proje ...

*Image* Two blocks of mass 3 kg and 6 kg respectively are placed on a smooth horizontal surface. They are connected by a light spring of force constant k=200 N/m. Initially the spring is unstretched. The indicated velocit ...

STATEMENT-I: Br- is better nucleophile than C2H5O- STATEMENT-II: HBr is stronger acid than C2H5OH ...

STATEMENT-I: Conformations cannot be isolated STATEMENT-II: Conformations have very less difference in their energy ...

A metadirecting group ...

Arrange the following in increasing value of pKa (1)HCOOH (2)CH3COOH (3)(CH3)2CCOOH (4)(CH3)3CCOOH ...

The shortest wave length of H atom in lyman series is 'x' , then the maximum wave length in balmer series is ...

q59 is the directrix x=2 ...

What is the correct dimension of Force ...

10 identical cells, each of emf 12V and internal resistance 0.1Ω, are joined in series. Out of these , 3 cells are wrongly connected, i.e., their terminals are connected in reverse of that required for series connection. Let ...

Let S={1,2,3,4,5,6}. Two numbers are chosen without replacement. The probability that the minimum of the two numbers is less than 4 is ...

The total no. of structural isomeric alcohols with formula C3H5OH is ...

Multiple correct answer follows If the circle x2+y2=a2 intersects the hyperbola in four points P(x1,y1), Q(x2,y2), R(x3,y3), S(x4,y4) then ...