In a common-base amplifier, the phase difference between the input signal voltage and output voltage is
In an experiment to measure the internal resistance of a cell, by a potentiometer, it is found that the balance point is at a length of 2 m, when the cell is shunted by a 5 Ω resistance and is at a length of 3m when the cell is shunted by a 10 Ω resistance. The internal resistance of the cell is
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The capacities of three capacitors are in ratio 1 : 2 : 3. Their equivalent capacity when connected in parallel is 60/11 μ F more than that when they are connected in series. The individual capacities of capacitors in μ F are
The standard Gibbs free energy change and enthalpy change at 25oC for the liquid phase reaction
are given as ΔG0298 = -4650 J/mol and ΔH0298 = -3640 J/mol. If the solution is ideal and enthalpy change is assumed to be constant, then the equilibrium constant at 95oC is
Sodium nitroprusside reacts with sulphide ion to give a purple colour due to the formation of :
If in a Δ A B C , 3 a = b + c then tanB/2 .tan C/2 is equal to
If the two roots of the equation x3-3x+2=0 are equal, roots are
If x = a (θ + sinθ), y = a(1 - cosθ), then at θ = π/2, the length of the normal is
If A and B are two mutually exclusive events such that P(B) = 2P(A) and A ∪ B = S. Then P(A) is equal to
A card is taken out of a pack of 52 cards numbered 2 to 53. The probability that the number on the card is a prime number less than 20 is
If the roots of 4x3 − 12x2 + 11 x + k = 0 are in A.P. then k =
If the function f is defined by f(x) = x/1 + | x | then at what points is f differentiable
In how many ways can 4 boys and 3 girls be seated in a row of 7 chairs if the boys and girls alternate?
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