For a given velocity, a projectile has the same range R for two angles of projection. If t1 and t2 are the times of flight in the two cases, then:
The number of turns and the radius of cross-section of the coil of a tangent galvanometer are doubled. The value of the reduction factor k will be
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A square wire of each side L carries a current i. What is the magnetic field at the mid-point of the square?
The length of a wire of a potentiometer is 100 cm and the emf of its stand and cell is E volt. It is employed to measure the emf of a battery whose internal resistance is 0.5 W. If the balance point is obtained at l = 30 cm from the positive end, then the emf of the battery is
If the internal resistance of the battery is negligible and the capacitance C = 0.5, then what is the steady state current in the 2 resistor shown in the figure below?
Directions: The question below is based on the following passage:
Two light springs of force constants k1 = 1.8 Nm-1 and k2 = 3.2 Nm-1 and a block of mass m = 200 g are arranged on a horizontal frictionless table as shown in the figure. One end of each spring is fixed on rigid supports and the other end is free. The distance CD between the free ends of the springs is 60 cm and the block moves with a velocity 'v' = 120 cms-1 between the springs.
When the block moves towards the spring k2, the time taken by it to move from D up to the maximum compression of spring k2 is (in seconds)
A coil having N turns is wound tightly in the form of a spiral, with inner and outer radii a and b, respectively. When a current I passes through the coil, the magnetic field at the centre is
A non-planar loop of conducting wire carrying a current I is placed as shown in the figure. Each of the straight sections of the loop is of length 2a. The magnetic field due to this loop at the point P (a, 0, a) points in the direction
The de-Broglie wavelength of the electron in the ground state of hydrogen atom is
(KE = 13.6 eV and 1 eV = 1.602 x 10-19 J)
The following equilibria are given:
a. N2 + 3H2 2NH3; K1
b. N2 + O2 2NO; K2
c. H2 + O2 H2O; K3
The equilibrium constant for the reaction,
2NH3 + O2 2NO + 3H2O in terms of K1, K2 and K3 will be
Directions: A phrase is followed by four alternatives. Pick the one which best describes the phrase.
Capable of being approached
Which of the following images (a), (b), (c) and (d) forms the mirror image of figure (X)? (Mirror is placed on the right side of the image)
Directions: There is some relationship between the two terms to the left of the sign (: :). The same relationship exists between the two terms to its right, out of which one is missing. Find the missing one from the given alternatives.
acE : bdF : : fhJ : ?
Directions: The question presents a sentence, all or part of which is underlined. Beneath the sentence you will find four ways of phrasing the underlined part. The first of these repeats the original; the other three are different. If you think the original is best, choose the first answer; otherwise choose one of the others.
The findings of the enquiry committee, as revealed by the chairman, is very encouraging to people.
The differential equation of all non-vertical lines in a plane is
A GP consists of an even number of terms (all terms being different). If the sum of all the terms is five times the sum of the terms occupying odd places, then the common ratio will be
The equation of the circle which touches the coordinate axes and the line and whose centre lies in the first quadrant is x2 + y2 − 2cx − 2cy + c2 = 0, where c is