Maths-
General
Easy
Question
With the usual meaning for a, b, c and s if 
be the area of a triangle then the error in resulting from a small error in the measurement of c, is
The correct answer is:
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Consider the situation shown in the figure. The wire AB is sliding on the fixed rails with a constant velocity. If the wire AB is replaced by semicircular wire, the magnitude of the induced current will
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physics-General
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A thin semicircular conducting ring of radius R is falling with its plane vertical in a horizontal magnetic induction B. At the position MNQ, the speed of the ring is V and the potential difference developed across the ring is
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An electron moves along the line AB, which lies in the same plane as a circular loop of conducting wires as shown in the diagram. What will be the direction of current induced if any, in the loop
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In the circuit shown switch k2 is open and switch k1 is closed at t = 0. At time t = to switch k1 is opened and switch k2 is simultaneously closed. The variation of inductor current with time is
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An equilateral triangular loop having a resistance R and length of each side l is placed in a magnetic field which is varying at 
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physics-General
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The area of the triangle formed by tangents drawn from the point (x1, y1) to the parabola y2 = 8x and its chord of contact is
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maths-General
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A uniform but time varying magnetic field is present in a circular region of radius R. The magnetic field is perpendicular and into the plane of the loop and the magnitude of the field is increasing at a constant rate 
.There is a straight conducting rod of length 2R placed as shown in figure .The magnitude of induced emf across the rod is
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In the arrangement shown in the figure, uniform magnetic field B is upward to the plane of paper. Connecter AB is smooth and conducting, having mass m and length l. Initially spring has extension X0. Spring is non-conducting (neglect induction in spring). Connector is released at t = 0. Maximum charge on the capacitor is
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physics-General
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Time constant of L-R circuit will be
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A large number of infinite long thin wires each carrying current i0 are kept along z-axis. Then the value of magnetic field ‘B’, at any point ‘P’ at a distance ‘x’ from O varies as
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Two fixed long conducting wires cross each other perpendicularly so that they do not actually touch but are close to each other as shown in the figure. Equal current i exist in each wire in the directions indicated. In what region(s) will there be some points with zero net magnetic field?
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Period of f (x) = sin x + tan 
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Maths-General
physics-
A container is filled with water
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physics-General
biology
An organism is able to live on a culture medium containing nutrient A, by the enzyme catalysed reactinons 
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DNA fragments separated by gel electrophoresis are shown. Mark the correct statement
DNA fragments separated by gel electrophoresis are shown. Mark the correct statement
biologyGeneral
