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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
The correct answer 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 
The induced current in the loop will be
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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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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 
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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
physics-
Time constant of L-R circuit will be
Time constant of L-R circuit will be
physics-General
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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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physics-General
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Period of f (x) = sin x + tan 
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is -
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Maths-General
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A container is filled with water
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biology
An organism is able to live on a culture medium containing nutrient A, by the enzyme catalysed reactinons 
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biologyGeneral
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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
biology
The basic procendure involved in the sythesis of recombinant DNA molecule is depicted. The mistake in the procedure is
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biologyGeneral
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Which of the following in not produced by E.Coil in the lactose
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An object is placed in front of a convex mirror of focal length 
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The Ti plasmid, is often used for making transgenic plants. This plasmid is found in
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biologyGeneral
