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General
Easy
Question
Figure I given below shows a glass vessel, partially filled with water. A narrow beam of light is incident vertically down into the water and passes straight through. Figure II shows the vessel glass tilted until the angle 
, such that the light is refracted along the lower surface of the glass. If refractive indices of air, water and glass are 1, 4/3 and 1.5 respectively then
The correct answer is:
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An infinitely long rectangular strip is placed on the principal axis of a concave mirror as shown in the figure. One end of the strip coincides with centre of curvature as shown. The height of rectangular strip is very small in comparison to focal length of the mirror. Then the shape of image of strip formed by concave mirror is
An infinitely long rectangular strip is placed on the principal axis of a concave mirror as shown in the figure. One end of the strip coincides with centre of curvature as shown. The height of rectangular strip is very small in comparison to focal length of the mirror. Then the shape of image of strip formed by concave mirror is
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If four resistances are connected as shown in the fig between A and B the effective resistance is
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In the circuit shown, the reading of the voltmeter and the ammeter are
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Current ‘i’ coming from the battery and ammeter reading are
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Six resistances of each 12 ohm are connected as shown in the fig The effective resistance between the terminals A and B is
Six resistances of each 12 ohm are connected as shown in the fig The effective resistance between the terminals A and B is
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A wire is bent in the form of a circular arc with a straight portion AB. If the current in the wire is i, then the magnetic induction at O is
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The magnetic induction at O due to a current in conductor shaped as shown in fig. is
The magnetic induction at O due to a current in conductor shaped as shown in fig. is
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