Physics-
General
Easy
Question
A linear object is placed along the axis of a mirror as shown in fig If ‘f’ is the focal length of the mirror then the length of image is
- f
The correct answer is:
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Two plane mirrors A and B are aligned parallel to each other, as shown in the figure A light ray is incident at an angle 30° at a point just inside one end of A The plane of incidence coincides with the plane of the figure The maximum number of times the ray undergoes reflections (including the first one) before it emerges out is
Two plane mirrors A and B are aligned parallel to each other, as shown in the figure A light ray is incident at an angle 30° at a point just inside one end of A The plane of incidence coincides with the plane of the figure The maximum number of times the ray undergoes reflections (including the first one) before it emerges out is
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A point source of light B, placed at a distance L in front of the centre of a plane mirror of width d, hangs vertically on a wall A man walks in front of the mirror along a line parallel to the mirror at a distance 2 L from it as shown The greatest distance over which he can see the image of the light source in the mirror is
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Following figure shows the multiple reflections of a light ray along a glass corridor where the walls are either parallel or perpendicular to one another If the angle of incidence at point P is 30°, what are the angles of reflection of the light ray at points Q, R, S and T respectively
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The graph shows variation of v with change in u for a mirror Points plotted above the point P on the curve are for values of v
The graph shows variation of v with change in u for a mirror Points plotted above the point P on the curve are for values of v
physics-General
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A linear object is placed along the axis of a mirror as shown in figure If ‘f’ is the focal length of the mirror then the length of image is
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A plane mirror of length 8 cm is moving with speed 3 m/s towards a wall in situation as shown in figure.A source of light S gives narrow and parallel light on to the mirror, then the speed of light spot formed on the wall is.
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A projectile 
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A current carrying loop is placed in the nonuniform magnetic field whose variation in space is shown in figure Direction of magnetic field is into the plane of paper the magnetic force experienced by the loop is
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A particle of charge +q and mass m moving under the influnce of a uniform electric field 
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A particle of charge +q and mass m moving under the influnce of a uniform electric field and a uniform magnetic field follows trajectory from P to Q as shown in figure The velocities at P and Q and respectively Which of the following statement(s) is/are correct
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The products formed in the following reaction, 
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The products formed in the following reaction, are:
chemistry-General
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A man 80 kg is supported by two cables as shown in the figure. Then the ratio of tensions 
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A man 80 kg is supported by two cables as shown in the figure. Then the ratio of tensions and is
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