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qUESTIONS

A concave mirror of focal length f (in air) is immersed in water (mu = 4/3) . The focal length of the mirror in water will be

What should be the angle between two plane mirrors so that whatever be the angle of incidence, the incident ray and the reflected ray from the two mirrors be parallel to each other

A small object is placed 10 cm infront of a plane mirror. If you stand behind the object 30 cm from the mirror and look at its image, the distance focused for your eye will be

A plane mirror produces a magnification of

A man is 180 cm tall and his eyes are 10 m below the top of his head. In order to see his entire height right from toe to head, he uses a plane mirror kept at a distance of 1m from him. The minimum length of the plane mirror required is

A plane mirror reflecting a ray of incident light is rotated through an angle 0 about an axis through the point of incidence in the plane of the mirror perpendicular to the plane of incidence, then

MCQs-PYQs-12th-jee

A beam of well collimated cathode rays travelling with a speed of 5×10−6ms−1 enters a region of mutually perpendicular electric and magnetic fields and emerge undeviated from this region. If |B| = 0.02T , the magnitude of the electric field is

MCQs-PYQs-12th-jee

A proton (or charged particular) moving with velocity ν is acted upon by electric field E and magnetic field B. The proton will move undeflected if

MCQs-PYQs-12th-jee

A strong magnetic field is applied on a stationary electron. Then

MCQs-PYQs-12th-jee

A 2μC charge moving around a circle with a frequency of 6.25×1012Hz produces a magnetic field 6.28T at the centre of the circle. The radius of the circle is

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