KVPY Stream-SA (Class 11) Physics: Questions 54 - 55 of 242
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Question number: 54
Appeared in Year: 2013
A tall tank filled with water has an irregular shape as shown. The wall CD makes an angle of 450 with the horizontal; the wall AB is normal to the base BC. The lengths AB and CD are much smaller than the height h of water (figure not to scale).
Let P1, P2 and P3 be the pressures exerted by the water on the wall AB, base BC and the wall CD respectively. Density of water is ρ and g is acceleration due to gravity. Then, approximately,
Question number: 55
An electron enters a chamber in which a uniform magnetic field is present as shown
An electric field of appropriate magnitude is also applied so that the electron travels undeviated without any change in its speed through the chamber. We are ignoring gravity. Then, the direction of the electric field is,
Normal to the plane of the paper and coming out of the plane of the paper
Opposite to the direction of the electron’s motion
Opposite to the direction of the magnetic field
Normal to the plane of the paper and into the plane of the paper