KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Physics: Questions 60 - 61 of 253

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Question number: 60

» Kinematics » Position-Time Graphs

Appeared in Year: 2013

MCQ▾

Question

A man inside a freely falling box throws a heavy ball towards a side wall. The ball keeps on bouncing between the opposite walls of the box. We neglect air resistance and friction. Which of the following figures depicts the motion of the centre of mass of the entire system (man, the ball and the box)?

Choices

Choice (4) Response

a.

 Figure represents motion of center of mass (Choice-A)

Figure Represents Motion of Center of Mass (Choice-A)

Figure represents the motion of mass of the system containing man, ball and box.

b.

Figure represents motion of center of mass (Choice-B)

Figure Represents Motion of Center of Mass (Choice-B)

Figure represents the motion of mass of the system containing man, ball and box.

c.

Figure represents motion of center of mass (Choice-C)

Figure Represents Motion of Center of Mass (Choice-C)

Figure represents the motion of mass of the system containing man, ball and box.

d.

Figure represents motion of center of mass (Choice-D)

Figure Represents Motion of Center of Mass (Choice-D)

Figure represents the motion of mass of the system containing man, ball and box.

Question number: 61

» Magnetic Effects of Current and Magnetism » Cyclotron

Appeared in Year: 2013

MCQ▾

Question

An electron enters a chamber in which a uniform magnetic field is present as shown

Electron enters chamber of in uniform magnetic field

Electron Enters Chamber of in Uniform Magnetic Field

In figure direction of the uniform magnetic field in the chamber and direction of the electron enter in the chamber are 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.

Choices

Choice (4) Response

a.

Normal to the plane of the paper and coming out of the plane of the paper

b.

Opposite to the direction of the electron’s motion

c.

Opposite to the direction of the magnetic field

d.

Normal to the plane of the paper and into the plane of the paper

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