KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics: Questions 24 - 26 of 268

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Question number: 24

» Work, Energy and Power » Work-Energy Theorem

Appeared in Year: 2011

MCQ▾

Question

Two plates each of the mass m are connected by a massless spring as shown.

 Two plates connected by spring

Two Plates Connected by Spring

In figure two plates each of the mass m are connected by a massless spring as shown.

A weight W is put on the upper plate which compresses the spring further. When W is removed, the entire assembly jumps up. The minimum weight W needed for the assembly to jump up when the weight is removed is just more than –

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 25

» Electromagnetic Induction & Alternating Currents » Peak and RMS Value of AC

Appeared in Year: 2011

MCQ▾

Question

For a domestic AC supply of 220 V at 50 cycles per second, the potential difference between the terminals of a two pin electric outlet in a room is given by –

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 26

» Oscillations and Waves » Periodic Motion - Period Frequency

Appeared in Year: 2010

MCQ▾

Question

A bead of mass m is attached to the mid-point of a taut, weightless string of length l and placed on a frictionless horizontal table.

 A bead of mass m is attached to the mid-point of a taut

a Bead of Mass M Is Attached to the Mid-Point of a Taut

In figure a bead of mass m is attached to the mid-point of a taut, weightless string of length l and placed on a frictionless horizontal table.

Under a small transverse displacement x, as shown, if the tension in the string is T, then the frequency of oscillation is –

Choices

Choice (4) Response

a.

b.

c.

d.

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