KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics: Questions 51 - 52 of 268

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Question number: 51

» Rotational Motion » Moment of Inertia

Appeared in Year: 2012

MCQ▾

Question

Seven identical coins are rigidly arranged on a flat table in the pattern shown below so that each coin touches its neighbors. Each coin is a thin disc of mass m and radius r. Note that the moment of inertia of an individual coin about an axis passing through center and perpendicular to the plane of the coin is.

Arrangement of seven identical coins

Arrangement of Seven Identical Coins

In figure seven identical coins are rigidly arranged on a flat table in the pattern such that each coin touches its neighbors.

The moment of inertia of the system of seven coins about an axis that passes through the point P (the centre of the coin positioned directly to the right of the central coin) and perpendicular to the plane of the coins is-

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 52

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

Appeared in Year: 2011

MCQ▾

Question

In the circuit shown, the switch is closed at time t = 0.

Diagram of R-L circuit at time t = 0

Diagram of R-L Circuit at Time T = 0

In figure a resistance, inductor, a switch and a battery of 10 V is connected in a circuit.

Which of the graphs shown below best represents the voltage across the inductor, as seen on an oscilloscope?

Choices

Choice (4) Response

a.

Graph of voltage verses time choice – A

Graph of Voltage Verses Time Choice – A

In figure graph represents the voltage across the inductor, as seen on an oscilloscope?

b.

Graph of voltage verses time choice – B

Graph of Voltage Verses Time Choice – B

In figure graph represents the voltage across the inductor, as seen on an oscilloscope?

c.

Graph of voltage verses time choice – C

Graph of Voltage Verses Time Choice – C

In figure graph represents the voltage across the inductor, as seen on an oscilloscope?

d.

Graph of voltage verses time choice – D

Graph of Voltage Verses Time Choice – D

In figure graph represents the voltage across the inductor, as seen on an oscilloscope?

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