KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics: Questions 123 - 125 of 250

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Question number: 123

» Rotational Motion » Moment of Inertia

MCQ▾

Question

A homogeneous sphere of mass M and radius R has moment of inertia I about its diameter. A concentric sphere of radius R3 is carved out from the sphere. What is the moment of inertia of the remaining part about the diameter?

Choices

Choice (4) Response
a.

910I

b.

242243I

c.

94I

d.

8180I

Question number: 124

» Electrostatics » Electric Potential

Appeared in Year: 2013

MCQ▾

Question

The figure below shows a circuit and its input voltage Vi as function of time t.

Circuit diagram and its input voltage as function of time

Circuit Diagram and Its Input Voltage as Function of Time

In figure Circuit diagram consist of two diodes and two batteries of 1 V and 3 V and a resistor. Also input voltage as function of time t is shown in figure.

Assuming the diodes to be ideal, which of the following graphs depicts the output voltage V0 as function of time t?

Choices

Choice (4) Response
a.
 Graph of output potential verses time - Choice - A

Graph of Output Potential Verses Time - Choice - A

In figure graph of output voltage verses time is shown.

b.
Graph of output potential verses time - Choice - B

Graph of Output Potential Verses Time - Choice - B

In figure graph of output voltage verses time is shown.

c.
Graph of output potential verses time - Choice - C

Graph of Output Potential Verses Time - Choice - C

In figure graph of output voltage verses time is shown.

d.
Graph of output potential verses time - Choice - D

Graph of Output Potential Verses Time - Choice - D

In figure graph of output voltage verses time is shown.

Question number: 125

» Current Electricity » V-I Characteristics of Ohmic and Non-Ohmic Conductors

Appeared in Year: 2015

MCQ▾

Question

For a diode connected in parallel with a resistor, which is the most likely current (I) – voltage (V) characteristic?

 Circuit diagram consist of a diode and a resistor

Circuit Diagram Consist of a Diode and a Resistor

In figure circuit diagram is shown, in which; a resistor connected in parallel to a diode.

Choices

Choice (4) Response
a.
Current (I) vs Voltage (V) characteristic (Choice A)

Current (I) vs Voltage (V) Characteristic (Choice A)

In figure current (I) vs Voltage (V) characteristic of given figure is shown.

b.
 Current (I) vs Voltage (V) characteristic (Choice B)

Current (I) vs Voltage (V) Characteristic (Choice B)

In figure current (I) vs Voltage (V) characteristic of given figure is shown.

c.
 Current (I) vs Voltage (V) characteristic (Choice C)

Current (I) vs Voltage (V) Characteristic (Choice C)

In figure current (I) vs Voltage (V) characteristic of given figure is shown.

d.
Current (I) vs Voltage (V) characteristic (Choice D)

Current (I) vs Voltage (V) Characteristic (Choice D)

In figure current (I) vs Voltage (V) characteristic of given figure is shown.

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