Electrostatics (KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics): Questions 6 - 7 of 13

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Question number: 6

» Electrostatics » Equipotential Surfaces

Appeared in Year: 2012

MCQ▾

Question

Consider three concentric metallic spheres A, B and C of radii a, b, c respectively where a<b<c . A and B are connected whereas C is grounded. The potential of the middle sphere B is raised to V then the charge on the sphere C is –

Choices

Choice (4) Response
a.

zero

b.

+4πε0Vbccb

c.

4πε0Vbccb

d.

4πε0Vacca

Question number: 7

» 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.

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