Electronics and Experimental Methods-Device Structure (CSIR Physical Sciences): Questions 1 - 2 of 2

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Question number: 1

» Electronics and Experimental Methods » Device Structure

Appeared in Year: 2013

MCQ▾

Question

The conductor in a 0.75 km long two – wire transmission lines are separated by a centre – to – centre distance of 0.2 m. If each conductor has a diameter of 4 cm, then the capacitance of the line is – (June)

Choices

Choice (4) Response

a.

8.85μF

b.

88.5nF

c.

8.85pF

d.

8.85nF

Question number: 2

» Electronics and Experimental Methods » Device Structure

Appeared in Year: 2013

MCQ▾

Question

A sample of Si has electron and hole motilities of 0.13 and 0.05m2Vs respectively at 300K . It is doped with P and Al with doping densities of 1.5×1021m3 and 2.5×1021m3 respectively. The conductivity of the doped Si sample at 300 K is – (Dec– 2013)

Choices

Choice (4) Response

a.

20.8Ω1m1

b.

8Ω1m1

c.

32Ω1m1

d.

51.20Ω1m1

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