Electronics and Experimental Methods (CSIR Physical Sciences): Questions 12 - 13 of 41

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Question number: 12

» Electronics and Experimental Methods » Frequency Dependence

Appeared in Year: 2014

MCQ▾

Question

An RC network produces a phase – shift of 300. How many such RC networks should be cascaded together and connected to a Common Emitter amplifier so that the final circuit behaves as an oscillator? (June)

Choices

Choice (4) Response

a.

12

b.

9

c.

6

d.

3

Question number: 13

» Electronics and Experimental Methods » Device Characteristics

Appeared in Year: 2014

MCQ▾

Question

A current ip flows through the primary coil of a transformer. The graph of ip(t) as a function of time t is shown in the figure below.

The graph of current in primary coil as a function of time

The Graph of Current in Primary Coil as a Function of Time

In the given figure graph of current in primary coil as a function of time is given.

Which of the following graphs represents the current iS in the secondary coil? (June)

Choices

Choice (4) Response

a.

The current in secondary coil as a function of time: Choice A

The Current in Secondary Coil as a Function of Time: Choice A

In figure graph of the current in secondary coil as a function of time is shown.

b.

The current in secondary coil as a function of time: Choice B

The Current in Secondary Coil as a Function of Time: Choice B

In figure graph of the current in secondary coil as a function of time is shown.

c.

The current in secondary coil as a function of time: Choice C

The Current in Secondary Coil as a Function of Time: Choice C

In figure graph of the current in secondary coil as a function of time is shown.

d.

The current in secondary coil as a function of time: Choice D

The Current in Secondary Coil as a Function of Time: Choice D

In figure graph of the current in secondary coil as a function of time is shown.

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