GATE (Graduate Aptitude Test in Engineering) Electronics: Questions 248 - 253 of 1076

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Question 248

Appeared in Year: 1998

Question

MCQ▾

The of a BJT is related to its , and as follows.

Choices

Choice (4)Response

a.

b.

c.

d.

Question 249

Appeared in Year: 2002

Question

MCQ▾

The voltage gain of the JFET amplifier shown in the figure is , Volts. Assume , and to be very large.

The JFET Amplifier with the Capacitors and Resistors

Choices

Choice (4)Response

a.

+ 16

b.

+ 8

c.

-16

d.

-6

Passage

A regulated power supply, shown in figure below, has an unregulated input (UR) of 15 Volts and generates a regulated output . Use the component values shown in the figure.

Regulated Power Supply Circuit Consisting Operational Amplifier

Question 250 (1 of 2 Based on Passage)

Appeared in Year: 2006

Question

MCQ▾

If the unregulated voltage increases by 20 % , the power dissipation across the transistor

Choices

Choice (4)Response

a.

Remains unchanged

b.

Decreases by

c.

Increase by

d.

Increase by

Question 251 (2 of 2 Based on Passage)

Appeared in Year: 2006

Question

MCQ▾

The power dissipation across the transistor shown in the figure is

Choices

Choice (4)Response

a.

b.

5.0Watts

c.

5.4Watts

d.

6.9Watts

Question 252

Appeared in Year: 2002

Question

MCQ▾

An amplifier using an OP-AMP with a slew rate has a gain of 40 dB. If this amplifier has to faithfully amplify sinusoidal signals from dc to 20 kHz without any slew rate included distortion, then the input signal level must not exceed

Choices

Choice (4)Response

a.

39.5 mV

b.

795 mV

c.

395 mV

d.

79.5 mV

Question 253

Appeared in Year: 2001

Question

MCQ▾

The inverting OP-AMP shown in the figure has an open loop gain of 100. the closed loop gain is

Inverting Operational Amplifier with Feedback &Input Resistors

Choices

Choice (4)Response

a.

b.

c.

d.

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