# Analog Circuits [GATE (Graduate Aptitude Test in Engineering) Electronics]: Questions 69 - 72 of 249

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## Question 69

Analog Circuits
Biasing, Bias Stability

Appeared in Year: 2000

### Question

MCQ▾

The current gain of a bipolar transistor drops at high frequencies because of

### Choices

Choice (4)Response

a.

The early effect

b.

Transistor capacitances

c.

High current effects in the base

d.

Parasitic inductance effects

## Question 70

Analog Circuits
Biasing, Bias Stability

Appeared in Year: 1999

### Question

MCQ▾

An NPN transistor (with C = 0.3 pF) has a unity gain Cutoff frequency of 400 MHz at a dc bias current The value of its is approximately

### Choices

Choice (4)Response

a.

30

b.

96

c.

50

d.

15

## Question 71

Analog Circuits
Simple Op-Amp Circuits

Appeared in Year: 2006

### Question

MCQ▾

For the circuit shown in the following figure, the capacitor C is initially uncharged. At the switch S is closed. The across the capacitor at millisecond is In the figure shown above, the OP-AMP is supplied with

### Choices

Choice (4)Response

a.

0 Volt

b.

9.45 Volts

c.

10 Volts

d.

6.3 Volt

## Question 72

Analog Circuits
Clipping, Clamping and Rectifiers

Appeared in Year: 2004

### Question

MCQ▾

In a full-wave rectifier using two ideal diode, and are the dc and peak values of the voltage respectively across a resistive load. If PIV is the peak inverse voltage of the diode, then the appropriate relationships for this rectifier are

### Choices

Choice (4)Response

a.

b.

c.

d.

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