In an LC transistor oscillator, the active device is ___________

In an LC oscillator, the frequency of oscillator is ___________ L or C.

A

Proportional to square of

B

Directly proportional to

C

Independent of the values of

D

Inversely proportional to square root of

In a radio receiver, we generally use ___________ oscillator as a local oscillator

A

Crystal

B

Wien-bridge

C

Phase-shift

D

Hartley

একটি সরল দোলকের সুতার দৈর্ঘ্য 99 cm এবং এর দোলনকাল 2 sec হলে দোলক পিন্ডের ব্যাসার্ধ নির্ণয় কর। (The length of the string and period of oscillation of a simple oscillator are 99 cm and 2 sec, respectively. Find the radius of the oscillator.)

A

1.29 cm

B

7 mm

C

3.18 mm

D

0.28 cm

E

2.15 mm

In a single stage transistor amplifier, RC and RL represent collector resistance and load resistance respectively. The transistor sees a d.c. load of ___________

A

RC + RL

B

RC || RL

C

RL

D

RC

For faithful amplification by a transistor circuit, the value of VBE should ___________ for a silicon transistor

A

Be zero

B

Be 0.01 V

C

Not fall below 0.7 V

D

Be between 0 V and 0.1 V

The leakage current in a silicon transistor is about ___________ the leakage current in a germanium transistor

A

One hundredth

B

One tenth

C

One thousandth

D

One millionth

For faithful amplification by a transistor circuit, the value of VCE should ___________ for silicon transistor

A

Not fall below 1 V

B

Be zero

C

Be 0.2 V

D

None of the above

The value of collector load RC in a transistor amplifier is ___________ the output impedance of the transistor.

A

The same as

B

Less than

C

More than

D

None of the above

In order to get more voltage gain from a transistor amplifier, the transistor used should have ___________

A

Thin base

B

Thin collector

C

Wide emitter

D

None of the above

Which of the following represents examples of an IT input device, output device and storage device respectively ?

A

bar code reader, CD drive, projector

B

keyboard, monitor, hard disc

C

printer, DVD drive, joystick

D

printer, mouse, monitor

In an LC transistor oscillator, the active device is ___________

Related Questions