A Wien bridge oscillator uses ___________ feedback

In a Wien-bridge oscillator, if the resistances in the positive feedback circuit are decreased, the frequency ___________

A

Remains the same

B

Decreases

C

Increases

D

Insufficient data

Wien bridge is useful for measuring

A

Very high frequency

B

Low frequency

C

Medium frequency

D

High frequency

Wien bridge is used for the measurement of

A

R

B

F

C

L

D

C

Wien bridge is used for the measurement of -

A

R

B

C

L

D

f

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

An oscillator employs ___________ feedback

A

Positive

B

Negative

C

Neither positive nor negative

D

Data insufficient

In Colpitt's oscillator, feedback is obtained ___________

A

By magnetic induction

B

By a tickler coil

C

From the centre of split capacitors

D

None of the above

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

সূর্যপৃষ্ঠ নিঃসৃত সর্বাধিক শক্তির তরঙ্গ দৈর্ঘ্যর মান 4753A ° হলে এর পৃস্টের তাপমাত্রা নির্নয় কর। [wien's ধ্রুবক =2.88×10-3 mk]

A

6059 K

B

6.05×103°C

C

7000K

D

6109K

A Wien bridge oscillator uses ___________ feedback

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