Related Questions

A Wien bridge oscillator uses ___________ feedback
A Only positive
B Only negative
C Both positive and negative
D None of the above
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 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
C L
D f
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
According to Wien's law, the wavelength corresponding to maximum energy is proportion to
A Absolute temperature (T)
B f
C t
D None of these
Wien’s law states that the wave length corresponding to ________ is proportional to the absolute temperature.
A Minimum energy
B Maximum energy
C Both (A) and (B)
D None of these
A man wishes to cover his floor with tiles, each one measuring 3/4 inch by 2 inches. If his room is rectangular, measuring 12 feet by 18 feet, how many such tiles will he need?
A 144
B 1152
C 1728
D 20736
The water in a fish tank measuring 114 feet by 8 inches is 7 inches high. The water is poured into another tank measuring 14 inches by 20 inches. What will be the height of water, in inches, in the second tank?
A 1/4
B 2
C 3
D 1/12
Which of the following is most useful for measuring the shortest distance between two places on the earth and path between them?
A Atlas map
B Thematic maps
C Wall maps
D Globe

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