Raising input impedance of pre amplifier reduces

The shorter wave length of the electron permits the detailed examination of tiny objects due to reduction of __________ effects

A. Reflection

B. Diffraction

C. Refraction

D. Polarization

Pick the correct statement regarding functions of a transducer
S1: Sense the magnitude, change in & / or frequency of same measurand
S2: To provide electrical output that furnishes accurate, quantitative data about the measurand

A. S1 is true & S2 is false

B. S2 is true & S1 is false

C. Both S1 & S2 are true

D. Both S1 & S2 are false

S1: In multimode fiber optics, intensity modulating schemes can be employed.
S2: Schemes using polarizing techniques need birefringent fiber.

A. S1 is true and S2 is false

B. Both S1 and S2 are true

C. S1 is false and S2 is true

D. Both S1 and S2 are false

Common mode rejection ratio is defined as ratio of

A. Common mode gain to differential mode gain

B. Differential mode gain to common mode gain

C. Common mode gain at input to differential mode gain at input

D. Common mode gain at output to differential mode gain at output