Physics MCQs

Page No. 13

Ratio of the weight of H-atom to that of an electron is approximately______________?


a18.336

✖


b1836

✓


c18360

✖


d183.6

✖


View Answer 1836

Michelson calculated the speed of light using the instruments______________?


a spectrometer

✓


bgalvanometer

✖


cinterferometer

✖


dnone of these

✖


View Answer spectrometer

The equation θ = 1.22 λ/D was devised by_______________?


aNewton

✖


bEinstein

✖


cRaleigh

✓


dPlanks

✖


View Answer Raleigh

A convex lens acts as a diverging lens if the_________________?


aobject is beyond C

✖


bif the object is with in C

✖


cif the object is within f

✖


dboth B and C

✓


View Answer both B and C

Michelson devised the formula to calculate the speed of light_______________?


aC = 4fd

✖


bC = 8fd

✖


cC = 16fd

✓


d C = 5/2fd

✖


View Answer C = 16fd

In optic fiber transmission the repeater are separated through a distance of __________ km in newer system?


a300km

✖


b 200km

✖


c100km

✓


d20km

✖


View Answer 100km

The function of collimeter in spectrometer is________________?


ato produce parallel beams of light

✓


b to filter the light rays

✖


c to make them

✖


dno function

✖



Errors in the transmission of power through optic fiber can be minimized by using a______________?


a Multimode index fiber

✖


bGraded index fiber

✓


cSingle mode step index fiber

✖


dCopper wire

✖


View Answer Graded index fiber

Magnification of the astronomical telescope is_____________?


afo+fe

✖


bfo/fe

✓


cfe/fo

✖


d(1+fo/fe)L/fo

✖


View Answer fo/fe

In optic fiber transmission system _____________ are used regenerate the dim light signal?


aDiodes

✖


b Repeaters

✓


cLaser

✖


dTransformer

✖


View Answer Repeaters

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