Class 11

Units, Dimensions and Measurement question bank (Physics)

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Q1.

One second is equal to

(A)
$1650763.73$ time periods of $Kr$ clock
(B)
$652189.63$ time periods of $Kr$ clock
(C)
$1650763.73$ time periods of $Cs$ clock
(D)
$9192631770$ time periods of $Cs$ clock
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Q2.

The unit of potential energy is

(A)
$gm \cdot (cm/sec^2)$
(B)
$gm \cdot (cm/sec)^2$
(C)
$gm \cdot (cm^2/sec)$
(D)
$gm \cdot (cm/sec)$
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