Class 11

3. Unit And Measurement question bank (Physics)

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Q1.

The solid angle subtended by the periphery of an area 1 cm² at a point situated symmetrically at a distance of 5 cm from the area is

(A)
\( 2 \times 10^{-2} \) steradian
(B)
\( 4 \times 10^{-2} \) steradian
(C)
\( 6 \times 10^{-2} \) steradian
(D)
\( 8 \times 10^{-2} \) steradian
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Q2.

In which year SI system of units was developed and recommended by General Conference on Weights and Measures?

(A)
1951
(B)
1961
(C)
1971
(D)
1981
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