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Q.9.A uniform point-source of 100 cd is located at the centre of a simple cubic
cell. What will be total flux directly escaping the cell? Ans. 334.24 lm
Q.10. Solid angle subtended by an ellipsoid having major and minor axes
respectively at any point lying on the major axis at a distance
from the centre is given by
(
) (
)
(
)
Q.11.An ellipsoid with major axis unit & eccentricity
subtends a solid
angle at a point lying on the major axis at a distance unit from the
centre. The value of
Q.12.A sphere with radius R intercepts of total radiation emitted by a
uniform point-source located at a distance from the centre. Then the value
of is equal to
Q.13. Solid angle, subtended by an infinitely long circular cylinder with a radius
14cm at a point lying in the plane of one of the circular-ends at a normal
distance 84cm from the longitudinal axis, is equal to
(
) (
) (
) (
)
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