Related Questions

A circle has a radius of 30 cm. Determine the length of the arc subtended by an angle of 60∘ at the center of the circle.
A  π6 cm
B 6π cm
C 10π cm
D 20π cm
Depending on the radiating properties, a body will be opaque when
A p = 0, x = 0 and a = 1
B p = 1, x = 0 and a = 0
C p = 0, x = 1 and a = 0
D x = 0, a + p = 1
The ratio of total radiating power to the absorptivity of the body depends upon the __________ as per Kirchoffs law.
A Wavelength of radiation
B Nature of the body
C Temperature of the body
D None of these
As per Kirchoffs law, the ratio of the total radiating power to the absorptivity of a body depends on the
A Temperature of the body only
B Wavelength of monochromatic radiation
C Both A and B
D Nature of material of body
At which temperature would the earth be radiating energy at the greatest rate or intensity?
A -5o F
B -40o F
C 60o F
D 32o F
E 105o F
The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as
A Emissivity
B Transmissivity
C Reflectivity
D Intensity of radiation
If one angle of a triangle is three times a second angle and the third is 20 degrees more than the second angle, the second angle, in degrees, is
A 32
B 36
C 4
D None of these
When the two elements of a pair have a surface contact when relative motion takes place and the surface of one element slides over the surface of the other, the pair formed is known as a
A lower pair
B higher pair
C self-closed pair
D force-closed pair
Identify the sentence in which the word element (s) refers to 'suitable or favourable environment. (1) There is an element of truth in your story. (2) Water is composed of elements of hydrogen and oxygen. (3) I feel out of my elements in political discussions. (4) Water is a natural element for fish
A (4)
B (3)
C (1) and (2)
D (1)
The __________ element must reference either an ‘altGlyphDef’ element or a ‘glyph’ element.
A href
B src
C animate
D altGlyph

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