Laser light is considered to be coherant because it consists of
Options
(a) many wavelengths (b) uncoordinated wavelength (c) coordinated waves of exactly the same wavelength (d) divergent beams
Correct Answer:
coordinated waves […]
The moment of inertia of a semicircular ring about the centre is
Options
(a) MR² (b) MR² / 2 (c) MR² / 4 (d) None of these
Correct Answer:
MR²
Explanation:
No explanation […]
In a uniform circular motion, work done in one complete rotation is
Options
(a) finite and positive (b) zero (c) infinite (d) finite and negative
Correct Answer:
zero
Explanation:
No explanation available. Be […]
Which component of electromagnetic spectrum have maximum wavelength?
Options
(a) Radio waves (b) Visible Spectrum (c) Gamma rays (d) X- rays
Correct Answer:
Radio waves
Explanation:
No explanation available. Be the first to […]
Ratio of the radii of the nuclei with mass numbers 8 and 27 would be
Options
(a) 27 / 8 (b) 8 / 27 (c) 2 / 3 (d) 3 / 2
Correct […]
If (range)² is 48 times (maximum height)², then angle of projection is
Options
(a) 45° (b) 60° (c) 75° (d) 30°
Correct Answer:
30°
Explanation:
No explanation available. Be the first to write […]
What is the amount of energy released by deuterium and tritium fusion?
Options
(a) 60.6 eV (b) 12.6 eV (c) 17.6 eV (d) 28.3 eV
Correct Answer:
17.6 eV
Explanation:
No explanation available. […]
All components of the electromagnetic spectrum in vacuum have the same
Options
(a) Energy (b) Velocity (c) Wavelength (d) Frequency
Correct Answer:
Velocity
Explanation:
No explanation available. Be the first to write the […]
In a pure capacitive A.C circuit, current and voltage differ in phase by
Options
(a) 0° (b) 45° (c) 90° (d) 180°
Correct Answer:
90°
Explanation:
No explanation available. Be the first to […]
If the unit of force and length are doubled, then unit of energy will be
Options
(a) same (b) 2 times (c) 4 times (d) 8 times
Correct Answer:
4 times
Explanation:
No […]
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