Related Questions

The range of electromagnetic spectrum important in heat transfer by radiation is __________ microns.
A 0.38-0.78
B 0.5-50
C 100-1000
D 5-50
The entire range of the electromagnetic spectrum spans a large spectrum of wave lengths varying from:
A 10-10 to 106 m
B 10-8 to 106 m
C 10-10 to 1010 m
D 10-8 to 108 m
Particle size range in which dust catcher (gravity settling chamber) works most effectively and efficiently is __________ microns.
A [

A.

B. 10 to 25

B > 1000
Brownian movement is prominent in the particle size range of __________ microns in case of settling of a particle in a fluid.
A 2 to 3
B 0.01 to 0.10
C 200 to 300
D 100 to 1000
Alphatron measures pressure __________ microns.
A [

A.

B.

B > 3
In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie ?
A Visible
B Infrared
C Ultraviolet
D X-ray
তড়িৎচুম্বকীয় বর্ণালিতে (electromagnetic spectrum) নিচের কোনটির তরঙ্গদৈর্ঘ্য সবচেয়ে বেশি?
A UV-ray
B X-ray
C TV-waves
D Infrared ray
Electromagnetic spectrum contains:
A Gamma rays (wave length -10 m)
B Ultraviolet rays (wave length -6 m)
C Infrared rays (wave length -4 m)
D All of these
How many microns are there in a metre?
A 1000
B 10000
C 1000000
D 100000
If A varies directly proportional to C and B also varies directly proportional to C, which one of the following is not correct ?
A $$\left( {A + B} \right)\alpha \,C$$
B $$\left( {A - B} \right)\alpha \,\frac{1}{C}$$
C $$\sqrt {AB} \,\alpha \,C$$
D $$\frac{A}{B} = {\text{constant}}$$

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