AMIE INDIA Students Forum

[shashi118]

Multiple Choice Questions’ Bank:
1. Visible light’s wavelength range ______________.
(a) 0.39 – 0.77 mm (b) 0.39 – 0.77 μm
(c) 0.39 – 0.77 nm (d) 0.39 – 0.77 cm
2. Planck’s constant
(a) 6.62x10-34 J.sec (b) 6.62x10-34 J.min (c) 6.62x10-34 Cal.sec (d) 6.62x10-34 Cal.min
3. Sum of these is unity
(a) Reflectivity (b) Reflectivity + Refractivity
(c) Reflectivity + Refractivity + Transmitivity (d) Any
4. Metals can ________ the light beams.
(a) Reflect (b) Refract (c) Transmit (d) Any
5. Metals are _______.
(a) Transparent (b) Opaque (c) Translucent (d) None
6. Metals can transmit these ____.
(a) Radio ways (b) Visible light (c) Microwaves (d) x-rays
7. Reflectivity of metals
(a) 0.05 (b) 0.50 (c) 0.95 (d) None
8. Refractive index of materials is approximately equal to square root of
(a) electrical permittivity (b) magnetic permeability
(c) electrical permittivity x magnetic permeability (d) None
9. Snell’s law relates ____________.
(a) Light relfection (b) Light refraction (c) Light transmission (d) Light Absorption
10. Bouguer’s law relates ____________.
(a) Light relfection (b) Light refraction (c) Light transmission (d) Light Absorption
11. Sky looks blue because the sun light is subjected to __________.
(a) Rayleigh scattering (b) Compton scattering (c) Both (d) None
12. Luminescence is because of
(a) Photons emitted while excited electrons drops down
(b) Knocking out of electrons by photons
(c) Photons stimulated by photons
(d) All
13. Fluorescence occurs within _______.
(a) 10-5 s. (b) 10-5 ms. (c) 10-5 μs. (d) 10-5ns.
14. Electro-luminescence occurs in _________.
(a) Electrical conductors (b) Electrical insulators (c) p-n junctions (d) all
15. Pyrometer works based on
(a) Laser technology (b) Photo-conduction (c) Thermal emission (c) Tyndall effect
16. Solar cell works based on
(a) Laser technology (b) Photo-conduction (c) Thermal emission (c) Tyndall effect
17. Optical fiber operates on the principle of
(a) Total internal reflectance (b) Tyndall effect (c) Photo-electric effect (d) Laser technology
Answers:
1. b
2. a
3. c
4. a
5. b
6. d
7. c
8. a
9. b
10. d
11. a
12. a
13. b
14. c
15. c
16. b
17. a

[Gauravkr]

Ur questions r good n efficient.
I appreciate for this contribution.
Bt will be more powerfull if they r in PDF format .
Thanx for this contribution