1 Which of the following is most likely to use a photovoltai

1. Which of the following is most likely to use a photovoltaic cell? A. Bar code reader B. Photographer\'s light exposure meter C. Hand-held television remote control D. Remote floodlight

2. Which of the following light waves has the highest frequency? A. Blue B. Green C. Yellow D. Red

3. Which type of modulation is most affected by transient voltages? A. Pulse width modulation (PWM) B. Pulse amplitude modulation (PAM) C. Pulse code modulation (PCM) D. Pulse position modulation (PPM)

4. The total range of light frequencies (or wavelengths) is called the light A. relationship. B. span. C. index. D. spectrum.

5. The number of components per square area on an integrated circuit is called the A. poundage. B. density. C. specific gravity. D. pile up.

6. To reduce heat concentration engineers designed integrated circuits to operate with only a _______ power supply. A. 1.5 V B. ±15 V C. 2.5 V D. 5 V

7. The human eye is most sensitive to A. blue-yellow. B. red-orange. C. blue-green. D. yellow-green.

8. The binary number system is made up of A. Arabic numbers 0 and 1. B. the letters A and B. C. the symbols + and . D. roman numerals I and II. 9. Remote controls for modern television receivers use A. infrared light. B. laser light. C. UHF electromagnetic waves. D. ultraviolet light.

10. The small dot that\'s often placed on top of the six-pin optoisolator package indicates A. the location of pin #1. B. the location of pin #6. C. that it\'s an optoisolator. D. the location of the signal output pin.

11. Which of the following light waves has the shortest wavelength? A. Blue B. Green C. Red D. Yellow

12. Which of the following is sometimes used as a measure for light waves? A. Microinches B. Milliyards C. Millimeters D. Micrometers

13. Which of the following can be triggered into conduction by a momentary light pulse? A. Darlington transistor B. SCR C. LASCR D. Four-layer diode

14. Which of the following is correct regarding the length of one angstrom (Å)? A. It\'s equal to one tenth of a centimeter B. It\'s equal to 1 × 10 10 meter C. It\'s equal to one tenth of an inch D. It\'s equal to one millionth of a meter

15. Which of the following uses avalanching to provide a higher output current? A. Darlington amplifier B. Encoder C. Photomultiplier D. Phanatron

16. Which of the following is a method of obtaining electron emission from a conductor? A. Electromagnetic emission B. Piezoelectric emission C. Photoemission D. Primary emission 17. A lead is sometimes connected to the base of a phototransistor A. because it\'s a regular transistor that has been converted to a phototransistor. B. to control bandwidth. C. to establish the maximum frequency of operation. D. to control sensitivity. 18. Increasing the range of frequencies used will _______ communication. A. increase the number of signals that can be used for B. decrease the number of signals that can be used for C. not change the number of signals that can be used for D. automatically reduce the fidelity of

19. The wavelength of light is usually measured in A. square centimeters. B. parsecs. C. light days. D. angstroms.

20. Which of the following can be used as the most sensitive heat detector? End of exam A. PIN diode B. Bolometer C. Fuse D. Vacuum tube

Solution

solution to 1-

Remote flood light is most likely to have a photo voltaic cell

solution to 2-

The wavelength and frequency are inversely proportional i.e the colour which has low wavelength has highest frequency.

Of the given colours blue has shortest wavelength hence has highest frequency