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- Question
The NTSC (National Television Standards Committee) is also used in the country of...?
Options- A. Japan
- B. France
- C. Germany
- D. England
- Correct Answer
- Japan
- 1. '.MPG' extension refers usually to what kind of file?
Options- A. WordPerfect Document file
- B. MS Office document
- C. Animation/movie file
- D. Image file Discuss
- 2. What does VVVF stand for?
Options- A. Variant Voltage Vile Frequency
- B. Variable Velocity Variable Fun
- C. Very Very Vicious Frequency
- D. Variable Voltage Variable Frequency Discuss
- 3. '.BAK' extension refers usually to what kind of file?
Options- A. Backup file
- B. Audio file
- C. Animation/movie file
- D. MS Encarta document Discuss
- 4. A given signal's second harmonic is twice the given signal's __________ frequency...?
Options- A. Fourier
- B. Foundation
- C. Fundamental
- D. Field Discuss
- 5. What is the relationship between resistivity r and conductivity s?
Options- A. R = s2
- B. R = s
- C. R > s
- D. R = 1/s Discuss
- 6. 'DB' computer abbreviation usually means?
Options- A. Database
- B. Double Byte
- C. Data Block
- D. Driver Boot Discuss
- 7. "FET" is a type of transistor, Its full name is ________ Effect Transistor...?
Options- A. Field
- B. Factor
- C. Flash
- D. Force Discuss
- 8. In which decade with the first transatlantic radio broadcast occur?
Options- A. 1850s
- B. 1860s
- C. 1870s
- D. 1900s Discuss
- 9. What was the first ARPANET message?
Options- A. "lo"
- B. "hello world"
- C. "mary had a little lamb"
- D. "cyberspace, the final frontier" Discuss
- 10. What does AC and DC stand for in the electrical field?
Options- A. Alternating Current and Direct Current
- B. A Rock Band from Australia
- C. Average Current and Discharged Capacitor
- D. Atlantic City and District of Columbia Discuss
Technology problems
Search Results
Correct Answer: Animation/movie file
Correct Answer: Variable Voltage Variable Frequency
Explanation:
It is a method of controlling the speed of an AC induction motor, whereby speed, current and torque can all be accurately controlled.
Correct Answer: Backup file
Correct Answer: Fundamental
Explanation:
A given signal's second harmonic is twice the given signal's fundamental frequency. Harmonics are generated when there are non-linearities in an amplifier (there are always non-linearities). The worse the non-linearities, the more harmonics. A signal at 27.5 MHz (approximate frequency for US citizen's band) would have a second harmonic at 55.0 MHz (on US channel 2!). Can you see why there might be problems? A CB operator might do well to place a low-pass filter on his radio.
Correct Answer: R = 1/s
Correct Answer: Database
Correct Answer: Field
Explanation:
The terminals of FETs are called gate, drain and source. You might be more familiar with bipolar junction transistors (BJTs), which have terminals called base, collector and emitter. FETs were conceptualized first, but BJTs were easier to produce and so developed sooner.
Correct Answer: 1900s
Explanation:
On December 12, 1901, a radio transmission received by Guglielmo Marconi resulted in the first transmission of a transatlantic wireless signal (Morse Code) from Poldhu, Cornwall, to St. John's, Newfoundland.
Correct Answer: "lo"
Correct Answer: Alternating Current and Direct Current
Explanation:
Electricity is voltage and current. Voltage is electrical pressure, and current is the flow of charged particles. The difference between alternating current (AC) and direct current (DC) is that the electrons in an AC circuit regularly reverse their direction. In a DC circuit electrons always flow in the same direction.
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