technology general knowledge questions

61.

Voltage is sometimes referred to as EMF, or Electromotive…?
A.     Field    B.     Factor
C.     Flash    D.     Force
Answer & Explanation

Answer: Option D

Explanation:

The term EMF, or Electromotive Force, its use now in decline, is attributed to Italian physicist Alessandro Volta (1745-1827). Today we generally use the term “voltage” – can you guess why we call it that?
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62.

What does AM mean?
A.     Angelo marconi
B.     Anno median
C.     Amplitude modulation
D.     Amperes
Answer & Explanation

Answer: Option C

Explanation:

Amplitude modulation was the first type to be used in radio. It works well with HF and morse code.
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63.

‘.BAT’ extension refers usually to what kind of file?
A.     Compressed Archive file
B.     System file
C.     Audio file
D.     Backup file
Answer & Explanation

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.
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64.

What is the term to ask the computer to put information in order numerically or alphabetically?
A.     Crop    B.     Report
C.     Record    D.     Sort
Answer & Explanation

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.
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65.

The input used by an antenna or cable to a TV set uses frequencies called…?
A.     IF    B.     RF
C.     AF    D.     SAP
Answer & Explanation

Answer: Option B

Explanation:

RF is radio frequency. IF is intermediate frequency used inside the TV for processing. AF is audio frequency. SAP is second audio program which may have another language or other soundtrack as an option to the main soundtrack.