Coding & Classification Systems Flashcards

A five-band resistor has bands: red, violet, green, black, brown. What is its resistance and tolerance?

Answer: 275 Ω ±1%

Red=2, violet=7, green=5 are the significant digits; black=×1 multiplier; brown=±1% tolerance, giving 275 Ω ±1%.

Which number system is the basis for the IEEE 754 standard used in digital electronics floating-point arithmetic?

Answer: Binary

IEEE 754 defines floating-point representation using binary, specifying sign, exponent, and mantissa fields in binary form.

In the EIA-96 SMD resistor coding system, what does the code '01A' represent?

Answer: 100.0 Ω ×1

In EIA-96, '01' is the code for 100 Ω from the E96 table, and 'A' is the multiplier ×1, giving 100 Ω.

Excess-3 (XS-3) code is derived from BCD by:

Answer: Adding 3 to each BCD digit

Excess-3 code is formed by adding binary 3 (0011) to each BCD digit, making it a self-complementing code.

What does a silver tolerance band on a resistor indicate?

Answer: ±10%

A silver tolerance band indicates ±10% tolerance; gold indicates ±5%, and no band indicates ±20%.

In the Pro Electron European component designation system, the first letter of a transistor type number indicates:

Answer: Semiconductor material

In Pro Electron designations, the first letter denotes the semiconductor material: A = germanium, B = silicon, C = gallium arsenide.

Convert hexadecimal FF to its decimal equivalent.

Answer: 255

FF in hex equals (15 × 16) + 15 = 240 + 15 = 255 in decimal.