Question

The sequence of bands marked on a carbon resistors are : yellow , red , orange , silver. Write the value of resistance with tolerance.

Answer 1

Answer:

42 * 10^3 +_ 10% is the resistance

Answer 2

Given: Carbon Resistor band sequence - yellow, red, orange, silver.

To Find: the value of Resistance with Tolerance

Solution:

Concept:

Resistors use Resistor color banding, i.e. the use of colored bands to determine the Resistance value and tolerance value.

The color band sequence of a resistor is printed on its packet and can be identified.

Standard resistor values and their color bands are given as follows:-

Color            Digit             Multiplier            Tolerance (%)

Black              0                      10⁰(1)                    

Brown             1                      10¹                            1

Red                 2                     10²                            2

Orange           3                      10³

Yellow             4                      10⁴

Green              5                      10⁵                           0.5

Blue                 6                      10⁶                           0.25

Violet               7                      10⁷                            0.1

Grey                 8                      10⁸                            

White                9                      10⁹                            

Gold                                          10⁻¹                             5

Silver                                         10⁻²                             10

There can be a 4-color band or 5-color band sequence.

According to the question, this is a 4 color band sequence and the information that it provides about the Resistor is as follows:-

• $1^{st}$ and $2^{nd}$ color bands represent the significant digits.
• $3^{rd}$ band represents the multiplier,
• and $4^{th}$ band represents the Tolerance
• ∴ Value of Resistance is given as = _, _, × _ ±  _  ⇒ blanks are according to the given color band sequence on the resistor.
• Hence, $1^{st}$ digit = 4 (yellow)

            $2^{nd}$ digit = 2 (red)

          Multiplier = 10³

         Tolerance = 10%

Value of Resistance with Tolerance = 42 × 10³Ω ± 10%