Question

If the colour code of carbon resistor is as follows, then give the value of its resistance in $k \, \Omega$, Colour of I strip-yellow Colour of II strip-blue Colour of III strip-orange Colour of IV strip-gold

• A. $46 \pm 5\%$
• B. $0.46 \pm 5\%$
• C. $46 \pm 10\%$
• D. $0.46 \pm 10\%$

Answer 1

The Correct Option is A

The colour coding of these bands are as follows yellow, blue, orange, and gold.

According to the formula of resistance R = AB x C D%

Here, A and B are the first two colours expressed in Ohms, C is third colour being decimal multiplier and D is the fourth colour in tolerance percentage %.

So, R = (46 x 10³ 5%) Ω = 46 5% kΩ

A fixed resistor that restricts or controls the flow of electric current to a certain level is called a carbon resistor. On the other hand, carbon composition resistors are no longer often used because of their high price and unstable design. Numerous metals and alloys, including as nichrome, brass, platinum, and tungsten, are used to provide the resistance. However, when compared to carbon resistors, most of these metals have low electrical resistance since it is challenging to produce high resistance without making the resistor bulky.

Resistance ∝ [Length ×Resistivity]

It is well known that resistance is exactly proportional to the product of the resistor's length and resistivity.

Within the bounds of practicality, the resistance is replicated using carbon resistors.

Carbon resistors and carbon composition resistors are other names for these devices.

Create resistance values that are incredibly exact.

are employed to compare and calibrate resistances.

Directly printed on circuit boards, inexpensive, and small.