PHYSICS 10 SCIENCE · 2026–27 · From the chapter · exam-style questions · p. 117–118

Practice question from chapter text

Read the four-band code brown–black–red–gold.

چار رنگ بھورا، سیاہ، سرخ، سنہری مزاحمت کی قدر پڑھیں۔

Solution & explanation

Four-band resistor: brown black red gold gives one kiloohm with five percent toleranceBrown 1 · Black 0 · Red ×100 · Gold ±5%10 × 100 Ω = 1 kΩ ±5%
Schematic · not to scale

First two bands give digits 1 and 0, forming 10. Red multiplies by 10², so R = 10 × 100 = 1000 Ω = 1 kΩ. Gold is ±5%: 950–1050 Ω. Determine reading direction from band spacing and the tolerance band.

Independent study material · English-medium textbook p. 117–118 · Original book ↗