What is the purpose of the anode in a gas discharge tube?

JAMB Physics 2024 83 views

What is the purpose of the anode in a gas discharge tube?

  1. To emit photons
  2. To absorb electrons ✓
  3. To emit sound waves
  4. To release heat

Explanation

Percentage means “per hundred.” 25% = 25/100 = 0.25. To find percentage: (part/whole) × 100. To find percentage of a number: percentage × number = result. 20% of 80 = 0.20 × 80 = 16.

Percentage increase: ((new – old)/old) × 100. Price rises from ₦50 to ₦65: ((65-50)/50) × 100 = 30% increase. Percentage decrease calculated similarly but result is negative.

Profit/loss calculations: Profit % = (profit/cost price) × 100. If bought at ₦200, sold at ₦250: profit = ₦50, profit % = (50/200) × 100 = 25%. Discount removes percentage from original price.

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