Same chapter3 marksDifficulty: Medium
An appliance of power 1.5 kW is used for 4 hours a day for 30 days. Calculate the energy consumed in kilowatt hours.
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4 marksDifficulty: Hard
A 4 Ω and a 6 Ω resistor are joined in parallel and the combination is joined in series with a 2.6 Ω resistor across a 10 V supply. Calculate the total resistance and the current drawn from the supply.
Original Khojo Papers practice question — not from a past board paper.
Answer
Total resistance 5 Ω and current 2 A
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The parallel pair gives (4 × 6) ÷ (4 + 6) = 2.4 Ω. Adding the 2.6 Ω in series gives 5 Ω, so the current is 10 ÷ 5 = 2 A.
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