Class 10 · Science
Q1.A conductor has resistance that changes with temperature. What does this indicate about resistivity?
Q2.A current of 4 A flows through a wire for 2 minutes. The potential difference across it is 12 V. How much energy is dissipated?
Q3.In a circuit, a 6 V battery (no internal resistance) is connected to R1 = 3 Ω, R2 = 6 Ω in parallel, and this is in series with R3 = 1 Ω. What fraction of total power is dissipated in R3?
Q4.An electric room heater uses 20 A at 110 V and another uses 10 A at 220 V. Which produces more heat per second?
Q5.Two wires A and B of same material have lengths in ratio 1:2 and diameters in ratio 2:1. If both are connected to the same voltage, what is the ratio of heat generated per second (A:B)?
Q6.This is a sample question to preview what you'll get in the full practice test...
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