Q1. A Current of 0.5 A is drawn by a filament of an electric bulb
for 10 minutes. Find the amount of electric charge that flows
through the electric circuit.
Q2. How much current will an electric heater draw from a 220V
source, if the resistance of a heater coil is 100?
Q3.Calculate the resistance of 1km long copper wire of radius
1mm. Resistivity of copper is 1.72 x 10-40m.
Q4.Two copper wires A and B of length 30m and 10m have radii
2cm and 1 cm respectively. Compare the resistance of the two
wires. Which will have less resistance?
Q5. When two resistors of resistance R1 & R2 are connected in
parallel, the net resistance is 30. When connected in series its
value is 1612. Calculate value of R1 & R2.
Q6. Calculate the equivalent resistance of the network across
the point A and B as shown in the given fig.
Q7. Three resistors of 60,30 and 20 are connected together so
that the total resistance is greater than 60 but less than 80.
Answers
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Answer:
Q.1 I=Q/T
0.5=Q/10*60
Q=0.5*600
Q=300
so amount of electric charge is 300C
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