Q. 2. What is the potential difference between the ends of 16Ω resistance, when a current of 1.5A flows through it?

Q. 3. The potential difference across the the terminals of an electric iron is 240V and the current is 6 A what is the resistance of electric iron?

Q. 4. If there are 10

^{8}electrons flowing across any cross section of a wire in 4 minutes, what is the current in the wire?

Q. 5. .A copper wire has diameter o.5mm and resistivity 1.6 x 10

^{-8}ohm m what will be the length of this wire to make the resistance of 10 ohms?

Q. 6. Find the effective resistance of resistors 0.01 ohms and 10

^{7}ohms.in series and parallel

Q. 7. Two resistors of same materials has been connected in series first and then in parallel. Draw a V – I graph to distinguish these connection.

Q. 8. Three resistors 3,4,5 ohms are joined in parallel in a circuit. If a current of 150 mA=150×10

^{-3}A flows through the resistor of 4 ohms, then find the values of the current in mA which will be flowing in other two resistors?

Q. 9. A wire of length 2cm having resistance R is stretched to have an increase of 100% of original length . Find its new resistance with respect to its original resistance.

Q. 10. An electric lamp has resistance of 400 ohms. It is connected to a supply of 250V. If the price of electric energy is Rs.1.20 per unit, calculate the cost of lighting the lamp for 20 hours

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