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- What is the total resistance of n resistors each of resistance 'R' connected in : (a) Series, (b) Parallel.
- A lamp rated 50W and an electric iron rated 800W are used for 6 hours everyday. Calculate the total energy consumed in 30 days.
- In the given circuit, calculate : (i) the total resistance of the circuit (ii) the current through the circuit, and
- A 2 kW heater, a 200 W TV and three 100 W lamps are all switched on from 6m. to 10 p.m. What is the total cost at Rs. 5.50 per kWh ?
- How will you connect three resistors of resistances 2 Ω, 3 Ω and 6Ω obtain a total n si stance of: (a) 4 Ω., and (b) 1Ω?

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