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l. A cell has a terminal voltage of 50.0 V for a current of l_d.0 A, and 54 V for a current of 6.0 A. find the electromotive force and internal resistance of ' the cell. . 2. A compact fluorescent lamp (CFL) uses less energy than its equivalent incandescent bulb. How much will a person save if he/she uses a 20 W CFL instead of a 100W incandescent lamp for 6 h in 30 days? Electricity is priced ' at P8.l7/kWoh. ' ' ' ' ' 3. A person plugged a l250 W electric heater into the same 120 V outlet protected by a 7.5 A circuit breaker. Will the breaker trip? 4. A charge of 20 C flows out from a battery in 8 s and. as a result, 120 J of energy is supplied to a lamp connected across the battery. (a) How much current passes through the lamp? (b) What is the potential difference across the lamp