2. Graphs of current against voltage for two resistors P and Q are shown below Determine...
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2. Graphs of current against voltage for two resistors P and Q are shown below Determine the value of each resistor. [5 pts] Current/mA 10 8- So 4 2 4 8 12 16 Voltage/μV 20 24 3. A DC electric motor consumes 72MJ when connected to 400Vsupply for 2 h 30 min. (a) Find the power rating in kW of the motor and the current taken from the supply. (b) Determine the efficiency of this DC motor if the Pin = 9.35kW. Show your motor circuit and/or the block diagram of energy conversion. [5 pts] 4. A voltage of 500V is applied across the winding of an electric motor and the resistance of the winding is 5002. Determine the power dissipated by the coil. [5 pts] 5. Calculate the power dissipated in kW by the element of an electric oven of resistance 3092 when a current of 10A flows in it. If the oven is on for 30 hours in a week determine the energy used. Determine also the weekly cost of energy in AED if electricity costs 13.5 fills per kWHr. [5 pts] 6. In a household during a particular week three 2kW fire place are used on average of 25 hour each and eight 100 W light bulbs are used on average 35 hours each. Determine the cost of electricity (in AED) for ONE week if 1 unit of electricity costs 15 fills. [5 pts] 2. Graphs of current against voltage for two resistors P and Q are shown below Determine the value of each resistor. [5 pts] Current/mA 10 8- So 4 2 4 8 12 16 Voltage/μV 20 24 3. A DC electric motor consumes 72MJ when connected to 400Vsupply for 2 h 30 min. (a) Find the power rating in kW of the motor and the current taken from the supply. (b) Determine the efficiency of this DC motor if the Pin = 9.35kW. Show your motor circuit and/or the block diagram of energy conversion. [5 pts] 4. A voltage of 500V is applied across the winding of an electric motor and the resistance of the winding is 5002. Determine the power dissipated by the coil. [5 pts] 5. Calculate the power dissipated in kW by the element of an electric oven of resistance 3092 when a current of 10A flows in it. If the oven is on for 30 hours in a week determine the energy used. Determine also the weekly cost of energy in AED if electricity costs 13.5 fills per kWHr. [5 pts] 6. In a household during a particular week three 2kW fire place are used on average of 25 hour each and eight 100 W light bulbs are used on average 35 hours each. Determine the cost of electricity (in AED) for ONE week if 1 unit of electricity costs 15 fills. [5 pts]
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2 From the graph it is clear that For resistor P When ... View the full answer
Related Book For
Horngrens Financial and Managerial Accounting
ISBN: 978-0133866292
5th edition
Authors: Tracie L. Nobles, Brenda L. Mattison, Ella Mae Matsumura
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