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Question 1 of 9
1. Question
1 point(s)A transformer has a primary coil with 2500 turns and secondary coil with 1500 turns is connected to a 240V power supply. Find the voltage of the secondary coil.
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Question 2 of 9
2. Question
1 point(s)An ideal transformer is supplied with voltage 240V. It is found that the potential difference of the secondary coil is 12V and the current is 3A. Find the current in the primary coil.
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Question 3 of 9
3. Question
1 point(s)An alternating current of 2A is supplied to a transformer. Given that the efficiency of the transformer is 75%. If the potential difference and current of the output is 1200V and 0.3A respectively. Find the potential difference across the primary coil.
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Question 4 of 9
4. Question
1 point(s)A step-down transformer is used to lower the voltage of supply from 240V to 60V. The current flow in the primary coil and secondary coils are 2A and 6A respectively. Determine the efficiency of the transformer.
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Question 5 of 9
5. Question
1 point(s)Which of the following is not a renewable energy?
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Question 6 of 9
6. Question
1 point(s)Which of the following is not the advantage of using National Grid Network
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Question 7 of 9
7. Question
1 point(s)Which of the following is NOT TRUE about the disadvantages of using fossil fuel as a source of energy?
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Question 8 of 9
8. Question
1 point(s)Which of the following is NOT the problems involving electricity transmission?
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Question 9 of 9
9. Question
1 point(s)In a transmission of electricity from place A to place B, the electrical energy is transmitted at the rate of 100kW and the potential difference across the cable is 20kV. Find the power loss in the transmission if the resistance of the cable is 5 Ohm.
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