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Wael Hammad Questions
10601 Questions
The electrical resistance of the body, measured from hand to hand, will be different on different occasions. Why is this? Because the resistance of the skin:
Medicine
2022-10-22
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124
In an electrical device, a correctly installed earth wire provides protection against what?
Medicine
2022-10-22
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103
Suppose that while crawling around inside the roof space of your house, you touch a bare wire with your bare hand while touching the brick wall with the other bare hand. Which of the following wires would be most likely to deliver a fatal shock?
Medicine
2022-10-22
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170
What are the three wires connected to household ‘three pin plugs’ on electrical cords called?
Medicine
2022-10-22
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273
When electrical equipment becomes faulty, the casing (if made of metal) may become live. In this case what is the function of the earth wire on the equipment?
Medicine
2022-10-22
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The purpose of a fuse (or circuit breaker) is to prevent any fl ow of current. How is this done?
Medicine
2022-10-22
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In order for the ‘on-off’ switch and the fuse to operate as intended in AC circuits, which wires must they be placed on?
Medicine
2022-10-22
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272
Which one of the following statements is true?
Medicine
2022-10-22
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89
What is one difference between direct current (DC) and alternating current (AC)?
Medicine
2022-10-22
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112
What is one difference between static electricity and current electricity?
Medicine
2022-10-22
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101
Ohm’s law may be stated in the form: ‘the current fl owing in a circuit is the potential difference divided by the electrical resistance in the circuit’. If a person whose hand to hand resistance is 80,000 touches a live wire (attached to 240 V mains supply) and a wall at the same time?
Medicine
2022-10-21
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145
A person, holding to the edge of the bath, steps out onto an exposed wire in a frayed electrical cord attached to a domestic (240 V) radiant heater on the fl oor. Consequently a fatal current of 100 mA fl ows between their hand and foot. What must be the electrical resistance between these two point
Medicine
2022-10-21
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148
A household light globe with a power rating of 60 W operates at a potential difference of 240 V and has a resistance of 960 . Using this information and Ohm’s law, the current (I) may be calculated to be
Medicine
2022-10-21
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