SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A battery and a paper clip
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A battery and a wire
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A paper clip and a wire
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A switch and a wire
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Detailed explanation-1: -When a light bulb connects to an electrical power supply, an electrical current flows from one metal contact to the other. As the current travels through the wires and the filament, the filament heats up to the point where it begins to emit photons, which are small packets of visible light.
Detailed explanation-2: -To light up the bulb, the electrical circuit needs to be completed that is, a connection be made between the light bulb and the wires so that the latter can transmit electric current to the bulb. For this the electrical circuit needs to be closed.
Detailed explanation-3: -The thin wire that gives off light is known as the filament of the bulb and it is made up of tungsten.
Detailed explanation-4: -Strip about 3/4″ of insulation off each end of your two wires. Tape one end of one wire to the negative end of your battery. Tape the other end of the wire to one side of the light bulb stem. Tape one end of the other wire to the positive end of your battery. Watch the light bulb light up! 28-Jun-2013