SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They are useful for making the circuit look better because of how they are colored
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They are useful for measuring electricity
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They are useful for regulating/controlling the current (electron flow) in a circuit
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They are useless
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Detailed explanation-1: -A resistor is an electrical component that limits or regulates the flow of electrical current in an electronic circuit. Resistors can also be used to provide a specific voltage for an active device such as a transistor.
Detailed explanation-2: -Variable resistors can be used to adjust circuit elements (such as a volume control or a lamp dimmer), or as sensing devices for heat, light, humidity, force, or chemical activity.
Detailed explanation-3: -A switch is the device which controls the flow of current through a circuit.
Detailed explanation-4: -Switches and rheostats control the flow of electric charges according to the positioning of a mechanical device, which is actuated by some physical force external to the circuit.
Detailed explanation-5: -Resistors control how much electric charge flows through a circuit each second – the size of the current in the circuit. They do this by controlling how difficult it is for electric charges to flow in the circuit – that is, the resistance in the circuit.