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Draw and label the free-body diagram of the two significant forces that are acting on the object of unknown mass, as illustrated in Diagram II. Explain how you estimated the relative lengths of the two arrows Identify one characteristic of the electromagnetic radiation emitted by the LED that is necessary to activate the light detector

Draw and label the free-body diagram of the two significant forces that are acting on the object of unknown mass, as illustrated in Diagram II. Explain how you estimated the relative lengths of the two arrows Identify one characteristic of the electromagnetic radiation emitted by the LED that is necessary to activate the light detector

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Draw and label the free-body diagram of the two significant forces that are acting on the object of unknown mass, as illustrated in Diagram II. Explain how you estimated the relative lengths of the two arrows Identify one characteristic of the electromagnetic radiation emitted by the LED that is necessary to activate the light detector
Transcribed Image Text:Draw and label the free-body diagram of the two significant forces that are acting on the object of unknown mass, as illustrated in Diagram II. Explain how you estimated the relative lengths of the two arrows Identify one characteristic of the electromagnetic radiation emitted by the LED that is necessary to activate the light detector
Description of the Operation of an Electronic Scale Diagram I: No object on the scale pan Light detector Balance pan LED Coil. Control unit Cylindrical- magnet Diagram II: An object is placed on the scale pan Object of unknown- mass Light reaches detector LED Control unit Diagram III: Measurement of current to determine mass Light blocked by shield Control unit A shield blocks light from the LED, preventing it from reaching the light detector. The control unit does not supply current to the coil. The weight of the object moves the pan downward. As a result, the shield moves down and light from the LED reaches the light detector. The presence of light on the light detector signals the control unit to supply current to the coil. The current in the coil induces a magnetic field. The interaction of this field with that of the permanent magnet forces the pan upward. The control unit increases the current until the shield is high enough to block the light from the LED. The control unit then determines the current required to keep the pan at this fixed height. The measurement of this current is used to determine the mass of the object.
Transcribed Image Text:Description of the Operation of an Electronic Scale Diagram I: No object on the scale pan Light detector Balance pan LED Coil. Control unit Cylindrical- magnet Diagram II: An object is placed on the scale pan Object of unknown- mass Light reaches detector LED Control unit Diagram III: Measurement of current to determine mass Light blocked by shield Control unit A shield blocks light from the LED, preventing it from reaching the light detector. The control unit does not supply current to the coil. The weight of the object moves the pan downward. As a result, the shield moves down and light from the LED reaches the light detector. The presence of light on the light detector signals the control unit to supply current to the coil. The current in the coil induces a magnetic field. The interaction of this field with that of the permanent magnet forces the pan upward. The control unit increases the current until the shield is high enough to block the light from the LED. The control unit then determines the current required to keep the pan at this fixed height. The measurement of this current is used to determine the mass of the object.
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