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Electrical strain gauge works on the principle of __________.
- a)variation of resistance
- b)variation of capacitance
- c)variation of inductance
- d)variation of area
Correct answer is option 'A'. Can you explain this answer?
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Electrical strain gauge works on the principle of __________.a)variat...
An electrical strain gauge works based on the change in resistance as a function of strain. The wire resistance increases with tension and reduces with compression.
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Electrical strain gauge works on the principle of __________.a)variat...
Principle of Electrical Strain Gauge
The electrical strain gauge works on the principle of variation of resistance. It is a device used to measure strain or deformation in an object. When an external force is applied to an object, it undergoes deformation, and this deformation causes a change in the resistance of the strain gauge.
Working of Electrical Strain Gauge
The electrical strain gauge consists of a thin wire or a foil that is bonded to the surface of the object under study. When the object is subjected to a force, it deforms, causing the wire or foil to also deform. This deformation leads to a change in the length and cross-sectional area of the wire or foil, which in turn affects its electrical resistance.
Strain and Resistance
Strain is defined as the ratio of change in length to the original length of the object. It is a measure of the deformation or elongation of the object. When strain occurs, the length of the wire or foil in the strain gauge changes, which results in a change in its resistance.
The resistance of a wire or foil depends on its length, cross-sectional area, and resistivity. According to the formula for resistance (R = ρ * (L/A)), an increase in length or a decrease in cross-sectional area will result in an increase in resistance.
Wheatstone Bridge Configuration
To measure the change in resistance of the strain gauge accurately, it is connected in a Wheatstone bridge configuration. A Wheatstone bridge is a circuit consisting of four resistive arms, where the strain gauge is connected as one of the arms. The other three arms consist of known resistors.
Measurement of Strain
When a voltage is applied to the Wheatstone bridge, a current flows through it. The voltage across the strain gauge arm is measured using a voltmeter. As the object undergoes deformation, the resistance of the strain gauge changes, which causes an imbalance in the bridge circuit. This imbalance is detected as a change in the voltage across the strain gauge arm.
By measuring this change in voltage, the strain can be determined using the calibration curve specific to the strain gauge. The calibration curve relates the change in resistance to the corresponding strain applied to the object.
Conclusion
In conclusion, the electrical strain gauge works on the principle of variation of resistance. When an object undergoes deformation due to an applied force, the resistance of the strain gauge changes. By measuring this change in resistance, the strain can be determined, providing valuable information about the mechanical behavior of the object.
The electrical strain gauge works on the principle of variation of resistance. It is a device used to measure strain or deformation in an object. When an external force is applied to an object, it undergoes deformation, and this deformation causes a change in the resistance of the strain gauge.
Working of Electrical Strain Gauge
The electrical strain gauge consists of a thin wire or a foil that is bonded to the surface of the object under study. When the object is subjected to a force, it deforms, causing the wire or foil to also deform. This deformation leads to a change in the length and cross-sectional area of the wire or foil, which in turn affects its electrical resistance.
Strain and Resistance
Strain is defined as the ratio of change in length to the original length of the object. It is a measure of the deformation or elongation of the object. When strain occurs, the length of the wire or foil in the strain gauge changes, which results in a change in its resistance.
The resistance of a wire or foil depends on its length, cross-sectional area, and resistivity. According to the formula for resistance (R = ρ * (L/A)), an increase in length or a decrease in cross-sectional area will result in an increase in resistance.
Wheatstone Bridge Configuration
To measure the change in resistance of the strain gauge accurately, it is connected in a Wheatstone bridge configuration. A Wheatstone bridge is a circuit consisting of four resistive arms, where the strain gauge is connected as one of the arms. The other three arms consist of known resistors.
Measurement of Strain
When a voltage is applied to the Wheatstone bridge, a current flows through it. The voltage across the strain gauge arm is measured using a voltmeter. As the object undergoes deformation, the resistance of the strain gauge changes, which causes an imbalance in the bridge circuit. This imbalance is detected as a change in the voltage across the strain gauge arm.
By measuring this change in voltage, the strain can be determined using the calibration curve specific to the strain gauge. The calibration curve relates the change in resistance to the corresponding strain applied to the object.
Conclusion
In conclusion, the electrical strain gauge works on the principle of variation of resistance. When an object undergoes deformation due to an applied force, the resistance of the strain gauge changes. By measuring this change in resistance, the strain can be determined, providing valuable information about the mechanical behavior of the object.
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Electrical strain gauge works on the principle of __________.a)variation of resistanceb)variation of capacitancec)variation of inductanced)variation of areaCorrect answer is option 'A'. Can you explain this answer?
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