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The arm consisting of the standard known resistance R3 is known as __________.
- a)standard arm
- b)resistance arm
- c)accurate arm
- d)known arm
Correct answer is option 'A'. Can you explain this answer?
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The arm consisting of the standard known resistance R3 is known as __...
The arm consisting of the standard known resistance R3 is known as the legal arm. Using this resistance value, the unknown resistance can be determined using the balance condition.
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The arm consisting of the standard known resistance R3 is known as __...
The arm consisting of the standard known resistance R3 is known as the "standard arm".
Explanation:
- The term "standard arm" is commonly used in electrical circuits where a Wheatstone bridge is employed to measure unknown resistance.
- A Wheatstone bridge is a circuit that is used to measure an unknown electrical resistance by balancing two legs of a bridge circuit.
- The bridge circuit consists of four resistors, with one of them being the unknown resistance.
- The standard arm is one of the legs of the bridge circuit and consists of a known resistance, denoted as R3.
- The other three arms of the bridge circuit are the unknown resistance (Rx), a variable resistance (R2), and a ratio arm (R1).
- The ratio arm is used to balance the bridge circuit by adjusting the variable resistance until the bridge is balanced.
- When the bridge is balanced, the ratio of the known resistance (R3) to the unknown resistance (Rx) is equal to the ratio of the variable resistance (R2) to the ratio arm (R1).
- By knowing the values of R1, R2, and R3, the unknown resistance (Rx) can be calculated.
In summary, the standard arm, consisting of the known resistance R3, is an essential component of the Wheatstone bridge circuit used to measure unknown resistances. It helps in balancing the bridge circuit and calculating the value of the unknown resistance.
Explanation:
- The term "standard arm" is commonly used in electrical circuits where a Wheatstone bridge is employed to measure unknown resistance.
- A Wheatstone bridge is a circuit that is used to measure an unknown electrical resistance by balancing two legs of a bridge circuit.
- The bridge circuit consists of four resistors, with one of them being the unknown resistance.
- The standard arm is one of the legs of the bridge circuit and consists of a known resistance, denoted as R3.
- The other three arms of the bridge circuit are the unknown resistance (Rx), a variable resistance (R2), and a ratio arm (R1).
- The ratio arm is used to balance the bridge circuit by adjusting the variable resistance until the bridge is balanced.
- When the bridge is balanced, the ratio of the known resistance (R3) to the unknown resistance (Rx) is equal to the ratio of the variable resistance (R2) to the ratio arm (R1).
- By knowing the values of R1, R2, and R3, the unknown resistance (Rx) can be calculated.
In summary, the standard arm, consisting of the known resistance R3, is an essential component of the Wheatstone bridge circuit used to measure unknown resistances. It helps in balancing the bridge circuit and calculating the value of the unknown resistance.
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The arm consisting of the standard known resistance R3 is known as __________.a)standard armb)resistance armc)accurate armd)known armCorrect answer is option 'A'. Can you explain this answer?
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