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Which of the following statement is NOT correct?
- a)Four terminal is required for measurement of low resistance
- b)For measurement of medium resistance only two terminal is required
- c)To measure high resistance, three terminal is required
- d)To measure high resistance, only one terminal is required
Correct answer is option 'D'. Can you explain this answer?
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Which of the following statement is NOT correct?a)Four terminal is req...
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Which of the following statement is NOT correct?a)Four terminal is req...
Explanation:
Four terminal method for low resistance measurement:
- Four terminal method is used for measuring low resistances accurately, typically below 1 ohm.
- This method eliminates errors caused by lead resistances and contact resistances.
- It requires four terminals - two current-carrying terminals and two voltage-measuring terminals.
Two terminal method for medium resistance measurement:
- Two terminal method is commonly used for measuring medium resistances, typically between 1 ohm to 1 megaohm.
- It involves passing a current through the resistor and measuring the voltage drop across it using only two terminals.
Three terminal method for high resistance measurement:
- Three terminal method is used for measuring high resistances, typically above 1 megaohm.
- It involves using three terminals - one for applying voltage, one for measuring the current, and one for measuring the voltage across the resistor.
- This method helps in eliminating errors due to leakage currents and contact resistances.
Not requiring one terminal for high resistance measurement:
- The statement that high resistance measurement requires only one terminal is incorrect.
- To accurately measure high resistances, at least three terminals are required to ensure accurate measurements and eliminate errors.
Four terminal method for low resistance measurement:
- Four terminal method is used for measuring low resistances accurately, typically below 1 ohm.
- This method eliminates errors caused by lead resistances and contact resistances.
- It requires four terminals - two current-carrying terminals and two voltage-measuring terminals.
Two terminal method for medium resistance measurement:
- Two terminal method is commonly used for measuring medium resistances, typically between 1 ohm to 1 megaohm.
- It involves passing a current through the resistor and measuring the voltage drop across it using only two terminals.
Three terminal method for high resistance measurement:
- Three terminal method is used for measuring high resistances, typically above 1 megaohm.
- It involves using three terminals - one for applying voltage, one for measuring the current, and one for measuring the voltage across the resistor.
- This method helps in eliminating errors due to leakage currents and contact resistances.
Not requiring one terminal for high resistance measurement:
- The statement that high resistance measurement requires only one terminal is incorrect.
- To accurately measure high resistances, at least three terminals are required to ensure accurate measurements and eliminate errors.
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Which of the following statement is NOT correct?a)Four terminal is required for measurement of low resistanceb)For measurement of medium resistance only two terminal is requiredc)To measure high resistance,three terminal is requiredd)To measure high resistance, only one terminal is requiredCorrect answer is option 'D'. Can you explain this answer?
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