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A voltmeter connected across 15 kΩ resistor reads 10 V in the circuit given. Voltmeter is rated at 500 Ω / volt and has a full- scale reading of 20 V. The supply voltage is:
- a)60 V
- b)45 V
- c)30 V
- d)90 V
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
A voltmeter connected across 15 k resistor reads 10 V in the circuit g...
Concept:
The voltmeter sensitivity (Sv) is determined by dividing the sum of the resistance of the meter (Rm)
Mathematically, sensitivity is expressed as:
E = Rated Voltage or Full scale Reading
Voltmeter sensitivity is expressed in Ohm/Volt
Rm = Sv × E
Calculation:
Sensitivity of voltmeter = 500 Ω/V
Internal resistance of voltmeter = 500 × 20 = 10 kΩ
Effective resistance across A – B is
= 10 || 15 = 6 kΩ
The voltmeter reading is 10 V
⇒ VAB = 10 V
By voltage division,
⇒ Vs = 60 V
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A voltmeter connected across 15 k resistor reads 10 V in the circuit given. Voltmeter is rated at 500 / volt and has a full- scale reading of 20 V. The supply voltage is:a)60 Vb)45 Vc)30 Vd)90 VCorrect answer is option 'A'. Can you explain this answer?
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A voltmeter connected across 15 k resistor reads 10 V in the circuit given. Voltmeter is rated at 500 / volt and has a full- scale reading of 20 V. The supply voltage is:a)60 Vb)45 Vc)30 Vd)90 VCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for A voltmeter connected across 15 k resistor reads 10 V in the circuit given. Voltmeter is rated at 500 / volt and has a full- scale reading of 20 V. The supply voltage is:a)60 Vb)45 Vc)30 Vd)90 VCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of A voltmeter connected across 15 k resistor reads 10 V in the circuit given. Voltmeter is rated at 500 / volt and has a full- scale reading of 20 V. The supply voltage is:a)60 Vb)45 Vc)30 Vd)90 VCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
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