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The battery voltage of an analog multimeter drops by 20% of its original value. The multimeter is used to measure dc voltage of a circuit. The true voltage compared to the measured value is
- a)10% higher
- b)20% higher
- c)20% lower
- d)Same
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
The battery voltage of an analog multimeter drops by 20% of its origin...
The internal battery of an analog multimeter is used to find resistance. The battery voltage doesn’t influence the measurement of voltage. Hence, the true value and measured value both are same.
Most Upvoted Answer
The battery voltage of an analog multimeter drops by 20% of its origin...
Explanation:
When the battery voltage of an analog multimeter drops by 20% of its original value, it means that the battery now has 80% of its original voltage.
In an analog multimeter, the battery is used to power the meter movement, which is a coil of wire suspended in a magnetic field. When a voltage is applied to the meter, the current passing through the coil creates a magnetic field that interacts with the field from permanent magnets, causing the coil to rotate. The rotation is proportional to the current or voltage being measured.
When the battery voltage drops, it affects the current passing through the coil, leading to a decrease in the rotation of the coil. This decrease in rotation results in a lower reading on the meter scale.
Comparison:
To determine the true voltage compared to the measured value, we need to compare the original voltage (100%) with the measured voltage (80%).
The measured voltage is 80% of the original voltage, which means it is 20% lower than the original value.
Therefore, the true voltage is the same as the measured value.
Answer:
The correct answer is option D) Same. The true voltage is the same as the measured value.
When the battery voltage of an analog multimeter drops by 20% of its original value, it means that the battery now has 80% of its original voltage.
In an analog multimeter, the battery is used to power the meter movement, which is a coil of wire suspended in a magnetic field. When a voltage is applied to the meter, the current passing through the coil creates a magnetic field that interacts with the field from permanent magnets, causing the coil to rotate. The rotation is proportional to the current or voltage being measured.
When the battery voltage drops, it affects the current passing through the coil, leading to a decrease in the rotation of the coil. This decrease in rotation results in a lower reading on the meter scale.
Comparison:
To determine the true voltage compared to the measured value, we need to compare the original voltage (100%) with the measured voltage (80%).
The measured voltage is 80% of the original voltage, which means it is 20% lower than the original value.
Therefore, the true voltage is the same as the measured value.
Answer:
The correct answer is option D) Same. The true voltage is the same as the measured value.
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The battery voltage of an analog multimeter drops by 20% of its original value. The multimeter is used to measure dc voltage of a circuit. The true voltage compared to the measured value isa)10% higherb)20% higherc)20% lowerd)SameCorrect answer is option 'D'. Can you explain this answer?
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