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The shunt type ohmmeter is not suitable for high resistance measurement because
- a)very low resistance of the meter would short the high unknown resistance
- b)scale is highly cramped for high resistance values
- c)full scale value of the meter may be exceeded
- d)battery cannot supply the necessary current for proper meter deflection.
Correct answer is option 'B'. Can you explain this answer?
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The shunt type ohmmeter is not suitable for high resistance measuremen...
Introduction:
The shunt type ohmmeter is a device used to measure the resistance of a circuit or component. It works by passing a known current through the resistance and measuring the voltage across it. However, the shunt type ohmmeter is not suitable for high resistance measurements.
Explanation:
a) Very low resistance of the meter would short the high unknown resistance:
This option is not the correct answer because the shunt type ohmmeter is designed to have a very low internal resistance. This is necessary to ensure that the majority of the current flows through the unknown resistance being measured. By having a low internal resistance, the meter does not interfere with the measurement of high resistance values.
b) Scale is highly cramped for high resistance values:
This option is the correct answer. The scale of the shunt type ohmmeter is typically designed to accommodate a range of resistance values, from low to moderate values. For high resistance measurements, the scale becomes highly cramped, meaning that the graduations on the scale are very close together. This makes it difficult to accurately read the resistance value and introduces a higher level of uncertainty in the measurement.
c) Full scale value of the meter may be exceeded:
This option is not the correct answer because the full scale value of the meter refers to the maximum value that the meter can measure. It does not relate to the suitability of the shunt type ohmmeter for high resistance measurements. The full scale value can be adjusted or selected based on the specific range of resistance values to be measured.
d) Battery cannot supply the necessary current for proper meter deflection:
This option is not the correct answer because the battery used in the shunt type ohmmeter is typically selected to provide the necessary current for proper meter deflection. The battery's capacity and voltage are chosen based on the requirements of the meter and the range of resistance values to be measured.
Conclusion:
The shunt type ohmmeter is not suitable for high resistance measurements because the scale becomes highly cramped, making it difficult to accurately read the resistance value. The other options provided do not accurately explain why the shunt type ohmmeter is not suitable for high resistance measurements.
The shunt type ohmmeter is a device used to measure the resistance of a circuit or component. It works by passing a known current through the resistance and measuring the voltage across it. However, the shunt type ohmmeter is not suitable for high resistance measurements.
Explanation:
a) Very low resistance of the meter would short the high unknown resistance:
This option is not the correct answer because the shunt type ohmmeter is designed to have a very low internal resistance. This is necessary to ensure that the majority of the current flows through the unknown resistance being measured. By having a low internal resistance, the meter does not interfere with the measurement of high resistance values.
b) Scale is highly cramped for high resistance values:
This option is the correct answer. The scale of the shunt type ohmmeter is typically designed to accommodate a range of resistance values, from low to moderate values. For high resistance measurements, the scale becomes highly cramped, meaning that the graduations on the scale are very close together. This makes it difficult to accurately read the resistance value and introduces a higher level of uncertainty in the measurement.
c) Full scale value of the meter may be exceeded:
This option is not the correct answer because the full scale value of the meter refers to the maximum value that the meter can measure. It does not relate to the suitability of the shunt type ohmmeter for high resistance measurements. The full scale value can be adjusted or selected based on the specific range of resistance values to be measured.
d) Battery cannot supply the necessary current for proper meter deflection:
This option is not the correct answer because the battery used in the shunt type ohmmeter is typically selected to provide the necessary current for proper meter deflection. The battery's capacity and voltage are chosen based on the requirements of the meter and the range of resistance values to be measured.
Conclusion:
The shunt type ohmmeter is not suitable for high resistance measurements because the scale becomes highly cramped, making it difficult to accurately read the resistance value. The other options provided do not accurately explain why the shunt type ohmmeter is not suitable for high resistance measurements.
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The shunt type ohmmeter is not suitable for high resistance measurement becausea)very low resistance of the meter would short the high unknown resistanceb)scale is highly cramped for high resistance valuesc)full scale value of the meter may be exceededd)battery cannot supply the necessary current for proper meter deflection.Correct answer is option 'B'. Can you explain this answer?
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