Admin Table of Contents
- 1 What range of the scale are resistance readings more reliable?
- 2 In what way is the scale of the ohmmeter different from the other scales?
- 3 Why the scale of ohmmeter is nonlinear?
- 4 What is the most important part of the ohmmeter it indicates the value of electrical quantity that has been measured?
- 5 How does the length of the wire affect the resistance?
What range of the scale are resistance readings more reliable?
Ohms on the meter scale. The times one scale lets you read the actual number without a multiplier. The meter reading is most accurate if you adjust the selector switch for a reading / measurement which is mid range on the scale. selector switch and then you will see a measurement of 1.5 Ohms.
In what way is the scale of the ohmmeter different from the other scales?
Ohmmeters contain internal sources of voltage to supply power in taking resistance measurements. An analog ohmmeter scale is “backwards” from that of a voltmeter or ammeter, the movement needle reading zero resistance at full-scale and infinite resistance at rest. Analog ohmmeters are not precision instruments.
Where is the reading of the resistance based?
2. Ohmmeter Scale- Nonlinear scale where reading of the resistance is based. It is usually found in the uppermost part of the VOM. Range Multiplier- The portion of the ohmmeter where the actual reading is being multiplied.
Why the scale of ohmmeter is nonlinear?
Most Ohm-meters measure the resistance (ohms) by measuring the current through the resistor when a known voltage is applied. Since Ohms = Voltage divided by Current, Ohms are INVERSELY proportional to Current, the Ohms scale is not linear on a meter that senses the current.
What is the most important part of the ohmmeter it indicates the value of electrical quantity that has been measured?
1. Pointer. It is the most important part of the ohmmeter. It indicates the value of electrical quantity that has been measured.
What do we call with the nonlinear scale where reading of resistance is based?
Ohmmeter Scale- Nonlinear scale where reading of the resistance is based.
How does the length of the wire affect the resistance?
The resistance of a long wire is greater than the resistance of a short wire because electrons collide with more ions as they pass through. The relationship between resistance and wire length is proportional .