The commonly used standard cell has a width of 1 cm, and thus for very pure water in equilibrium with air would have a resistance of about 10 6 ohm, known as a megohm.
32.
In the dark, a photoresistor can have a resistance as high as several megohms ( M? ), while in the light, a photoresistor can have a resistance as low as a few hundred ohms.
33.
Commonly used multiples and submultiples in electrical and electronic usage are the microohm, milliohm, kilohm, megohm, and gigaohm; the term " gigohm ", though not official, is in common use for the latter.
34.
For example, the gain may be required to be 100 times, with a tolerance of 5 % but drift of less than 1 % in a specified temperature range; the input impedance not less than one megohm; etc.
35.
This arrangement of passive components forms a resistively-damped second-order low-pass megohm or more, and a low impedance load reduces the high-frequency response of the pickup because of the filtering effect of the inductance.
36.
If there were 100 insulators on a long fence, the leakage resistance would have a combined resistance of . 5 megohm, the same as yours ( hypothetically ) and half the jolt would go through the fence leakage to ground.
37.
This is often either one or ten megohms; the standardization of the input resistance allows the use of external high-resistance probes which form a voltage divider with the input resistance to extend voltage range up to tens of thousands of volts.
38.
More modern probe designs use a thick-film electronic circuit in the head that combines the 9 megohm resistor with a fixed-value bypass capacitor; they then place a small adjustable capacitor in parallel with the oscilloscope's input capacitance.
39.
High-impedance scope probes are designed for the conventional 1 megohm oscilloscope, but the 1 megohm input impedance is only at low frequency; the input impedance is not a constant 1 megohm across the probe's bandwidth but rather decreases with frequency.
40.
High-impedance scope probes are designed for the conventional 1 megohm oscilloscope, but the 1 megohm input impedance is only at low frequency; the input impedance is not a constant 1 megohm across the probe's bandwidth but rather decreases with frequency.
