When 1 mega Ohm resistors are used?

In summary, a 1 mega Ohm resistor is an electrical component with a resistance of 1 million Ohms that is commonly used in electronic circuits for limiting current flow and providing stability. They are popular due to their high resistance value and availability. The tolerance of a 1 mega Ohm resistor varies but is typically around 5%. They limit current flow in circuits, which can protect components and provide stability. 1 mega Ohm resistors can be used in place of other resistors, but it is important to consider the resistance value and tolerance of the original resistor.
  • #1
angelspikes
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When and "for what purpose"/why are 1 mega ohm (1 MΩ) resistors used in filters, such as high pass filters? Is it with regards to electrostatic discharge or impedance matching?

What difference does it make, if I only use a 10 K ohm resistor, when the high pass frequency will be the same (by changing the value of the capacitor)?
 
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  • #2
They are used, for example, as a feedback device in charge-sensitive amplifiers. If you use a 10 k Ohm resistor you can have more current that a 1 M Ohm resistor. Sometimes that matters.
 

1. What is a 1 mega Ohm resistor?

A 1 mega Ohm resistor is an electrical component that has a resistance of 1 million Ohms. It is commonly used in electronic circuits to limit the flow of current and provide stability.

2. Why are 1 mega Ohm resistors commonly used?

1 mega Ohm resistors are commonly used because they have a high resistance value, which makes them useful for limiting current flow and providing stability in electronic circuits. They are also readily available and relatively inexpensive.

3. What is the tolerance of a 1 mega Ohm resistor?

The tolerance of a 1 mega Ohm resistor varies depending on the manufacturer, but it is typically around 5%. This means that the actual resistance of the resistor can vary by up to 5% from the stated value of 1 mega Ohm.

4. How do 1 mega Ohm resistors affect the flow of current in a circuit?

1 mega Ohm resistors limit the flow of current in a circuit by providing a high resistance. This reduces the amount of current that can flow through the circuit, which can protect components from damage and provide stability.

5. Can 1 mega Ohm resistors be used in place of other resistors?

Yes, 1 mega Ohm resistors can be used in place of other resistors, but it is important to consider the resistance value and tolerance of the original resistor. Using a resistor with a significantly different resistance value can affect the performance of the circuit.

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