Which is better high resistance or low resistance resistor?

Answer 1

As little as possible, since the ammeter must be inserted in the circuit,

and the current it measures must flow through it.

Answer 2

A resistance opposes the flow of electric current. So, in terms of conductivity, obviously a low resistance is better. Besides, heat is developed as a result of resistance, which is not desireable in some appliances. However, the choice is different depending upon the instrument or appliance. For instance, heater requires materials of much higher resistance than bulbs.

Surely the electrical resistance of a heater is lower than that of a lightbulb, since the heater uses much more current?

The second comment is correct - a heaters resistance is typically much less than that of a light bulb, meaning more current will flow at a specified voltage, thus more power is used by the device. Taken another way, a 13 watt lightbulb will have a much higher resistance than a 100 watt light bulb, because they are both made to operate on 120 volts, but one uses more power than the other.

To answer the original question, though, it depends on the purpose of the resistor. If you wish to limit current flow to the base of an amplifier circuit, you would use a relatively high resistance. If you used too high a resistance, this can negatively impact the amplifier's ability to amplify, so perhaps a lower resistance resistor would be appropriate (again, depending on the use!). But a very low resistance may increase the base current flow to unnecessary levels, thus wasting energy. If this is in a battery operated device, this would not be ideal either, so a higher resistance may be appropriate.

Sometimes it doesn't really matter, other times it really really does. A specific example needs to be given for a specific (true) answer to be given.

Answer 3

Resistance is measured in Ohms with an Ohm meter or multi meter set on Ohms. Maybe you should rephrase your question. -Bob

Answer 4

low resistance.

Answer 5

low