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As little as possible, since the ammeter must be inserted in the circuit,
and the current it measures must flow through it.
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.
Resistance is measured in Ohms with an Ohm meter or multi meter set on Ohms. Maybe you should rephrase your question. -Bob
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Why transistor is called transfer of resistor?
Transistor=Transfer+Resistor. When Transistor operates in active region its input resistance is high and output resistance is low. So,We can consider transistor as a device which transfers its resistance from high to low. And by this property transistor amplifies input signal.
Is it desirable for a battery to have a high internal resistance?
No, it is desirable for a battery to have a low internal resistance.
How does an ammeter work?
An ammeter is a low voltage voltmeter in parallel with a small resistance resistor. Current flow through the resistor creates a voltage drop across it which is then measured by the voltmeter.
Which components have a high resistance in the dark but low resistance in the light?
A Cadmium Disulphide cell. (aka Cds cell)
Why does copper have a low resistance?
Because it is a metal so has lots of free electrons which when connected to a circuit detach from the atoms and move around the circuit. This produces a high current, so resistance will be low as current is high.
What wire connection better high or low resistance?
Usually low resistance is better.
Why transistor is called transfer of resistor?
Transistor=Transfer+Resistor. When Transistor operates in active region its input resistance is high and output resistance is low. So,We can consider transistor as a device which transfers its resistance from high to low. And by this property transistor amplifies input signal.
What is the Q factor in RLC circuit?
It is related to damping in the circuit using a resistor. Q is inversely proportional to the resistor(R). So if the value of resistance is high, there is a greater damping and the value of Q will be low. if resistance is low, there is small damping and Q will be high. when Q is high(low damping) the graph of voltage across resistor against frequency will be sharp at resonance and the bandwidth will be small when Q is low(high damping) thee graph will be less sharp as the bandwidth will be large. Go do some research on the graphs and the formula of Q factor to understand it better.
What resistance of a connecting wire is less than the resistance of a resistor?
The resistance of a connecting wire that is less than the resistance of a resistor would depend on the materials and dimensions of the wire and resistor. Generally, most connecting wires have very low resistance compared to resistors. Copper wires, for example, have low resistance and are commonly used for connecting circuits.
Is a switch and example of a resistor?
No it is not. A resistor has a known resistance that is less than infinity. A switch has a resistance of either infinity when it is open or low when it is closed
Is graphite a high resistance or low resistance of electricity?
Graphite is low resistance of electricity...
How you convert galvanometer into ammeter in detail?
To convert a galvanometer into an ammeter, you need to connect a low resistance in parallel with the galvanometer. This low resistance is called a shunt resistor. By selecting the appropriate shunt resistor value, you can calibrate the galvanometer to accurately measure higher currents. The formula to calculate the shunt resistor value is Rs = G * (Imax/Ig - 1), where Rs is the shunt resistor value, G is the resistance of the galvanometer, Imax is the maximum current the ammeter will measure, and Ig is the full-scale current of the galvanometer.
What is a heater blower resistor?
Heater blower resistor is what controls the low medium high speeds...
What is ment by high resistance and low resistance on a meter?
On a multimeter, a high resistance would indicate a high Ohmic value and a low resistance would indicate a low Ohmic value. Specific values would be relative to device you are measuring.
Do meters usually have a high or low internal resistance?
It depends on the application. Voltmeters have a high internal resistance, while ammeters have a low internal resistance.
What is high resistance what is low resistance?
Low resistance lets electrons through easy, and high makes it harder for them to pass. Basically electricity is harder to flow through high resistance and vice versa.
What is high resistance and low resistance?
Low resistance lets electrons through easy, and high makes it harder for them to pass. Basically electricity is harder to flow through high resistance and vice versa.
