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What happens to the current Amps flowing in a circuit when you raise or lower the frequency Hertz?
Wiki User
∙ 15y ago
<> <> <> This question is not asking about household power circuits which typically have an almost constant frequency of 50 Hz or 60 Hz. If a circuit includes inductance and capacitance then the answer below, marked by *** is incorrect. That answer is correct for purely resistive loads only.
An electric motor has inductance as well as resistance. The circuit inside a typical fluorescent light fixture contains a ballast - which has resistance and inductance - and a tube, which has capacitance, inductance and resistance. The currents flowing in the motor and the fluorescent light fixture would vary considerably if the frequency of the applied alternating voltage was allowed to alter.
Two other common examples:
i) a Hi-Fi or similar audio amplifier, driving a loudspeaker: the speaker has a coil in it which has inductance. The current (and hence the output power) of the speaker varies considerably with the audio frequency, typically between 20 Hz and 20,000 Hz (20 kiloHertz). For that reason different sized speakers - such as tweeters, mid-range, woofers and sub-woofers - each having different sizes of inductance and capacitance, are commonly used to produce the best "total overall sound output" from an amplifier.
ii) a tuning circuit for a radio: this must use both an inductance coil and a tuning capacitor. The current flowing in those components varies enormously between "out-of-tune" and "in-tune" settings of the tuning capacitor which makes the circuit tune "in" and "out" of radio frequencies in a specific range which the tuning circuit was designed to handle. Radio frequencies range between 50 kiloHertz and hundreds of GigaHertz or more. <> <> <> Changing the power source from AC to DC may have an effect on the current drawn but is dependent on the nature of the load. Any device is designed for AC or DC operation but rarely both. <> <> <> *** Note: the following answer is incorrect except for purely resistive loads. ***
The frequency of an AC voltage line has no effect on the current drawn for any given power. Voltage does have an effect on the current. <><><>
Wiki User
∙ 15y ago
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What happens when resistors are interconnected in a circuit?
The net resistance can be found out using the algebraic sums f series and parallel connections. When there is no current flowing in the circuit the net resistance is infinite.
What happens to the current flowing in the ring main as more bulbs are turned on at night?
As more light bulbs are added in a series circuit, the effective resistance of the circuit increases. That causes the current leaving the source to decrease.
What happens to current at resonant frequency?
Current is at maximum
What happens to current in a series circuit?
the current in series will be same..
What happens to the total power of a parallel circuit when one load opens?
You can't really talk about the power of a circuit. In electrical problems you have to be very careful about using the correct term. If you mean the current flowing in the circuit, and by opening the load you mean opening the switch which isolates it, then the total current will decrease. If you mean the voltage, this won't change.
What happens when an electric current is interupted?
When the circuit is interrupted, the current stops flowing.
What happens when an electric circuit is broken?
Then the current will stop flowing.
What happens when more than one resistor is connected to a circuit?
the current flowing in will be low
What happens to the total impedance of a series RC ciRCuit as the frequency is increased?
when the frequency is increased the total impedance of a series RC circuit is decrease.
What happens to the ammeter reading if resistor is removed?
Opening any circuit will stop the current from flowing.
What happens when you open a switch in a circuit?
The current to the load stops flowing and the load device stops operating.
What happens in a circuit at resonant frequency?
what is resonant frequency
What happens to a fuse when the flow of charges stop?
Current i.e.rate of flow of charge when stops flowing in a circuit then fuse does not blows out. The only work of fuse is to blow away when the current starts flowing greater in magnitude than the rated current value.
What happens when resistors are interconnected in a circuit?
The net resistance can be found out using the algebraic sums f series and parallel connections. When there is no current flowing in the circuit the net resistance is infinite.
What happens when you open a switch in a series crcuit?
A closed series circuit is one where the current flows through all devices in the circuit. Opening a switch prevents current from flowing in the circuit and it becomes simply an "open circuit". Any device that operates with current (light, LED, motor, etc) will no longer function.
What happens to the current flowing in the ring main as more bulbs are turned on at night?
As more light bulbs are added in a series circuit, the effective resistance of the circuit increases. That causes the current leaving the source to decrease.
What happens to current at resonant frequency?
Current is at maximum
