Table of Contents
- 1 What happens if you mix AC and DC current?
- 2 Can use AC breaker DC circuit?
- 3 Are DC breakers different than AC breakers?
- 4 Does current flow through the same resistor in a parallel circuit?
- 5 What is the difference between resistance value of AC and DC resistors?
- 6 How do you find the total current flowing through a resistor?
What happens if you mix AC and DC current?
On paper, there is nothing wrong in mixing (adding/connecting serially) AC and DC sources. AC voltage curve will be offset by the DC voltage value (same goes for the current). Thus, you will get a shifted sine wave. The effective RMS power will most likely fry any circuit/machine.
Can use AC breaker DC circuit?
Rahulk70. Hi, Let’s say I have a 20Amp GE AC circuit breaker. So, let’s say after testing it in a DC circuit with some loads and ammeter + clamp DC amp meter I find the current at which the breaker trips.
Are DC breakers different than AC breakers?
The differences between AC and DC circuit breakers. The main difference between DC circuit breakers and AC circuit breakers is the ability to de-energize. In short, DC is difficult to extinguish the arc, while AC is easy to extinguish the arc with an overshoot of zero.
Can DC electrical devices run on AC current?
There are devices which depend on AC in some fundamental way, like a motor creating alternating magnet fields. These do not work on DC. But other devices use DC internally, but are specified to run on AC. They convert the supply current to DC as the first step.
Why should there be a difference between AC and DC resistance?
The AC resistance is more than the DC resistance because the alternating current flowing through the conductor does not distribute uniformly and concentrates near the surface of the conductor and thus the effective cross-section area decrease and the resistance increase.
Does current flow through the same resistor in a parallel circuit?
For example, although the parallel combination has the same voltage across it, the resistances could be different therefore the current flowing through each resistor would definitely be different as determined by Ohms Law. Consider the two resistors in parallel above.
What is the difference between resistance value of AC and DC resistors?
The resistance value of the resistor in both AC and DC circuits is same irrespective of the frequency of the AC supply voltage. The change in direction of current in AC supply does not affect resistors behavior.
How do you find the total current flowing through a resistor?
Kirchhoff’s Current Laws states that: “ the total current leaving a circuit is equal to that entering the circuit – no current is lost “. Thus, the total current flowing in the circuit is given as: IT = IR1 + IR2 By using Ohm’s Law, we can calculate the current flowing through each parallel resistor shown in Example No2 above as being:
Why voltage and current are assumed to be constant in AC circuits?
Here the polarities of both voltage and current are assumed to be constant. In case of pure resistive AC circuits, the values of inductance and capacitance are negligible. Hence the calculation of current, voltage and power will follow the same principles of Ohm’s law and Kirchhoff’s Circuit laws.