# Tag Info

### Order of connection using digital multimeter wall outlet

Connect the neutral first. That way the unconnected probe will have less chance of being hot.
• 2,895

### Order of connection using digital multimeter wall outlet

My question is: does this order matter in an AC circuit such as a wall outlet? Where possible, it is best practice to connect the "less dangerous" terminal first and disconnect it last. ...
• 23k

### Can I use a High Rated DC Power Connector

The rated voltages and currents are the maximums you are allowed to use. Using a 20V 5A connector for 19V 2.5V is perfectly fine. Same goes for other things too. You can use a 16A mains plug or ...
• 164k
Accepted

### What is the best way to convert positive voltage to negative while consuming the smallest amount of power?

Where each rail takes either a similar current, or a low current, it's often better to split the battery voltage to provide a virtual ground somewhere between the rails. This is not the case if the ...
• 171k
Accepted

### How does an AC signal in a Transistor Amplifier Circuit swing output voltage if it is going below 0.7V?

Yes, your analysis is correct. That particular amplifier can't handle a 2 Vpp input signal without "clipping". That's the name of the effect that occurs when the transistor is driven into ...
• 176k
Accepted

### Is thick or thin wire better for motor winding?

Having chosen the power of the motor, and its volume and weight, and the space available for winding, and so the weight of the copper, you have finished that part of the design. To first order, the ...
• 171k
1 vote

### Why does a capacitor act as an open circuit under a dc circuit?

You can see from the other answers why it appears that way mathematically. Physically, it's because it is an open circuit! Consider the most basic form of a capacitor, the parallel plate capacitor. ...
1 vote

### Why does a capacitor act as an open circuit under a dc circuit?

The physics/nature of a capacitor are such that the current through them is proportionate to the rate of change of the voltage applied across their terminals. Since the rate of change is ...
• 22.9k
1 vote

### Why does a capacitor act as an open circuit under a dc circuit?

Current into or out of a capacitor is proportional to the rate of change of the voltage across its terminals. Vcc and ground are normally unchanging; decoupling capacitors are added to help them ...
• 21.3k
1 vote

### Order of connection using digital multimeter wall outlet

Your first misunderstanding is, when measuring a battery, it does not matter in any way if you connect black or red first. When measuring voltages in a device (like on a pcb), it is helpful to connect ...
• 78
1 vote

### RL, DC circuit with a resistor in parallel

This analysis is only valid for those who know the theory and use of the Laplace transform in the study of linear electric circuits. In non-electrical courses, probably, this study is optional. In any ...
• 1,674
1 vote
Accepted

### RL, DC circuit with a resistor in parallel

When the switch opens, inductor current can't change instantly. In other words, immediately after the instant of switch opening, inductor current is the same as it was immediately prior to the switch ...
• 42.2k
1 vote

### Why we don't use twisted cable in dc power?

BLUF: AC signals on wires are a two-way street (all applicable puns aside for this trite euphemism) - Twisting wires make results in less AC current passing than straight wires. Conversely, they also ...
• 11
1 vote

### Is it possible to power an AC-to-DC switching adapter with a DC input?

This will work fine until you have a short on the AC side upon which the poor AC rated fuse will see a DC arc. If you’re lucky, it will manage to break the current and everything is fine. If not, the ...
• 16k
1 vote

### How to tell if brushless DC motor is wired delta or Y?

You can take a look at connected cables of the copper coils. I'm going to use three-phase BLDC motor for example. From my understanding, Delta formation described as follows: End winding 1 connected ...
• 23

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