According to the principle of safe use of electricity, the fuse, switch and resistance wire of electric kettle are respectively connected to the live wire, ground wire and zero wire?

The fuse should be a fuse, which is the incoming end of the fuse
Switches are also ground wires
A resistance wire is connected with a live wire at one end and a neutral wire at the other end
The ground wire is from the shell

In the home circuit, the light goes out suddenly. Use the electric pen to measure the live line and the zero line respectively, and the neon tube lights up. Based on this, you can infer where the fault of the circuit may appear
Explain your reasons
So many, no one is right! Speechless

If only - the light doesn't work, the problem is that the zero line of the light switch is not connected firmly
If all the lights are not on, the problem is that the zero line on the main switch is not connected firmly
Although there is a live wire, the zero wire is not connected properly, so the circuit can not be formed. So the lamp is not on. But there is still electricity, which will make the neon tube glow

As shown in the figure, it is a schematic diagram of using the electric pen to distinguish the live line and the zero line in the home circuit. The correct use of the electric pen is ()
A. B. C. D.

A. B. when the pen tip contacts the wire to be detected, the hand contacts the metal body at the end of the pen. When the pen tip contacts the wire to be detected, the neon tube lights up the live wire and the neon tube does not light up the zero wire

You can distinguish the live line and the zero line in the home circuit with the electric pen. Why

If the zero line is grounded and measured with the electric pen, it is equivalent to measuring the earth. There is no response. The live wire has voltage. When it contacts, the current flows through the human body through the electric pen and flows to the earth

How to connect the switch, electrical appliance and socket to the live wire and zero wire in the home circuit
All left zero right fire?

The socket is left zero and right fire. It is left zero and right fire line
Switch over live line, zero line directly to the electrical appliances
If it is a three wire, then it will be grounded, the metal shell of electrical grounding
Don't know how to ask me, ha, I'm an electrician

If an electrical appliance is connected to a power supply with a certain voltage and a resistor is connected in series to reduce the voltage at both ends of the electrical appliance, the total power of the circuit is ()
A. It must be bigger than before. B. it must be smaller than before. C. It's as big as before. D. it may be bigger or smaller than before

After a resistor is connected in series, the total resistance of the circuit increases. According to the formula P = u2r, the total power of the circuit decreases

If there is another user in the primary coil of the transformer and the resistance is the same as that in the secondary coil, what is the power voltage current relationship between them

According to the principle of transformer: u Original: u vice = I vice: I original = n Original: n vice
And the resistance power is p = I2R. So p primary: P secondary = I primary 2R: I secondary 2R = I primary 2: I secondary 2 = n secondary 2: n primary 2. That is to say, the resistance power connected by multi turn coil is smaller
Because u = IR, the voltage ratio at both ends of the connected resistor is u Original: u pair = I original R: I auxiliary r = I Original: I auxiliary = n pair: N original, which is inversely proportional to the number of coil turns

In a series circuit, there are several consumers. Can their total power be divided by the square of the total voltage by the total resistance or multiplied by the square of the current by the total resistance

AAA can get P = u squared / R and P = I squared r according to P = UI and I = u / R

Is a power supply a device that provides electrical energy or voltage
as soon as possible

Power supply is a device to provide electric energy. There is a voltage between the two poles of the power supply. The power supply generates electricity by the voltage at both ends of the power supply. It drives the free charge in the external circuit to form a current, and converts the electric energy into other forms of energy by using electrical appliances. There is no power supply without voltage. For example, normal people have hands. People work by hands, and people's energy is converted out by hands

Is a power supply a device that provides electrical energy?

Power supply is the source of energy, of course, it can also provide voltage, but it not only provides electric energy, but also consumes some energy, such as generator

According to the principle of safe use of electricity, the fuse, switch and resistance wire of electric kettle are respectively connected to the live wire, ground wire and zero wire?