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In home circuit, what is the connection between fuse and electrical appliances? Mixed couplet or cross couplet The voltage of home circuit is 220 V, can fuse divide some voltage? So the voltage of electrical appliances is not 220 V?
If the fuse you asked is in the trunk of the circuit, it should be mixed connection, that is to say, all electrical appliances are connected in parallel and then connected in series with the fuse
If the fuse is only for a consumer, it should be in series
In fact, the voltage of the home circuit only fluctuates around 220 V, and the fuse will not affect the operation of the electrical appliances
Is the fuse usually connected in series with the consumer in the home circuit or with the power supply, that is, in the trunk road?
A fuse is actually a section of wire, but it is made of special material with high resistivity and low melting point. When the circuit breaks down and the current increases, the fuse will blow, which is equivalent to the wire being disconnected from the middle. The fuse is connected in series with the electrical appliance, and the electrical appliance is connected in parallel
In a 220 V micro power appliance, there is a 105 ℃ 1 a temperature fuse. Can the fuse prevent the appliance from spontaneous combustion in case of accident?
Yes
Because this 105 degree refers to the current through the fuse temperature, at most 105 degrees will blow
Do 110 V electric appliances and 220 V parallel connection light up normally in 220 V circuit?
No, only u rated = u is actually normal
That is to say, only the one with 220 V lights normally! The one with 110 V will burn out
RELATED INFORMATIONS
- 1. For non pure resistance circuit, can p = UI be used to calculate electric power? Why? P = u / R? Isn't P = UI a universal formula? Is it OK?
- 2. What is the actual power of a 220 V, 44 w appliance used in a 110 V circuit
- 3. If there is a 20 ohm resistor and the power consumed within 30 minutes is 1 kW. H, what is the current through the resistor
- 4. The resistance of a conductor is 2 Ω. How many joules of heat are generated in one minute when the current is 2A?
- 5. The maximum current that a resistance wire can pass is 2A. When a voltage of 36V is applied to it, the current passing through is 0.5A______ (fill in "can" or "can't") used in 220 V circuit
- 6. In the circuit shown in the figure, the resistance value of resistance R1 is 15 Ω, the resistance value of resistance R2 is 10 Ω, and the current through resistance R1 is 0.2 a
- 7. Resistor R1 and R2 are connected in series in the circuit, the voltage at both ends of R1 is 3V, the voltage at both ends of R2 is 9V, R1 + R2 = 600 Ω (1) total current and voltage (2) current in the circuit (3) resistance value of resistance R1 and R2
- 8. In the circuit as shown in the figure, the resistance R1 = 8ohm, R2 = 10ohm, the supply voltage and the resistance of the constant resistance R are unknown. When the switch S is connected to 1, the current representation is 0.2 When the switch S is connected to 2, the possible value of current expression number is between () a and () A. please explain the analysis process, There is no way to send the figure. It is like this: when the switch is connected to 1, the resistance R1 is in series with the constant resistance R; when the switch is connected to 2, the resistance R2 is in series with the constant resistance R. in both States, the ammeter is in series with the constant resistance
- 9. 6. In the circuit shown in Figure 2, the internal resistance of the power supply can not be ignored. It is known that the setting resistance R1 = 10 Ω, R2 = 8 Ω. When the single pole double throw switch S is placed in position 1
- 10. In the circuit shown in the figure, R1 = 20 Ω, the total resistance of the circuit is 12 Ω, and the current representation is 0.3A. Please calculate: (1) resistance value of resistance R2; (2) power supply voltage; (3) current through R2
- 11. Three resistors are all 10 megohm in parallel. What is the total equivalent resistance?
- 12. What happens when the resistance is 0? If the resistance in the circuit is a few ohm, according to Ohm's law, will the current increase?
- 13. How many ohms is the resistance of the lamp marked with pz220-100? If it is connected to a 110V circuit, how many watts is the actual power?
- 14. A light bulb is printed with "PZ & nbsp; 220 & nbsp; & nbsp; 40". How much resistance does it have when it works normally? If it is connected to a 110V circuit, what is the actual power consumption?
- 15. A and B bulbs are respectively marked with the words "220 V 40 W" and "220 V 60 W", which are connected in parallel with the 220 V power supply. What is the resistance of B
- 16. 60W / 220V AC incandescent lamp is connected with diodes in series, and then connected with 220V AC power supply, the power consumption is ()
- 17. How to connect the 100W, 60W and 40W bulbs with the rated voltage of 110V in the circuit with the power supply voltage of 220V to make the bulbs light normally? Draw the circuit diagram and explain the reason with simple calculation
- 18. After a 110V, 100W light bulb is connected in series with a 100V, 40W light bulb, it can be connected to the 220V circuit to judge whether the problem is right or wrong
- 19. Resistor R1 and R2 are connected in parallel in the circuit. The voltage applied at both ends is 24 v. if R1 is 80 Ω, the current through R2 is 0.2 a, and R2 is calculated?
- 20. The resistance values of the two resistors are R1 = 8 ohm and R2 = 4 ohm. If they are connected in series with a 24 V power supply, the voltage at both ends of R1 is (), the voltage at both ends of R2 is (), and the total current of the circuit is Please explain the method,