If two resistors R1 = 10 ohm and R2 = 15 ohm are connected in series, the ratio of power consumed by the two resistors P1: P2 is______ The maximum current allowed to pass through the two resistors is 1 A and 0.6 a respectively. When they are used in series, the maximum voltage allowed to be applied at both ends is______ V

If two resistors R1 = 10 ohm and R2 = 15 ohm are connected in series, the ratio of power consumed by the two resistors P1: P2 is______ The maximum current allowed to pass through the two resistors is 1 A and 0.6 a respectively. When they are used in series, the maximum voltage allowed to be applied at both ends is______ V

(1) ∵ R1 and R2 are connected in series, and the currents are equal everywhere, P1: P2 = i2r1: i2r2 = R1: R2 = 10 Ω: 15 Ω = 2:3; (2) the maximum allowable current is I ′ = 0.6A, and the maximum allowable voltage at both ends is u = I ′ (R1 + R2) = 0.6A × (10 Ω + 15 Ω) = 15V

The fixed resistance R1 and R2 are connected to the power supply, R1 = 40 Ω, R2 = 20 Ω. The current passing through R1 is 0.2 A. what is the power of R1 and R2?

U=IR1=40×0.2=8（V）
P1=U^2/R1=8^2/40=1.6（W）
P2=U^2/R2=8^2/20=3.2(W)

When the resistance marked with 100 Ω 4W and 100 Ω 25W are connected in series, the maximum resistance allowed to increase is 40V,

Let 100 Ω 4W be R1100 Ω 25W be R2
According to P = UI = u ^ 2 / R
Then u = √ (p * r), because the power of R1 is less than R2, only R1 is calculated
Get the maximum voltage at both ends of R1: U1 = √ (4 * 100) = 20 (V)
At the same time, the maximum current at both ends of R1 is obtained: I1 = 20 / 100 = 0.2A
When R1 and R2 are connected in series, the maximum current does not change, then the total voltage is:
U total = IR total = 0.2 * (100 + 100) = 40V
Therefore, the maximum voltage allowed to increase is 40 v. if the voltage is higher, R1 will burn out due to over rated power

Two resistors with 100 ohm resistance and power of 4W and 12 ohm resistance and power of 8W are respectively connected in series. The maximum voltage they bear is

P1 = I1 ^ 2r1 = I1 = 0.2A
P2 = I2 ^ 2r2, I2 = 0.8A
In order to ensure that the two lamps are not damaged in series, the maximum current can only be I1
Umax=I1*(R1+R2)=0.2*(100+12)V=22.4V

What is the function of power supply for the circuit? What is the function of voltage?

Electricity provides voltage for the circuit. The function of voltage is to make the circuit form potential difference and make the electrons move in direction to form current

Is lithium battery a power source or an electrical appliance

In general, it is regarded as power supply, but strictly speaking (or it can be considered that it is an electrical appliance in the process of charging and a power supply in the process of discharging

Is the output current of 12V battery related to power supply or electrical appliances? Why
I use the converter to convert it into 5V to charge the mobile phone, but I don't know the output current. If the current is too high, I'm afraid it's bad for the mobile phone

The output current of 12V battery is related to the power supply. The user is just a load. Determine what type of battery you need according to your user

Is the lithium battery used for mobile phones electrical or power? Why?

When charging: convert electric energy into chemical energy, which is equivalent to energy storage device; when discharging, convert chemical energy into electric energy, which is equivalent to power supply

Rechargeable batteries can only be used as power supply, not electrical appliances. Is that right

No, when a rechargeable battery is charged, for a charger, it is an electrical appliance

Why are batteries and generators power sources rather than electrical appliances

Electrical appliance generally refers to all electrical appliances. From a professional point of view, it mainly refers to the electrical devices, equipment and components used to connect and disconnect the circuit, transform the circuit parameters, and realize the control, adjustment, switching, detection and protection of the circuit or electrical equipment, It mainly refers to some electrical equipment commonly used in families to provide convenience for life, such as TV, air conditioner, refrigerator, washing machine, various small household appliances, etc
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