Question

резистори опорами 400 і 800 Ом приєднали послідовно та приєднали до джерела струму.порівняйте потужножності струму в резисторах

Answer 1

Ответ:

При послідовному з'єднанны - струм однаковий в обох резисторах

Тоді потужності

P1=I^2*R1

P2=I^2*R2

P1/P2=I^2*R1/(I^2*R2)=R1/R2=800/400 = 2 рази

У 2 рази більша потужність виділяється на резисторі R1=800 Ом

Объяснение:

Answer 2

Calculation of Current and Power in Series Resistors

To compare the current and power in resistors with resistances of 400 Ω and 800 Ω connected in series, we can use Ohm's Law and the power formula.

According to Ohm's Law, the current flowing through a resistor is equal to the voltage across the resistor divided by its resistance. In a series circuit, the current is the same throughout all the components.

Let's assume that the current flowing through the resistors is I.

The power dissipated in a resistor can be calculated using the formula: P = I^2 * R, where P is the power, I is the current, and R is the resistance.

Now, let's calculate the current and power in the resistors:

1. Current Calculation: - Since the resistors are connected in series, the current flowing through both resistors is the same. - Let's assume the current flowing through the resistors is I. - According to Ohm's Law, the voltage drop across each resistor can be calculated using the formula: V = I * R, where V is the voltage and R is the resistance. - The voltage drop across the 400 Ω resistor is V1 = I * 400. - The voltage drop across the 800 Ω resistor is V2 = I * 800. - Since the resistors are connected in series, the total voltage across both resistors is the sum of the individual voltage drops: V_total = V1 + V2. - The current flowing through the resistors can be calculated using Ohm's Law: I = V_total / (400 + 800).

2. Power Calculation: - The power dissipated in each resistor can be calculated using the formula: P = I^2 * R. - The power dissipated in the 400 Ω resistor is P1 = I^2 * 400. - The power dissipated in the 800 Ω resistor is P2 = I^2 * 800.

Let's summarize the calculations:

- The current flowing through the resistors is I = V_total / (400 + 800). - The power dissipated in the 400 Ω resistor is P1 = I^2 * 400. - The power dissipated in the 800 Ω resistor is P2 = I^2 * 800.

Please note that the exact values of the current and power cannot be determined without knowing the voltage across the resistors or the total voltage of the circuit. If you provide additional information, we can calculate the values for you.