What is the power dissipated by a 10 ohm resistor with 20 V across it?
Therefore, the 10 ohm resistor uses half the power or 20 Watts.
What is the power dissipated in the 10 ohm resistor?
We can now calculate the power dissipated by each using P = I2R. For the 10 Ω resistor this is P10 = (12 A)2(10 Ω) = 1440 W. For the 7 Ω resistor this is P7 = (12 A)2(7Ω) = 1008 W.
What is the voltage across 10 ohm resistor?
Ohm’s Law says that the current I = V / R. The voltage across the whole circuit is 12 volts, and the total resistance is 10 ohms. The answer is I = 12 / 10 = 1.2 amperes.
What is the power dissipated in the 30 ohm resistor?
The dissipation across a 30 ohms resistor would be 2.7 watts.
What is the current across the 20 ohm resistor?
Explanation: I=V/R. Since in parallel circuit, voltage is same across all resistors. Hence across the 20 ohm resistor, V=200V so I=200/20=10A. Since all resistors are in parallel the voltage across each is 200 V.
What is the current through the 4 ohm resistor?
Hence, the current flowing through the resistor R1 (4 ohms) is 1A.
What applied voltage will cause A 20 Ω resistor to dissipate 5 watts?
V^2 = P x R = 5 x 20 = 100. Therefore V = 10 volts.
What is the power dissipated by the resistor?
The power dissipated by each resistor can be found using any of the equations relating power to current, voltage, and resistance, since all three are known. Let us use P=V2R P = V 2 R , since each resistor gets full voltage.
What is the current in the 30 ohm resistor?
1 Expert Answer So the current in the 30 Ω resistor is 2.00 amps.
How is power dissipated by a resistor related to current?
This correlation follows Ohm’s law, which states the formula for current as I (current) = V (voltage) ÷ R (resistance). In the field of electronics, power dissipation is also a measurement parameter that quantifies the releasing of heat within a circuit due to inefficiencies.
How many resistors in a series of 10 ohms?
First three resistors in series each 10 Ohms. = 15 ohms. = 45 ohms. Three resistors of 20 ohms, 40 ohm, and 50 ohm are connected in parallel across a 50v power source. What is the equivalent resistance of the set and the current in each resistor?
How much power is dissipated at 20 mA?
For a 500 Ohm load resistor, the power dissipated at 20 mA is 0.2 Watts. A good choice for the resistor’s power rating is at least 2 Watts because such a load will not heat up very much. Even at full loop current there won’t be a voltage change across the load resistor due to heat from power dissipation instead of actual loop current changes.
How to calculate the total resistance of a resistor?
Assuming you mean what fraction of the total current (the sum of the currents through each resistor) flows, the answer is 1/3. Derivation: we know that the total resistance Rs = 20 x 10 / (20 + 10) = 200/30 = 20/3 ohms. Assume an applied voltage of Vs = 20V.