Which resistor dissipates radiates more power?
It depends on if your power supply is constant voltage or constant current. Usually, it’s the former, so it means that the P=V2/R is the more appropriate one to use. Therefore, a smaller resistor will dissipate more power in this situation.
How many 330 Ω resistors in parallel are required to carry 20 a on a 220 V line?
30 , resistors of 330 ohm resistance in parallel are required to carry 20 ampere and 220 volt.
How many resistors do I need for 88 Ohm?
Answer. Therefore, 4 resistors of 88Ω ( in parallel) are required to carry 10 A on a 220 V line.
How many 88 ohm resistors in parallel are required to carry 5 A on a 440v line?
Hence, four resistors are required. Was this answer helpful?
What is the total resistance of N resistors?
This implies that the total resistance in a series is equal to the sum of the individual resistances. Therefore, for every circuit with N number of resistors connected in series: RN(series)=R1+R2+R3+… +RN.
How can we find the total resistance?
If you know the total current and the voltage across the whole circuit, you can find the total resistance using Ohm’s Law: R = V / I. For example, a parallel circuit has a voltage of 9 volts and total current of 3 amps. The total resistance RT = 9 volts / 3 amps = 3 Ω.
What will be the total resistance of a circuit if’n resistors of resistance R are connected in parallel?
Likewise, if three or more resistors each with the same value are connected in parallel, then the equivalent resistance will be equal to R/n where R is the value of the resistor and n is the number of individual resistances in the combination. The equivalent resistance will therefore be: RT = R/n = 100/6 = 16.7Ω.
What is mean by resultant resistance?
A circuit composed solely of components connected in series is known as a series circuit.The total resistance of resistors in series is equal to the sum of their individual resistances. That is, Rtotal=R1+R2+R3.
What happens to the resultant resistance?
Since resistance is directly proportional to the length of the conductor, hence, in this case the resistance will decrease to half.
In which case the resultant resistance is less?
The reciprocal of the combined resistance of a number of resistances connected in parallel is equal to the sum of the reciprocals of all the individual resistances. The resultant resistance is less than either of the individual resistances.
What is the difference between equivalent resistance and resultant resistance?
Effective resistance is another name given to the impedance. Impedance is a property, which changes with the frequency of the signal. Equivalent resistance is defined to a set of resistors or components having resistance only. The effective resistance can be defined to each component of a circuit.
What happens to resistance if length is halved?
From the equation, we understand that resistance is directly proportional to the length of the conductor and inversely proportional to the crossectional area of the conductor. Doubling the length doubles the resistance.
How is the resistance of a wire affected if the length is doubled?
(a) Resistance of a wire is directly proportional to the length of a wire; so if the length is doubled, resistance is also doubled. (b) Resistance of a wire is inversely proportional to the area of cross-section the wire. Thus, if radius is doubled, area increases four times and hence the resistance becomes one-fourth.