Question

an inductor of reactance 4ohm and resisistance 3ohm arw connected in series with 100volt ac supply find wattless current in circuit​

Answer 1

Answer:

Explanation:

Potential difference = equivalent resistance × induced current

Given: V=100 volt,

Req=4+3=7 ohm

V=IF

100=I×7

I=100/7

therefore current in circuit is 100/7 ampere

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Answer 2

The wattless current in the circuit is 16 amperes.

Given,

An inductor of reactance 4ohm and resistance 3ohm are connected in series with the 100-volt ac supply.

To Find,

The wattless current in the circuit.

Solution,

The formula for calculating the wattless current is

Wattless current = I rms*sinΦ

Now,

Z = √(3²+4²) = √25 = 5 Ω

Now,

I rms = Vrms/Z = 100/5 = 20 amperes

Now,

cosΦ = R/Z = 3/5

So,

sinΦ = 4/5

Now,

Wattless current = 20*4/5 = 16 amperes

Hence, the wattless current in the circuit is 16 amperes.

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