Home
Class 12
PHYSICS
A coil has an inductance of 0.7 H and is...

A coil has an inductance of 0.7 H and is joined in series with a resistance of 220 ohm. Find the wattless component of current in the circuit, when an alternating e.m.f. of 220 V at a frequency of 50 Hz is supplied to it.

Text Solution

Verified by Experts

Here, `L = 0.7 H, R = 220 Omega`
`E_(v) = 220 V, v = 50 Hz`
`X_(L) = omega L = 2 pi v L = 2 pi xx 50 xx 0.7 = 220 Omega`
`I_(v) = (E_(v))/(sqrt(R^(Z) + X_(L)^(2))) = (220)/(sqrt(220^(2) + 220^(2))) = (1)/(sqrt2) A`
`tan phi = (X_(L))/(R) = (220)/(220) = 1, phi = 45^(@)`
Wattless component of current `= I_(v) sin phi`
` = (1)/(sqrt2) sin 45^(@) = (1)/(2) = 0.5 A`
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION & ALTERNATING CURRENT

    PRADEEP|Exercise Solved Examples (b)|1 Videos

  • ELECTROMAGNETIC INDUCTION & ALTERNATING CURRENT

    PRADEEP|Exercise Short Answer Qusetions|2 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    PRADEEP|Exercise Exercise|191 Videos

  • ELECTROMAGNETIC WAVES

    PRADEEP|Exercise II Focus multiple choice question|5 Videos

Similar Questions

Explore conceptually related problems

A coil has an inductance of 0.5 H is connected in series with a resistance of 50 Omega to 240 V, 50 Hz AC. The maximum current in the circuit is

A coil has a iductance of 0.7H and is joined in series with a resistance of 220 Omega . When an alternating emf of 220V at 50 cps is applied to it, then the wattless component of the current in the circuit is (take 0.7 = 2.2)

A coil has an inductance of 0.7H and is joined in series with a resistance of 220Omega .When an alternating emf of 220V at 50cps is applied to it,then the wattles component of the current in The circuit is (take 0.7 pi=2.2 )

A coil has an inductance of 0.7 H and is joined in series with a resistance of 220 Omega . When an alternating e.m.f of 220 V at 50 c.p.s. is applied to it, then the wattless component of the current in the circuit is

A coil has an inductance of 22/pi H and is joined in series with a resistance of 220 Omega .When an alternating e.m.f of 220 V at 50 c.p.s is applied to it.then the wattless component of the rms current in the circuit is

A coil has inductance of (11)/(5pi)H and is joined in series with a resistance of 220Omega . When an alternating emf of 220V at 50Hz is applied to it, then the wattless component of the current in the circuit is

A 220 V , 50 Hz ac source is connected to an inductance of 0.2 H and a resistance of 20 ohm in series. What is the current in the circuit

A coll has an inductance of (2.2)/(pi)H and is joined m series with a resistance of 220Omega . When an alternating e.m.f. of 220 V at 50 c.p.s. is applied to it, then the wattless component of the runs current in the circuit is

A coil has an inductance of 0.1 H and resistance 12Omega It is connected to 220 V, 50 Hz line. Find the impedance, power factor and power.