Turn on thread page Beta
    • Thread Starter
    Offline

    3
    ReputationRep:
    a 100uf capacitor and a 8 ohms resistor are connected in series, the supply is AC, the frequency is 100Hz. a current of 8 amps (RMS) flows in the circuit. Determine :
    (a) active power in the circuit,
    (b) reactive power
    (c) apartment power

    this is how I was planning on solving this problem:
    1. get total impedance of the circuit
    2. get voltage of the circuit using the impedance and current .
    3. get active power by using VIcos(°)

    is my approach correct?
    Posted on the TSR App. Download from Apple or Google Play
    Offline

    19
    ReputationRep:
    (Original post by Kmachakanja1)
    a 100uf capacitor and a 8 ohms resistor are connected in series, the supply is AC, the frequency is 100Hz. a current of 8 amps (RMS) flows in the circuit. Determine :
    (a) active power in the circuit,
    (b) reactive power
    (c) apartment power

    this is how I was planning on solving this problem:
    1. get total impedance of the circuit
    2. get voltage of the circuit using the impedance and current .
    3. get active power by using VIcos(°)

    is my approach correct?
    You need to use the appropriate formulas for apparent power, reactive power as well as active power. You have been given all the required values necessary to calculate things like voltage etc.

    I can't remember exactly it's been a little while but I believe for some of those equations you'll need to use peak values not RMS values.
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: November 4, 2017

University open days

  • University of East Anglia (UEA)
    Could you inspire the next generation? Find out more about becoming a Secondary teacher with UEA… Postgraduate
    Thu, 18 Oct '18
  • University of Warwick
    Undergraduate Open Days Undergraduate
    Sat, 20 Oct '18
  • University of Sheffield
    Undergraduate Open Days Undergraduate
    Sat, 20 Oct '18
Poll
Who is most responsible for your success at university

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.