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A step down transformer has 600 turns in the primary coil. The input voltage is 120 V while the output voltage is 24 V. Determine the number of turns in the secondary coil.

Physics

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Huu hapa ni utatuzi wa maswali:

Swali la (c)(i): Eleza jinsi mikondo ya eddy inapunguzwa kwenye transfoma.

Mikondo ya eddy hupunguzwa kwa kutumia kiini kilichowekwa tabaka (laminated core). Kiini hiki huundwa na tabaka nyembamba za chuma zilizotenganishwa na nyenzo za kuhami umeme, ambazo huongeza upinzani wa umeme na hivyo kupunguza ukubwa wa mikondo ya eddy.

Swali la (c)(ii): Transfoma ya kupunguza voltage ina mizunguko 600 kwenye koili ya msingi. Voltage ya pembejeo ni 120 V wakati voltage ya pato ni 24 V. Bainisha idadi ya mizunguko kwenye koili ya pili.

  1. Tambua taarifa ulizopewa na fomula inayohusika.

    Tunajua idadi ya mizunguko ya msingi (NpN_p), voltage ya msingi (VpV_p), na voltage ya pili (VsV_s). Tunahitaji kupata idadi ya mizunguko ya pili (NsN_s).
    Np=600N_p = 600
    Vp=120 VV_p = 120 \, \text{V}
    Vs=24 VV_s = 24 \, \text{V}
    Fomula inayohusisha hizi ni:

    VpVs=NpNs\frac{V_p}{V_s} = \frac{N_p}{N_s}

  2. Panga upya fomula ili kupata NsN_s.

    Ns=Np×VsVpN_s = N_p \times \frac{V_s}{V_p}

  3. Badilisha namba kwenye fomula na ufanye hesabu.

    Ns=600×24 V120 VN_s = 600 \times \frac{24 \, \text{V}}{120 \, \text{V}} Ns=600×15N_s = 600 \times \frac{1}{5} Ns=120N_s = 120

  4. Toa jibu la mwisho.

    Idadi ya mizunguko kwenye koili ya pili ni 120\boxed{\text{120}}.

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