Yuav ua li cas koj txiav txim siab rhiab heev ntawm ammeter?
Yuav ua li cas koj txiav txim siab rhiab heev ntawm ammeter?

Video: Yuav ua li cas koj txiav txim siab rhiab heev ntawm ammeter?

Video: Yuav ua li cas koj txiav txim siab rhiab heev ntawm ammeter?
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Anonim

Qhov tsawg dua qhov tam sim no, qhov ntau " rhiab heev "cov ammeter . Piv txwv li, ib ammeter nrog qhov siab tshaj tam sim no nyeem ntawm 1 milliampere yuav muaj a rhiab heev ntawm 1 milliampere, thiab ntau dua rhiab heev dua ib ammeter nrog kev nyeem ntawv siab tshaj plaws ntawm 1 ampere thiab a rhiab heev ua 1 amper.

Tsis tas li ntawd, koj yuav ua li cas xam qhov rhiab heev ntawm voltmeter?

Voltmeter rhiab heev yog qhia nyob rau hauv ohms ib volt (W / V). Nws yog qhov tsis kam ntawm lub voltmeter ntsuas nyob rau hauv tag nrho-scale nyeem nyob rau hauv volts. Txij li thaum voltmeter cov kuj tsis hloov nrog txoj hauj lwm ntawm tus pointer, tag nrho cov kuj ntawm lub 'meter' yog tus rhiab heev multiplied los ntawm tag nrho-scale voltage nyeem ntawv.

Tsis tas li ntawd, dab tsi yuav yog qhov rhiab heev ntawm voltmeter rau 0 txog 50mA meter txav? Kev piav qhia: rhiab heev ntawm voltmeter yog lub reciprocal ntawm tag nrho scale deflection ntawm tam sim no. Ntawm no tam sim no deflection yog muab los ntawm 0 rau 50mA thiab rhiab heev yog 20ohm/V.

Ntxiv rau qhov no, dab tsi yog siv los tso cai rau ammeter los ntsuas qhov sib txawv?

Los ntawm kev ntxiv qhov ntsuas thib ob rau lub ntsej muag ntawm lub 'meter', tam sim no tuaj yeem nyeem ncaj qha. Los ntawm kev ntxiv ob peb shunt resistors nyob rau hauv cov ntaub ntawv ' meter ', nrog rau kev hloov mus xaiv qhov xav tau resistor, lub ammeter yuav muaj peev xwm ntsuas ob peb txawv siab tshaj tam sim no nyeem los yog thaj tsam.

Tam sim no rhiab heev yog dab tsi?

Tam sim no rhiab heev yog qhov ntsuas ntawm kev teb ntawm ib qho cuab yeej rau kev hloov ntawm tam sim no dhau ntawm nws. Qhov hluav taws xob rhiab heev yog qhov ntsuas ntawm kev teb ntawm ib qho cuab yeej rau kev hloov pauv ntawm qhov siv hluav taws xob thoob plaws nws.

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