Izibonelo ezi-6 zemibuzo yoMthetho ka-Ohm
Funda futhi izibonelo zomthetho ka-Ohm kanye nezinto zomthetho ka-Ohm .
1. Ithebula lokulinganisa umehluko ongaba khona kanye namandla kagesi
Ngokusekelwe kuthebula, ubudlelwano phakathi kuka-V, u-I, no-R...
A. Uma u-V emkhulu, u-I no-R abakhulu bahlala befana.
B. Inani lika-R lilingana no-I no-V
C. Inani lika-R liwumkhiqizo ka-V no-I.
D. Inani lika-I lilingana no-R futhi lilingana ngokuphambene no-V.
Ingxoxo
Ifomula yomthetho ka-Ohm:
V = IR noma R = V / I
Inani lokumelana kukagesi elisekelwe kudatha ethebulani yileli:
R 1 = V / I = 1,50 / 0,08 = 18,75 Ohms
R 2 = V / I = 2,80 / 1,50 = 2,87 Ohms
R 3 = V / I = 3,99 / 2,10 = 1,9 Ohms
Ngokusekelwe kuthebula, ubudlelwano phakathi kuka-V, u-I no-R buwukuthi inani lika-R lilingana ngokuphambene no-V no-I. Lokhu kusho ukuthi u-V no-I abakhulu, u-R omncane.
I-R ayiguquguquki, ngakho-ke idatha ethebuleni elingenhla ayichazi umthetho we-Ohm kodwa kunalokho ukumelana nogesi. Umthetho we-Ohm usebenza kuphela uma i-R inguguquguquki.
Ayikho impendulo efanele.
2. Ukusebenzisa ucingo oluyi-conductor olude kakhulu kusekethe kuzonciphisa ugesi. Lokhu kubangelwa...
A. ukumelana kuba kuncane
B. izithiyo ziba zinkulu
C. i-voltage iba nkulu
D. i-voltage iba ncane
Ingxoxo
Impendulo efanele ingu-B.
3. Yiliphi igrafu elibonisa ubudlelwano phakathi komehluko ongaba khona kanye nogesi wamanje?
Ingxoxo
Ubudlelwano phakathi komehluko ongaba khona kanye nogesi buboniswa yigrafu empendulweni A.
4. Qaphela ithebula elilandelayo lemiphumela yokuhlola. Ngokusekelwe kudatha engenhla, kungaphethwa ngokuthi amandla amanje...
I-A. ilingana ngokuphambene ne-voltage
B. ngokulingana ne-voltage
C. ilingana ne-voltage
D. ayithinteki yi-voltage
Ingxoxo
Ngokusekelwe kudatha esetafuleni, uma i-voltage iphakeme, kulapho i-current iba nkulu khona. Ngakho-ke, kungaphethwa ngokuthi i-current ilingana ngqo ne-voltage.
Impendulo efanele ingu-B.
5. Idivayisi inokumelana okungu-150 Ohm kanye nogesi ongu-2A odlula kuyo, ngakho-ke umehluko ongaba khona...
A. 3,0 Volt
B. 7,5 Volt
C. 75 Volt
D. 300 Volt
Ingxoxo
Kuyaziwa ukuthi:
Ukumelana (R) = 150 Ohm
Amandla kagesi (I) = 2 Ampere
Umbuzo: Umehluko ongaba khona noma i-voltage kagesi (V)
Impendulo:
Ifomula echaza ubudlelwano phakathi kwamandla kagesi, amandla kagesi kanye nokumelana kagesi:
V = IR
Imininingwane:
V = i-voltage kagesi, I = ugesi wamanje, R = ukumelana kagesi
Umehluko ongaba khona noma i-voltage kagesi:
V = IR = (2 Ampere)(150 Ohm) = 300 Volts
Impendulo efanele ngu-D.
6. Ugesi osengxenyeni yentambo yokumelana ingu-4 A. Uma zombili iziphetho zinikezwe amandla angu-12 Volts. Zingaki izithiyo?
A. 2 ohms
B. 3 ohms
C. 4 ohm
D. 5 ohms
Ingxoxo
Kuyaziwa ukuthi:
Amandla kagesi (I) = 4 Ampere
I-voltage kagesi (V) = 12 Volts
Umbuzo: Ukumelana kukagesi (R)
Impendulo:
Ifomula echaza ubudlelwano phakathi kwe-voltage kagesi, i-electrical current kanye nokumelana kagesi:
V = IR
Ukumelana kukagesi:
R = V / I = 12 Volts / 4 Amps = 3 Ohms
Impendulo efanele ingu-B.
Umthombo wombuzo:
Imibuzo Yokuhlolwa Kazwelonke Yesayensi Yesikole Samabanga Aphansi/Isikole SamaSulumane Samabanga Aphakeme
