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Resolvido
Qual é a intensidade de corrente i, que atravessa um circuito cujo resistência vale 20Ω sob ddp de 12 volts?
U U
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A
Resolvido
A curva característica de um resistor ôhmico está representada no diagrama: a) Qual é a resistência elétrica do resistor? Solução 5 ohm b) Em razão da resistência elétrica do circuito qual será a nova ddp quando percorrido por uma corrente de 2 ampère? Solução 10V
ddp
50
Então (a):
R=
U I
Onde:
R=
50V 10 A
U
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Resolva
Qual é a intensidade de corrente i, que atravessa um circuito cujo resistência vale 20Ω sob ddp de 12 volts?
Solução 0,6A
U
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Resolva
Um resistor que obedece a lei de OHM, tem resistência igual a 10 Ω, represente
num gráfico, a corrente elétrica i que percorrerá esse resistor em função da ddp aplicada no intervalo de 0 até 110 110 volts: Solução 11A ddp
110
U
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Resolva
Qual é a potência elétrica dissipada de um circuito, circuito, cujo ddp aplicada é igual a 12 V e intensidade de corrente elétrica 1,75 A?
Solução 21W
P
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Resolva
A potência elétrica total dissipada esquematizada vale 480 W sabendo que entre os terminais A e B está aplicada uma ddp de 120 volts, calcule: a) A inte intensi nsidad dade e de corr corren ente te na associ associaç ação; ão;
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Resolva
Dada a associação esquematizada abaixo determine: determine: a) A resi resist stênc ência ia equiv equivale alent nte e da assoc associaç iação; ão; solução 30 ohm b) A int intensid ensidade ade de corren corrente te elétric elétrica a da associaç associação; ão; solução 2A
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Resolva
Calcule a intensidade de corrente (i) e a resistência ( Ω) elétrica do circuito denominado abaixo:
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Resolva
Um circuito elétrico de 2400 watts, funciona 4 hora por dia durante 30 dias e consome energia elétrica em quilowatts-hora de:
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Resolva
30 - Um resistor de 4,0 Ω mais um resistor de 15 Ω e um resistor 10 Ω de são associados as sociados em misto e a nessa associação é aplicada uma d.d.p. de 100V . a) Qual a resis resistên tência cia equi equivale valent nte e da associação associação? ? b) Qual Qual a intensid intensidade ade de corrent corrente e elétrica elétrica da associaçã associação o equival equivalent ente? e? c) Qual Qual a potên potência cia elétr elétrica ica ada resis resis da associ associação? ação?