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1
Q

Un circuit simplu este compus din..
Curentul electric este…

A

generator, fire de legatura, intrerupator si consumator

miscarea ordonata a sarcinilor electrice

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2
Q

sensul curentului este

A

de la borna pozitiva la cea negativa

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3
Q

Intensitatea are formula
si definitia….

A

I = q/t
Marimea fizica scalara egala cu raportul dintre sarcina electrica ce strabate conductorul si intervalul de timp in care are loc procesul

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4
Q

Intensitatea se masoara in

A

Ampere

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5
Q

Ce masoara intensitatea

A

Ampermetrul (in serie)

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6
Q

Tensiunea are formula
si definitia

A

U = L/q
Marimea fizica scalara egala cu raportul dintre lucrul mecanic efectuat pentru transportul unei sarcini intre doua puncte ale circuitului

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7
Q

Tensiunea se masoara in

A

Volti

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8
Q

Ce masoara tensiunea

A

Voltmetrul (in paralel)

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9
Q

Ce este Rezistenta R

A

Capacitatea unui conductor de a se opune trecerii curentului

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10
Q

R are formula

A

R = U/I

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11
Q

Deci alte doua formule pt I si U sunt

A

U = R*I I=U/R

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12
Q

formula pt rezistor

A

R = q*L/S

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13
Q

Deci q

A

q = R*S/L

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14
Q

Rezistenta se masoara in

A

Ohmi

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15
Q

Iar rezistivitatea se masoara in

A

Ohmi*m

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16
Q

Variatia rezistentei cu temperatura

A

R = R0* (1+alfa*t)

17
Q

alfa este

A

coeficient de temperatura al rezistivitatii

18
Q

alfa se masoara in

A

grade la -1

19
Q

Legea lui Ohm pentru o portiune de circuit este

A

I = U/R