What is the expression for the self-induced fem in a solenoid with a changing current over time? The self-induced fem in a solenoid is directly pr...
What is the expression for the self-induced fem in a solenoid with a changing current over time?
The self-induced fem in a solenoid is directly proportional to the rate of change of the current over time (∆I/∆t) multiplied by a constant (L).
The constant L is called inductance and is determined by the geometry of the circuit.
The inductance of a solenoid is given by the formula L = µ0N2A/l.
The inductance is the resistance that opposes an element of the circuit to the change of the electric current in the solenoid.
a) Only statements I and II are correct.
b) Only statements II and III are correct.
c) Only statements II, III, and IV are correct.
d) All statements are correct.
The self-induced fem in a solenoid is directly proportional to the rate of change of the current over time (∆I/∆t) multiplied by a constant (L).
The constant L is called inductance and is determined by the geometry of the circuit.
The inductance of a solenoid is given by the formula L = µ0N2A/l.
The inductance is the resistance that opposes an element of the circuit to the change of the electric current in the solenoid.
a) Only statements I and II are correct.
b) Only statements II and III are correct.
c) Only statements II, III, and IV are correct.
d) All statements are correct.
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Ed 
A expressão para a força eletromotriz autoinduzida em um solenoide com uma corrente variável ao longo do tempo é dada por ∆Φ/∆t = -L(∆I/∆t), onde ∆Φ/∆t representa a taxa de variação do fluxo magnético, L é a indutância do solenoide e ∆I/∆t é a taxa de variação da corrente. Portanto, a alternativa correta é a letra b) Apenas as afirmações II e III estão corretas.
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