Physics, 08.02.2021 14:00 Riley3833

3. Uma lâmpada foi ligada diretamente a uma pilha. Mediu-se a diferença de potencial nos extremos da pilha tendo-se obtido o valor 4,0 V. A intensidade de corrente na lâmpada é 0,5 A. 3.1. Tendo em conta que 1 ampére (A), a unidade de intensidade de corrente, corresponde à passagem de 1 coulomb (C) de carga por segundo, qual é a carga que passa em cada secção da lâmpada em 2 segundos?

3.2. Sabendo que a diferença de potencial eléctrico (em volts) indica a energia (em joules) transformada por cada coulomb de carga que passa na lâmpada, qual é a energia que esta recebe em 2 segundos?

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