Question

A 5.0 Ω resistor is connected in a circuit so that there is 12 V across it. (i) What current flows through the resistor? (ii) If the voltage is doubled to 24 V, how would this affect the current? (iii) What power is being dissipated by the resistor when the 12 V is applied across the ends?

(i) Describe the three types of nuclear radiations β or β+ particles and γ rays, including the penetrating power of each. b The isotope 20F has a half life of 11.0 s. If the initial sample has 100 000 of these nuclei, on average how many would exist 3 half lives later, at 33 s?

Answer 1

Current in resistance and power