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1. A carbon resistor of 47 k ohms is to be marked in the colour code . Write the sequence of colours . 2. A toaster produces more heat than a light bulb when connected in parallel to the 220 V mains . Which of the two has greater resistance ? 3. A 0- 50 … Continue reading A few problems from Current electricity
Ac changes its direction frequently and therefore the ordinary ammeter which is just a galvanometer with a shunt, tends to respond to the magnitude and direction of the instantaneous values of current and in effect it will not show any deflection. Ac is measured using hot wire ammeter, which is based on the heating effect … Continue reading Why ordinary ammeter cannot measure AC?