1.To find the resistance of a resistor, various currents were passed through the resistor and the corresponding voltage drops across it were measured. The results obtained were
(a) Draw to a suitable scale the graph connecting these quantities, with current values horizontal, and from the graph estimate the resistance value. (b) One serious reading error has been made; estimate what the voltage reading should be.
2.A resistor R is measured by the ammeter-and-voltmeter method, as in Figure 11.51. The ammeter and voltmeter readings are shown on the figure and the resistance of the voltmeter is 400_. Find the apparent and the true values ofR.