A battery of emf and internal resistance is connected to a resistor. If the current in the circuit is , what is the resistance of the resistor? What is the terminal voltage of the battery when the circuit is closed?
Three resistors and are combined in parallel. If the combination is connected to a battery of emf and negligible internal resistance, determine the current through each resistor, and the total current drawn from the battery.
At room temperature the resistance of a heating element is What is the temperature of the element if the resistance is found to be given that the temperature coefficient of the material of the resistor is
A negligibly small current is passed through a wire of length and uniform cross-section , and its resistance is measured to be . What is the resistivity of the material at the temperature of the experiment?
A heating element using nichrome connected to a supply draws an initial current of A which settles after a few seconds to a steady value of What is the steady temperature of the heating element if the room temperature is ? Temperature coefficient of resistance of nichrome averaged over the temperature range involved is