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Electromotive force of a cell


Calculate the resistance and inductance given a frequency of 50hz, applied voltage of 240v, capacitance of 40*10^-6f and current of 1.5<-35

For a half-wave rectifier having diode voltage VD and supply input of VI, the diode conducts for π – 2Θ, where Θ is given by

a)tan -1 VD/VI

b)tan-1 VD/VI – VI

c)sin-1 VD/VI

d)sin-1 VD/VI – VI


A solid cube of metal 0.01m side is drawn into a uniform wire 3 m long. Calculate the
resistance of this wire. Resistivity of the material of the wire is 50 x 10-8Ωm
An object has a charge of -2. How many electrons must be removed so that the charge becomes +3
A 700 W lamp was connected to a supply that a 5A current was flowing through the lamp. What is that resistance of the lamp
Nichrome ribbon resistor elements each has a resistance of 1 ohm. The element is made from sheet of nichrome alloy, 0.025 cm thick. If the width of the ribbon is 0.3 cm, what length is required per element? Assume specific resistance of nichrme alloy to be 109

A capacitor is placed in series with a resistor, and a square wave is applied.


a. Sketch the RC response to the square wave

b. Sketch a second wave beneath a) where the product RC has been increased by a factor of 4


The resistance of 120 meters of wire is 16Ω. What is the conductance of the wire from one end
to the middle?
The resistance of 120 meters of wire is 16Ω. What is the conductance of the wire from one end to the middle?