. Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise. s dis-continuous, but it is in parallel with respect to the main circuit, when the latter is con-tinuous, that is, when the switch W is closed. If W be opened, the main circuit becomesdiscontinuous and S is changed from in parallel to in series connection. means that the circuit is not continuous but the ends are joinedto a condenser, as shown at the right
. Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise. s dis-continuous, but it is in parallel with respect to the main circuit, when the latter is con-tinuous, that is, when the switch W is closed. If W be opened, the main circuit becomesdiscontinuous and S is changed from in parallel to in series connection. means that the circuit is not continuous but the ends are joinedto a condenser, as shown at the right in fig. 1,326, so that no cur-rent can flow except into and out of the condenser. Ques. In circuits containing resistance and capacityupon what does the amount of lead depend? Ans. Upon the relative values of the resistance and thecapacity reactance. ALTERNATING CURRENT DIAGRAMS 1,085 Ques. Describe the action of a condenser when currentis applied. Ans. When the current begins to flow into a condenser, thatis, when the flow is maximum, the back pressure set up by thecondenser (called the condenser pressure) is zero, and when theflow finally becomes zero, the condenser pressure is a maximum. CONDENSER PRESSURE90°AHEAD OF THE CURRENT. Fig. 1,327.—Current and pressure curves showing that the condenser pressure is 90° aheadof the current. A current flowing into a condenser encounters a gradually increasingpressure which opposes it, beginning from zero pressure when the current enters at maxi-mum flow and increasing to the same value as the current pressure, at which time thecurrent ceases to flow. Hence, since the current varies from zero to maximum in onequarter period, or 90°, the phase difference between current and condenser pressure is condenser pressure reaching a positive maximum when the current starts from zeroon the positive wave, is 90° ahead of the current. Ques. What does this indicate? Ans. It shows that the phase difference between the waverepresenting t
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