Electrical Engineering ⇒ Topic : Alternating Voltage and Current
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| Sachin
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Alternating Voltage and Current A voltage which changes its polarity at regular intervals of time is called an alternating voltage. When an alternating voltage is applied in a circuit, the current flows first in one direction and then in the opposite direction; the direction of current at any instant depends upon the polarity of the voltage. Fig. (a) shows an alternating voltage source connected to a resistor R. In Fig. a (i), the upper terminal of alternating voltage source is positive and lower terminal negative so that current flows in the circuit as shown in Fig. 11.1 (i). After some time (a fraction of a second), the polarities of the voltage source are reversed [See Fig. a (ii)] so that current now flows in the opposite direction.This is called alternating current because the current flows in alternate directions in the circuit figure (a) | |
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| Sachin
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Alternating Voltage and Current A voltage which changes its polarity at regular intervals of time is called an alternating voltage. When an alternating voltage is applied in a circuit, the current flows first in one direction and then in the opposite direction; the direction of current at any instant depends upon the polarity of the voltage. Fig. (a) shows an alternating voltage source connected to a resistor R. In Fig. a (i), the upper terminal of alternating voltage source is positive and lower terminal negative so that current flows in the circuit as shown in Fig. 11.1 (i). After some time (a fraction of a second), the polarities of the voltage source are reversed [See Fig. a (ii)] so that current now flows in the opposite direction.This is called alternating current because the current flows in alternate directions in the circuit figure (a) | |
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| Sachin
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Alternating Voltage and Current A voltage which changes its polarity at regular intervals of time is called an alternating voltage. When an alternating voltage is applied in a circuit, the current flows first in one direction and then in the opposite direction; the direction of current at any instant depends upon the polarity of the voltage. Fig. (a) shows an alternating voltage source connected to a resistor R. In Fig. a (i), the upper terminal of alternating voltage source is positive and lower terminal negative so that current flows in the circuit as shown in Fig. 11.1 (i). After some time (a fraction of a second), the polarities of the voltage source are reversed [See Fig. a (ii)] so that current now flows in the opposite direction.This is called alternating current because the current flows in alternate directions in the circuit figure (a) | |
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