Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > In the principle of phase controla)the load i... Start Learning for Free
In the principle of phase control
- a)the load is on for some cycles and off for some cycles
- b)control is achieved by adjusting the firing angle of the devices
- c)control is achieved by adjusting the number of on off cycles
- d)control cannot be achieved
Correct answer is option 'B'. Can you explain this answer?
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In the principle of phase controla)the load is on for some cycles and ...
Switching devices is so operated that the load gets connected to ac source for a part of each half cycle.
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In the principle of phase controla)the load is on for some cycles and ...
Principle of Phase Control
The principle of phase control is a technique used to vary the amount of power delivered to a load by adjusting the firing angle of the devices used in the circuit.
Control by Adjusting Firing Angle
The control is achieved by adjusting the firing angle of the SCR (Silicon Controlled Rectifier) or TRIAC (Triode for Alternating Current) devices. These devices are used to control the power delivered to the load by switching on and off the supply voltage at a particular point in each cycle of the AC waveform.
Load On and Off Cycles
The load is on for some cycles and off for some cycles in phase control. The duration of the on and off cycles depends on the firing angle of the devices. The longer the device is on, the more power is delivered to the load. By controlling the firing angle, the amount of power delivered to the load can be varied.
Control Cannot be Achieved by Adjusting Cycles
Control cannot be achieved by adjusting the number of on-off cycles. The number of cycles in a waveform is fixed and cannot be changed. However, the duration of each cycle can be changed by adjusting the firing angle of the devices.
In conclusion, the principle of phase control is a powerful technique used to control the amount of power delivered to a load. The control is achieved by adjusting the firing angle of the devices, which in turn controls the duration of the on and off cycles of the load.
The principle of phase control is a technique used to vary the amount of power delivered to a load by adjusting the firing angle of the devices used in the circuit.
Control by Adjusting Firing Angle
The control is achieved by adjusting the firing angle of the SCR (Silicon Controlled Rectifier) or TRIAC (Triode for Alternating Current) devices. These devices are used to control the power delivered to the load by switching on and off the supply voltage at a particular point in each cycle of the AC waveform.
Load On and Off Cycles
The load is on for some cycles and off for some cycles in phase control. The duration of the on and off cycles depends on the firing angle of the devices. The longer the device is on, the more power is delivered to the load. By controlling the firing angle, the amount of power delivered to the load can be varied.
Control Cannot be Achieved by Adjusting Cycles
Control cannot be achieved by adjusting the number of on-off cycles. The number of cycles in a waveform is fixed and cannot be changed. However, the duration of each cycle can be changed by adjusting the firing angle of the devices.
In conclusion, the principle of phase control is a powerful technique used to control the amount of power delivered to a load. The control is achieved by adjusting the firing angle of the devices, which in turn controls the duration of the on and off cycles of the load.
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In the principle of phase controla)the load is on for some cycles and off for some cyclesb)control is achieved by adjusting the firing angle of the devicesc)control is achieved by adjusting the number of on off cyclesd)control cannot be achievedCorrect answer is option 'B'. Can you explain this answer? for Electrical Engineering (EE) 2026 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about In the principle of phase controla)the load is on for some cycles and off for some cyclesb)control is achieved by adjusting the firing angle of the devicesc)control is achieved by adjusting the number of on off cyclesd)control cannot be achievedCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the principle of phase controla)the load is on for some cycles and off for some cyclesb)control is achieved by adjusting the firing angle of the devicesc)control is achieved by adjusting the number of on off cyclesd)control cannot be achievedCorrect answer is option 'B'. Can you explain this answer?.
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