Ravi Barwad, Author at Polytechnic Hub

Difference between drift current and diffusion current

Drift current Diffusion current Under the action of electric field the charge carriers in the semiconductor material stops moving randomly and start drifting towards or away the applied electric field…

Ravi Barwad October 21, 2014

Electrical Articles

Application and advantages of sensors

Sensor Advantages Disadvantages Applications Limit Switch sensors High Current Capability Low Cost Familiar “Low-Tech” Sensing Requires Physical Contact with Target Very slow response Contact bounce Interlocking Basic End-of-Travel sensing Photoelectric…

Ravi Barwad October 17, 2014

Electrical Articles

Difference between AC Servo Motor and DC Servo Motor

Following are main difference between AC servo motor & DC servo motor A.C. Servo Motor D.C. Servo Motor Low power output of about 0.5 W to 100 W. Deliver high…

Ravi Barwad October 15, 2014

Electrical Articles

Power Factor Correction

Capacitive Power Factor correction is applied to circuits which include induction motors as a means of reducing the inductive component of the current and thereby reduce the losses in the…

Ravi Barwad October 13, 2014

Electrical Articles

Features for different types of circuit breakers

Factor Oil Breaker Air Breaker Vacuum/SF6 Safety In oil breaker circuit risk of explosion and fire due to increase in pressure during multiple operations In air breaker emission of hot…

Ravi Barwad October 12, 2014

Electrical Articles

Difference between Shunt Capacitor and Series Inductor Filter

Following are the difference between shunt capacitor and series inductor filter: Parameter Shunt Capacitor Series Inductor Place of filter Across the load In series with load Useful in Reducing ripple…

Ravi Barwad October 10, 2014

Electrical Articles

Difference between Synchronous Motor and Induction Motor

Synchronous Motor Induction Motor Synchronous motor construction is complicated. Induction motor construction is simpler, particularly in case of cage rotor. This is Not self starting. This is self Starting Separate…

Ravi Barwad October 2, 2014

Electrical Articles

How to find Amp (Amperes) in ac and dc

E = Voltage I = Amps PF = Power Factor Eff = Efficiency HP = Horsepower Formula for finding Amperes when Horsepower is known in direct current (dc) and alternative…

Ravi Barwad September 29, 2014

Electrical Articles

Difference between BJT And JFET

BJT JFET Unipolar device (current conduction is only due to one type of majority carrier either electron or hole). Bipolar device (current condition, by both types of carriers, i.e. majority…

Ravi Barwad September 25, 2014

Electrical Articles

Types of Transformers Based on the Value of K

Transformation Ratio (K) The transformation ratio for voltage is defined as the ratio of secondary voltage to the primary voltage of a transformer. It is denoted by K. Turns Ratio…

Ravi Barwad August 18, 2014