Short Circuit means the before-load voltage and the after-load voltage come in contact. One of the reasons could be the malfunction of a device. It can internally short the voltages. If the circuitary in a device gets damaged, or dust particles have landed on the circuit board in between the tracks, then it can definitely create a short. Short circuits then cause large currents to flow, which then, in result, trips the protection devices like fuses, MCBs, MCCBs, etc.





Fluctuations can happen due to problems at the generation side or also due to problems at load side. For eg, if you live besides lets say, a small scale factory, which runs a couple of motors. When these motors are started, they draw in large currents for a very brief time. This results in a sudden increase of load in your locality. This, in turn, causes a voltage fluctuation, mostly a voltage dip. You can sense that when the tube lights flicker. It can also happen in your homes when you suddenly start all major electrical appliances at your home, like Washing machine, microwave oven, water pump, etc.



Sudden rise in voltage can occur due to sudden decrease in load in your area.

as stated in the terminology, short circuit means bypassing the intended load. when circuitry connected to non-intended load; short circuit occurred. One wire loose then short circuit might be occurred.





Voltage fluctuation occurred when excessive rate current changing is occurred. then a dip (voltage fluctuation is happened). excessive rate current changing can be triggered from startign big load or fault such as short circuit bolting three phases.

Short circuiting can take place for MANY reasons.



Voltage fluctuations, also, can have many causes, including short circuiting somewhere.



You are going to have to explain your question further.

when contact between live and neutral wires in house wiring , short circuit will occur.

Bad currents njunk