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If the output force is greater than the input force of a simple machine Is the mechanical advantage is less than one?
No, the mechanical advantage is greater than 1. If you input a force of 1 unit you get out a force of 1+ units. However keep in mind that if this were a PERFECT machine the amount of WORK INPUT is EQUAL to the the amount of WORK OUTPUT. Since perfection is not possible, and there are frictional losses this is not possible. Otherwise you could have a perpetual motion machine, which is not yet possible.
Why is difficult to increase the efficiency of a machine?
cheese
Why is it impossible for the output work of a machine to be greater than the machine's input work?
There are always energy losses within the machine due to inertia, friction, etc.
When energy in a transformation is lost where does it go?
There are usually losses in a machine such as a heat engine, where thermal energy is converted to mechanical energy. Losses occur in the cooling system which has to keep the machine at a suitable temperature for its component materials, ie the radiator in your car, the exhaust system which carries away quite a lot of thermal energy, and frictional losses in moving parts. In a power station where the turbine operates on the Rankine cycle most of the heat losses occur in the condenser where steam is condensed back to water to refeed the boilers. The rejected heat goes into the environment, either into the atmosphere via cooling towers or directly into a river, lake, or the ocean. In an aircraft engine the losses go directly into the atmosphere in the exhaust. Generally these losses are not recoverable because the rejected heat is at a low temperature or the vehicle is moving freely. However in some situations heat can be rejected at usable temperature and used for district heating etc.
Why is a machine is never 100 efficient?
Entropy. There are always losses - usually by friction.
Are the friction losses of the machine linear in induction motor electrical machines?
yes
What is the losses of three phase induction motors?
Iron Loss Copper Loss Frictional loss
What oil used in hydraulic bending machine?
to reduce frictional losses and increase lubrication
Why cant a machine be one hundred percent affective?
The reason why amachine cant be one hundred percent effective is as a result of losses.For Electrical machine such as alternator we have Mechanical losses(such as windage and frictional losses)and Electrical losses(such as copper loss in the rotor winding and stator winding).In Mechanical machine the main losses are windage and frictional losses.NOTE;ALL THIS LOSSES RESULT IN THE PRODUCTION OF HEAT,THUS REDUCING THE EFFICIENCY OF THE MACHINE.
What generates heat when the motor is running?
The frictional losses and the resistive losses generate heat in a motor
What are the various losses occurring in induction motors?
what are the various losses occurring in the motors
What are the losses have an induction machines?
A three phase induction machine have the Following losses:- 1. Stator core loss 2.Stator Ohmic loss 3.Rotor core loss 4.Rotor ohmic loss 5.Friction losses 6.windage losses 7.Stray losses 8.Also it'll depends upon the types of motor as if it is a slip ring type IM then it will have sparking losses at slip contact etc etc which are very small in comparison to above losses. Regards,,
The output line drawn in circle diagram of induction motor is used to find the variable losses and what are other uses of circle diagram?
the circle diagram of induction motor is used to find the losses and efficiency of induction motor
What is the combination of winding losses and self induction is referred to as?
Impedence
Core loss of an induction motor?
Just like a transformer, the core losses are a combination of eddy current losses and hysteresis losses.
What did means by the stray losses in induction motors or transformer or generator?
Stray losses refer to secondary voltage to be inappropriately distributed to transformers, induction motors and generators. Stray losses essentially mean that there is leakage that causes a weakening of the voltage being delivered to the motor.
Why the efficiency of induction motor is less than that of transformer?
Because, the losses of IM is more due to the contribution of friction losses at shaft bearings and wind age losses in rotor air gap, this reduces the efficiency of the equipment, Since transforms is a static equipment zero mechanical loss so efficiency of the equipments in high .
