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How is torque produced in a dc motor?
torque = force x Radius of the armature
A torque acting on an object tends to produce what?
A torque acting on an object tends to produce rotation.
What has magnets and coils of copper wire?
Some DC motors.
How does a large force produce a small torque and it is possible for a small force to produce a large torque?
Torque is the product of (force) x (distance from the center of rotation).So with a distance from the center that's large enough or small enough,any force can produce as much or as little torque as you want.
Can a force produce a torque when there is no lever arm?
no because to get a torque you must multiply lever arm by force. If lever is zero, then torque is zero
Why ac motors are not used in railways?
Ac motor has a low starting torque so that DC series motor used in railways cause DC motor has high starting torque
In what sense dc motor is better than ac motor?
DC motors can spin at a much faster speed and have higher starting torque.
Why DC motors and DC generators are commonly known as DC machines?
because the dc motor will act as dc generator as same as dc generator acts as a dc motor .so it is called as dc machines.AnswerBecause generators and motors are machines, and operate on d.c.'A.C. machines' are generators, transformers, and motors which operate on a.c.
Is torque and current proportional?
Sometimes, for example in a separately excited dc motor. But in a series-wound dc motor the torque is proportional to current-squared, which gives the motor a very high starting torque and this makes series motors very popular for traction.
Why will a dc motor produce v but not an ac motor?
Motors do not produce voltage, current, or power. They use them.they produce mechanical output.
Type of motor used by electric train?
dc series motors are used because of torque vs speed characteristics.
What is the best type of DC motor for use with DC?
Basically anything that works with batteries usually works with DC motors, i.g. your hard drive, your cellphone vibrator, toys, etc. Also, even for large motors, the DC motor has the advantage of being easily controlled by input voltage. Induction motors, on the other hand, can use controlled input voltage but they will have to deal wth low torque when the voltage is low. DC motors are used for those little fans in your computer. Also, CD players also use DC motors to spin the discs. DC motors are important where absolute speed control and feedback are necessary. For your household appliances, including fan motors, those are AC motors, cheaper for the industrial strength and more efficient.
Are DVD DC motors and DC motors same?
actually dc motors are of several types in which one of them are 1).brushed 2).brushless ...so the motor present in DVD are the brushless dc motors ...
Advantages of dc shunt motor?
it maintains a constant speed under varing load
Does a bar magnet exert a torque on itself due to its own magnetic field?
electric motors produce torque so in the sense yes
Why starter used in DC motors?
starter is used in dc motor to reduce the initial starting torque...so that the dc machine could be protected from damage.... ..and to avoid max ..current flowing ..from it it can damage whole ..moter structure
Are the fan motors on fanuc ac spindle motors ac or dc?
usually ac 110v even on the dc motors
