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What does a commutater in an electric motor do?
It (1) provides a means of connecting a rotating coil to the external circuit, and (2) it is a rotating switch which ensures that the direction of the current through the coil always acts in the same direction relative to the magnetic field in order to ensure its torque acts in the same direction.
How does the 3-phase induction motor acts like 2-phase induction motor if a phase is disconnected from supply?
yes the motor will run but will draw more current and the torque will be not constant means not smooth due to unbalanced current
What is a counter EMF voltage?
Counter EMF (Electromotive Force) voltage is the voltage generated by an electric motor or generator that opposes the applied voltage when the device is in operation. It arises due to the motion of the conductor in a magnetic field, following Faraday's law of electromagnetic induction. This opposing voltage limits the current flowing through the motor or generator, helping to regulate its speed and efficiency. Essentially, counter EMF acts as a self-regulating mechanism in electrical machines.
How are coil in a motor and the coil in an electromagnet the same?
All (electrical) coils are the same, in that they are coils. All coils honor the same principles: investing electrical energy into a coil results in a magnetic field. Investing magnetic energy into a coil results in an electric current. But, different coils serve different purposes. For example, a coil in an electromagnet is used to magnify the magnetic field surrounding a wire that carries an electric current. This is typically aided by supplying a core made from a a ferromagnetic material; that is, a material which offers very little resistance to magnetism. In an electromagnet, the coil and its core is typically stationary (even though the entire contraption might move, as is the case with a crane at the scrapyard). Therefore, the coil in an electromagnet converts electrical energy into magnetic energy. The reversal of this process converts magnetic energy into electric energy, through a process known as induction. This is the case in dynamos, electric generators, and also in some electric motors. Some machines make use only of the conversion from electric to magnetic energy, as is the case with the electro magnet. This group includes some forms of electric motors and generators. Some machines make use only of the conversion from magnetic to electric energy, as is the case in the coil used to provide the ignition spark used with combustion engines. Some machines make use of both effects. This includes transformers, and many forms of electric generators and motors. For example, a stationary coil in an electric motor might supply a magnetic field which acts on the rotor. If the field in the stationary magnet itself rotates, as is for example the case with 3-phase electric power systems, this rotating magnetic field induces an electric current in the rotor. The rotor could itself be a coil, which in response to this induced current creates a magnetic field, pulled around by the rotating field of the stationary part. (This is in fact the principle behind the most common electrical motor, the short-circuit motor) Further uses of coils include that of (transient) energy storage: an electric current can build a magnetic field. When the current changes, the magnetic field also changes, and thus induces an electric current. This form of coils is frequently used in electronics to create filters; devices that suppress or select electric current according to its frequency. For example, your HiFi's loudspeakers contain a filter device that divides the electric signal from your amplifier into the higher frequency portions fit for your tweeter, and the lower frequency portions fit for your bass speaker.
Does the alternating current supplied to the armature winding of a DC motor gets converted to dc by a commutator before it flows through the armature coil of the DC motor?
The commutator is a rotating switch, which reverse the polarity of the generated voltage every half-cycle. So it acts to rectify the output voltage.
Do all magnets have a force that acts on moving electric charges?
yes,they do
A split metal ring that acts as a switch in an electric motor is called a?
commutator
What does the coil of wire do in a electric motor?
The coil of wire in an electric motor acts as the armature, generating a magnetic field when an electrical current passes through it. This magnetic field interacts with the motor's permanent magnets to produce rotational motion, which drives the motor's shaft.
What is the difference between electric force and magnetic force?
Electric force is the force between charged particles, while magnetic force is the force between magnetic poles or moving charges. Electric force acts on stationary charges, while magnetic force acts on moving charges. Both forces are fundamental in nature and play important roles in the interactions of particles and objects.
Why does a electric fan continue rotate for sometime even after the electric current is switched off?
An electric fan continues to rotate for some time after the electric current is switched off due to inertia. Inertia is the tendency of a moving object to continue moving until a force acts to stop it. The fan blades have rotational kinetic energy that keeps them moving even when the power is turned off.
What makes up the magentic field?
Magnetic fields are made up by a moving electric charge within which the force of magnetism acts:)
How does a standing fan work?
With an electric motor. A force acts on an electric current when it runs through a magnetic field (called the Lorentz Force) see: http://en.wikipedia.org/wiki/Electric_motor
How does regenerative braking work on an electric bike?
Regenerative braking on an electric bike works by converting the kinetic energy of the moving bike back into electrical energy. When the brakes are applied, the motor on the bike acts as a generator, slowing down the bike and converting the energy into electricity, which is then stored in the battery for later use. This helps to increase the bike's overall efficiency and extend its range.
What factors affect the drag force that acts on a high speed train?
The main factors that affect the drag force on a high-speed train include the train's speed, shape and design of the train, surface roughness of the train's exterior, and the air density through which the train is moving. Additionally, environmental conditions such as wind speed and direction can also impact the drag force.
What is the difference between magnetic force and electric force, and how do they compare in terms of their effects on charged particles?
Magnetic force is the force that acts on a moving charged particle in a magnetic field, while electric force is the force that acts on a charged particle due to the presence of an electric field. The main difference between the two is that magnetic force only affects moving charged particles, while electric force can act on both moving and stationary charged particles. In terms of their effects on charged particles, magnetic force can change the direction of the particle's motion, while electric force can change both the direction and speed of the particle. Additionally, electric force is typically stronger than magnetic force for most everyday situations.
Which frictiin refers to friction that acts on an object that is not moving?
Static friction refers to friction that acts on an object that is not moving, preventing it from sliding.
CENTRIPETAL?
A force that acts on a body moving in a circular path and is directed around the object which the body is moving
