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Electric Motor:
A device, which converts electric energy into mechanical energy is known as Electric Motor.
Factors on which the speed of Rotation of Motor Depends:
The speed of rotation of motor depends on the following factors.
1. Magnitude of current passing by the motor.
2. Strength of magnetic field.
3. Number of turns in the coil of the motor.
4. Permeability of its armature.
A longitudinal wave with a frequency of 34 Hz takes 1.0 s to travel the length of a 2.5 m Slinky (see the figure). Determine the wavelength of the wave. λ = ( )m
The electric field strength, defined as a force per unit charge, has the units Newton per coulomb, N/C. The formula for electric potential difference, ΔV = Ed, though, suggest
when is the body said to be at rest
Electric Field: The electrical field because of a charge can be described as the space around the charge.
Factors on which Magnetic Force Depends: The magnetic force depends on following factors: 1. Nature of Pole: Like poles repel each other and unlike pole attract each other.
Rydberg constant (Rydberg): A constant that governs the relationship of the spectral line features of an atom by the Rydberg formula. For hydrogen, it is about 1.097 x 10 7 m
Instantaneous velocity and speed are explained at a certain instant and are shown by
A drunkard is walking along a straight road.he takes 5 steps forward and 3 steps backward and so on.each step is one meter long and takes one second.there is a pit on the road 11 m
A 250V, 50Hz single-phase supply feeds the following loads (i) incandescent lamps taking a current of 10A at unity power factor, (ii) fluorescent lamps taking 8A at a power
Construction: A motor require essentially a rectangular coil called armature a permanent magnet, a device called commutator to reverse the direction of current and a source of ele
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