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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.
For the square voltage waveform displayed on an oscilloscope shown in Figure, find (a) its frequency, (b) its peak-to-peak voltage.
Define the formula of Wien law. WIEN'S LAW: λ m T = constant Here: λ m = Peak Wavelength (m) T = Surface Temperature (K) Constant = 2.898 x 10 -3 mK It
What is the significance of negative work?
A current of 12A flows in the element of an electric fire of resistance 25?. Verify the power dissipated by the element. If the ?re is on for 5 hours every day, measure for a
A mild steel closed magnetic circuit has a mean length of 75mm and a cross-sectional area of 320.2mm 2 . A current of 0.40 a flows in a coil wound uniformly around the circuit
(1) The first practical application for piezoelectric devices was sonar, first developed during worldwar1. Piezoelectric materials are as a source of ultrasonic waves. At sea, they
It is the difference among potential at two points of a conductor. Please note that by potential(at a point A) ,we actually mean potential difference among point A and another
Explain why easier to pull a lawn roller than to push it? Explaination : In Pulling, effective weight of lawn mover= mg-fsinx In pushing, effective weight = mg+
What is Potential Gradient Magnitude of electric field at a point on an equipotential surface equal's rate of alter of potential, ΔV, with distance Δx, as point moves perpendic
A 350-Hz tuning fork is held over the end of a pipe that is inserted into water. What is the spacing between the resonance lengths of the pipe if the speed of sound is 348 m/s
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