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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.
Centrifugal force with a liquid Get a small goldfish bowl or glass jar. Fasten a wire securely about the neck. To this wire attach a bale. Join the cord from the drill chuck to
A force of 2.5kN is needed to lift a load. How much work is done if the load is lifted by 500cm? An electromagnet exerts a force of 12N and moves a soft iron armature by a dist
Inductors: Coils which are used for their opposition to current change in a circuit are known as inductors or chokes. CONSTRUCTION Inductors with an air core have small
Electric current may be expressed in which one of the following units? a) coulombs/volt b) joules/coulomb c) coulombs/second d)
what is cyclotron
definition and explanation
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Free Expansion process: In free expansion of gas, the gases enlarge in vacuum. Thus, work done Δw=0 In free expansion if state changes from 1 → 2 only the initial and final s
The potential difference across the terminals of a cell when it is not supplying any current is known as it's emf.
Photomultiplier tube(PTM) it can detect a weak flash of light and estimate the amount of light .The principle of operation (fig(4)) a light photon released electron at the phot
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