3. to the load cell (one or

3. The Working principle of Electronic Weight Scale Electronic weight scale are equipped with electronic measuring modules. The electronic weighing scales operate based on the following principle: the force exerted by the load situated on the balance pan is transmitted to the load cell (one or more) which in turn emits an electric signal whose intensity is proportional with the force. The electrical signal is picked up by the electronic balance block, processed, amplified and transmitted to a digital display system (digital mass indicator), the result representing the weight of the mass located on the load pan.

A very common solution is to use strain gauges (strain-sensitive transducers). These are generally used for commercial weighing devices with low resolution. The strain gauges are wired as a Wheatstone-bridge to balance for temperature changes .When the pan is not loaded by any object all four resistors are the same and the input of the amplifier is zero. When an object is placed on the pan R4 and R1 are compacted and their resistance decreasing, R2 and R3 are strained and their resistance is increasing.

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This becauses a voltage difference at the input of the amplifier, proportional to the weight of the object. The strain gauges are wired as a Wheatstone-bridge to compensate for temperature changes .1 : Spring body 2 : Weighing pan3 : Mounting plate (housing) 4 : Placing and wiring of the strain gauges (R3 and R4 can also be placed on the under side of the beam)The advantages of electronic/digital weight scale are the plain fact that digital scales are considerably effortless to read.

Besides, electronic weight scale will give more precision of reading value. Here are some disadvantages to electronic/digital scales, most likely the very regular one being incorrect readings. Several people have criticising that when they stand on the scale at one spot and obtain a reading and when they get back after few seconds they get a different reading altogether. Commonly , digital scales are good but it wil be worn after a regular used. This instrument need to calibrate after years to get better accuracy.

3.1 through between birth to their adulthood.

3.1 Describe theories in relation to:The Early Years Practitioner plays a big role in helping children hone their attitude and skills. There are several theories in relation to child development.

* Cognitive developmentThe Cognitive Theory is focused on the development of the thought process of an individual. This is the development where we start to understand things around us and become more aware of what is happening.John Piaget is one of the most successful theorists that focused on Cognitive Development which discussed different stages in a person’s intellectual development. According to him, there were 4 stages an individual goes through between birth to their adulthood.The theory explains that a human being acquire a step by step process in learning things in life. Piaget believed that it is a learning progress for an individual to adapt everything on their surroundings.

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It is a collective process where in an individual absorbs things around her and creates an impact on his/her development.* Speech, language and communication developmentThe speech, language and communication development of a child consists of three aspects, these listening ; attention, understanding and speaking. These aspects are very important in the early years stage of a child. The speech, language and communication development are important factors that greatly affects the outcome of an individual on things such as social relationships, education, behaviour and life chances.

B F Skinner who developed the Behaviourist Approach suggested that people learned things as a result of an occurred event. Despite the extensive study on this theory, there are still some critiques who questioned Skinner on his theory.* Physical developmentThe Physical Development of a child comes from different factors such as outdoor play, mind games, physical activities, dressing up, plays and interactions. These factors help an individual develop their character and physique together with their strengths and skills.

This development is a very important aspect in a child’s development because it creates an impact in the later success of a person.


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