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9. Definition - Power of accommodation, Elect10. Difference between Voltmeter & Ammeter.11 Richt hand thumble​

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Question 1: What is Power of Accommodation?

AnsWeR: Power of accommodation is the ability of our eye to change the FOCAL length of the eye crystalline lens. Due to this, the eye lens is able to SEE objects both from our eye and near to our eye.

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Question 2: Differentiate between Voltmeter and Ammeter.

AnsWeR:

\boxed{\begin{tabular}{c|c}\bf Voltmeter & \bf Ammeter\\\cline{1-2}Use to measure the voltage in the circuit &Use to measure the current in a circuit.\\\cline{1-2}Represented as an encircled V. & Represented as an encircled A.\\\cline{1-2}Voltmeter is always connected in parallel. & Ammeter is always connected in series.\end{tabular}}

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Question 3: What is right hand thumb rule ?

AnsWeR: It states that when the thumb is stretched out in the right hand towards the direction of the current in a straight current carrying conductor, the curly fingers represent the direction of magnetic FED. It is used to find out the direction of magnetic FIELD.

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