Work Sheet: Measuring Devices

please use the  comment box below for discussion of any problem , query or for any concept understanding . If you want to download the worksheet ,Measuring devices

Q1 .Comment if this is a correct way of measuring resistance of a bulb using Ohm meter. If no , than explain the right procedure

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Q2. Lets sat the bulb in the above diagram is fixed, and cannot be moved or detached. Is there any way that we can calculate the current.

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Q3. Can only using Ohm Meter, we can determine if the bulb is fuse or not

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Q4. Find Whats wrong in the Circuit

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Q5. What Value will Millimeter will show on display and why

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Q6. What value will be shown by ohm meter , if we directly connect a voltmeter to it?

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Q7. Determine what these four voltmeters (A, B, C, D) will register when connected to this circuit in the following positions (assume a battery voltage of 3 volts):

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Q8. Determine what values will be shown by the voltmeter if the switch is opened in above picture

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Q9. Why are their different ranges on a voltmeter. What is their purpose

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Q10, Why does Ammeter use a fuse and why does voltmeter don’t have one

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Q11. Why Voltmeter is showing wrong reading

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Q 12. What will be the Value show by the Ohmmeter, if ammeter is connected to it

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Q13. Why is it dangerous to connect a ammeter directly to power supply

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Question 14 : In the following circuit the switch is off, but still the bulb is on. The fact is further elaborated by an ammeter showing that electrons are flowing in the circuit. How is it possible , that with a switch in off position , circuit can still be operational

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Question 15. If I connect two ammeter with the following circuit. Which ammeter will show greater value of current and why