NSTSE (National Science Talent Search Exam- Unified Council) Class 6: Questions 1905 - 1912 of 2029
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Question number: 1905
» Chemistry » Separation of Substances
Question
Which type of electromagnet is used in calling bell?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Horse shoe electromagnet |
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| b. | Circular shaped electromagnet |
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| c. | L shaped electromagnet |
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| d. | I shaped electromagnet |
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Question number: 1906
Question
How many types of Lever are we used?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Four |
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| b. | Three |
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| c. | Six |
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| d. | Two |
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Question number: 1907
» Chemistry » Separation of Substances
Question
An electric current flowing in the wire produces magnetic field around it. It was proved with the help of
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Magnetic compass |
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| b. | Electromagnet |
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| c. | One bar magnet |
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| d. | Three bar magnet |
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Question number: 1908
Question
If the mechanical advantage of a device is 20 and load is 1000 N the effort will be:
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 500 N |
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| b. | 5 N |
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| c. | 5000 N |
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| d. | 50 N |
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Question number: 1909
» Chemistry » Separation of Substances
Question
Which of the following factors can affect the strength of an electromagnet?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Strength of current |
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| b. | Nature of core material |
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| c. | Number of turns of coils |
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| d. | All a. , b. and c. are correct |
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Question number: 1910
Question
The efficiency of an ideal machine is:
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 100 % |
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| b. | 80 % |
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| c. | 90 % |
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| d. | 92 % |
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Question number: 1911
Question
In which of the following class of lever fulcrum is in middle?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Class III |
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| b. | Not Mentioned |
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| c. | Class II |
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| d. | Class I |
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Question number: 1912
Question
If the efficiency of a machine is , Mechanical Advantage is 5 and load is then calculate the effort
Choices
| Choice (4) | Response | |
|---|---|---|
| a. |
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| b. |
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| c. |
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| d. |
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