NSTSE (National Science Talent Search Exam- Unified Council) Class 6: Questions 1904 - 1910 of 2029

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Question 1904

Question

MCQ▾

A new substance with new properties is always formed in change.

Choices

Choice (4)Response

a.

Chemical

b.

Periodic

c.

Irresistible

d.

Question does not provide sufficient data or is vague

Question 1905

Question

MCQ▾

Which type of electromagnet is used in calling bell?

Choices

Choice (4)Response

a.

Horse shoe electromagnet

b.

Circular shaped electromagnet

c.

L shaped electromagnet

d.

I shaped electromagnet

Question 1906

Question

MCQ▾

How many types of Lever are we used?

Choices

Choice (4)Response

a.

Four

b.

Three

c.

Six

d.

Two

Question 1907

Question

MCQ▾

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

b.

Electromagnet

c.

One bar magnet

d.

Three bar magnet

Question 1908

Question

MCQ▾

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

b.

5 N

c.

5000 N

d.

50 N

Question 1909

Question

MCQ▾

Which of the following factors can affect the strength of an electromagnet?

Choices

Choice (4)Response

a.

Strength of current

b.

Nature of core material

c.

Number of turns of coils

d.

All a., b. and c. are correct

Question 1910

Question

MCQ▾

The efficiency of an ideal machine is:

Choices

Choice (4)Response

a.

100 %

b.

80 %

c.

90 %

d.

92 %

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