NSO Level 1- Science Olympiad (SOF) Class 8: Questions 780 - 784 of 1175

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Question 780

Question

MCQ▾

Here are some suggestions to minimize fluid friction. Pick out the incorrect ones

Choices

Choice (4)Response

a.

To giving streamlining shape

b.

Increasing the speed of moving object

c.

Increasing the density of fluid

d.

Increase weight of objects

Question 781

Question

MCQ▾

Magnetic force is

Choices

Choice (4)Response

a.

Contact force

b.

Non-contact force

c.

Question does not provide sufficient data or is vague

d.

None of the above

Question 782

Question

MCQ▾

Friction of a surface depends upon

Choices

Choice (4)Response

a.

Roughness of the surface

b.

Smoothness of the surface

c.

Inclination of the surface

d.

All a., b. and c. are correct

Question 783

Question

MCQ▾
Figure Shown the Magnet and Its Pols

Two magnets are arranged as shown in figure. The effect of force here is

Choices

Choice (4)Response

a.

Attraction

b.

Repulsion

c.

Charging

d.

Question does not provide sufficient data or is vague

Question 784

Question

MCQ▾

Here are some statements about frictional force. Pick out the correct ones.

Choices

Choice (4)Response

a.

It always acts opposite to the direction of motion

b.

It always depends on the nature of the surfaces in contact

c.

Both a. and b. are correct

d.

Question does not provide sufficient data or is vague

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