NSO Level 1- Science Olympiad (SOF) Class 10: Questions 666 - 669 of 986

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Question number: 666

» Light - Reflection and Refraction

Edit
MCQ▾

Question

The speed of light in an unknown medium is measured to be

What is the index of refraction of the medium?

Choices

Choice (4)Response

a.

0.12

b.

1.09

c.

2.1

d.

2.03

Question number: 667

» Magnetic Effects of Electric Current

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MCQ▾

Question

Read the given statements for properties of magnetic field and mark the correct option

Statement 1: The magnitude of magnetic field increases with increase in electric current and decreases with decrease in electric current

Statement 2: Magnetic field lines are always in series to each other

Choices

Choice (4)Response

a.

Statements 1 and 2 are correct

b.

Only statement 1 is correct

c.

Statements 1 and 2 are incorrect

d.

Only statement 2 is correct

Question number: 668

» Our Environment and Its Management

Edit
Match List-Ⅰ List-Ⅱ▾

Question

Match the traditional water harvesting system pf column I with the corresponding states in column II and select the correct option from the given below.

List-Ⅰ (Column I)List-Ⅱ (Column II)

(A)

Ooranis

(i)

Tamil Nadu

(B)

Dongs

(ii)

Assam

(C)

Virdas

(iii)

Arunachal Pradesh

(D)

Apatani

(iv)

Gujarat

Choices

Choice (4)Response
  • (A)
  • (B)
  • (C)
  • (D)

a.

  • (i)
  • (iv)
  • (iii)
  • (ii)

b.

  • (i)
  • (iii)
  • (iv)
  • (ii)

c.

  • (i)
  • (ii)
  • (iv)
  • (iii)

d.

  • (iv)
  • (ii)
  • (iii)
  • (i)

Question number: 669

» Sources of Energy

Edit
MCQ▾

Question

Arrange in correct order for working of solar cooker.

(i) When the solar cooker is kept in direct sunlight, the reflector (R) reflects both visible

(ii) Infrared rays get absorbed in the box, which increases its internal temperature up to about

(iii) The black surface of the box and the vessel absorbs it.

(iv) When the inner black surface becomes quite hot, it also starts radiating heat energy in the form of infrared rays, but the upper glass sheet does not allow these rays to pass through it and go outside the box

Choices

Choice (4)Response

a.

(iv), (ii), (i) and (iii)

b.

(i), (iii), (iv) and (ii)

c.

(ii), (iv), (i) and (iii)

d.

(iii), (i), (iv) and (ii)

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