NSO Level 1- Science Olympiad (SOF) Class 10: Questions 770 - 773 of 986

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Question number: 770

» Magnetic Effects of Electric Current

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MCQ▾

Question

A constant current flows in a horizontal wire in the plane of the paper from east to west as shown in figure. The direction of magnetic field at a point will be north to south.

The direction of magnetic field

The Direction of Magnetic Field

Choices

Choice (4)Response

a.

At a point located in the plane of the paper on the north side of the wire

b.

At a point located in the plane of the paper on the south side of the wire

c.

Directly above the wire

d.

Directly below the wire

Question number: 771

» Metals and Non - Metals

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MCQ▾

Question

Which of the not an oxide ore of iron?

Choices

Choice (4)Response

a.

Hematite

b.

Siderite

c.

Magnetite

d.

Pyrite

Question number: 772

» Sources of Energy

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MCQ▾

Question

The minimum wind speed for windmill to serve as a source of energy is

Choices

Choice (4)Response

a.

b.

c.

d.

Question does not provide sufficient data or is vague

Question number: 773

» Magnetic Effects of Electric Current

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Match List-Ⅰ List-Ⅱ▾

Question

Match column I and column II and select the correct option from the codes given below.

List-Ⅰ (Column I)List-Ⅱ (Column II)

(A)

Galvanometer

(i)

Reverses the direction of flow of electric current

(B)

Split ring commutator

(ii)

Electromagnetic induction

(C)

Electrical generator

(iii)

Convert an AC generator into a DC generator

(D)

Commutator

(iv)

Detect the presence of a current in a circuit

Choices

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

a.

  • (iv)
  • (iii)
  • (ii)
  • (i)

b.

  • (iv)
  • (ii)
  • (iii)
  • (i)

c.

  • (i)
  • (iii)
  • (iv)
  • (ii)

d.

  • (ii)
  • (iv)
  • (iii)
  • (i)

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