EASY
7th Foundation
IMPORTANT
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Copper wires are used as connecting wires because

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Important Questions on Electric Current and its Effects

MEDIUM
7th Foundation
IMPORTANT
NSO Science Olympiad Workbook Grade 7>Chapter 13 - Electric Current and its Effects>EXERCISES>Q 16

Three bulbs A, B and C are connected as shown in figure. The bulbs B and C are identical. If the bulb C is fused, then

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EASY
7th Foundation
IMPORTANT
NSO Science Olympiad Workbook Grade 7>Chapter 13 - Electric Current and its Effects>EXERCISES>Q 17
Consider the following statements and select the correct option which correctly identifies true T and false F.
(i) Iron loses its magnetism easily.
(ii) Steel is a hard magnetic material.
(iii) Soft iron is used to make permanent magnet.
(iv) Steel is used to make electromagnet.
  (i) (ii) (iii) (iv)
(A) F F T T
(B) T T F F
(C) T F T F
(D) F T F T
HARD
7th Foundation
IMPORTANT
NSO Science Olympiad Workbook Grade 7>Chapter 13 - Electric Current and its Effects>EXERCISES>Q 18

Which of the following circuit diagram represents the given torch?

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EASY
7th Foundation
IMPORTANT
NSO Science Olympiad Workbook Grade 7>Chapter 13 - Electric Current and its Effects>EXERCISES>Q 19
The given options show four electromagnets. Which electromagnet is stronger than others?