NSO Science Olympiad Workbook Grade 7>Chapter 13 - Electric Current and its Effects>EXERCISES>Q 14

EASY

7th Foundation

IMPORTANT

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Which of the following diagrams represents a short circuit?

77.78% studentsanswered this correctly

Important Questions on Electric Current and its Effects

EASY

7th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 7>Chapter 13 - Electric Current and its Effects>EXERCISES>Q 15

Copper wires are used as connecting wires because

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?