NCERT Class 10 Science-Magnetic Effects of Electric Current[Magnetic Field Due to a Current-Carrying Conductor] [NCERT Based General Studies (GS)]: Questions 1 - 5 of 19

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Question 1

Question MCQ▾

When the core of solenoid is of hard steel the magnetic field is:

Choices

Choice (4)Response

a.

Strong and permanent magnet is produced

b.

Strong and acts as a electromagnet

c.

Strong and acts as strong magnet as long as current is flowing through it

d.

Question does not provide sufficient data or is vague

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Question 2

Question MCQ▾

Electromagnets are:

Choices

Choice (4)Response

a.

Winding a large number of turns of an insulated wire on a cylindrical soft iron core

b.

Temporary magnets

c.

Prepared by placing soft iron core in a solenoid

d.

All a., b. and c. are correct

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Question 3

Question MCQ▾

The magnetic lines of force around a straight conductor carrying electric current are:

Choices

Choice (4)Response

a.

Concentric circles with conductor at the centre

b.

Clockwise

c.

Concentric circles

d.

Anticlockwise

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Question 4

Question MCQ▾

Bar magnets are:

Choices

Choice (4)Response

a.

Permanent magnets

b.

Polarity of bar magnet can be changed

c.

Strength of a magnetic field can be changed

d.

All of the above

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Question 5

Question MCQ▾

Strength of the magnetic field produced by a current carrying circular coil is directly proportional to the:

Choices

Choice (4)Response

a.

Radius of the circular coil and number of turns of wire in circular coil

b.

Current flowing through a wire

c.

Radius of the circular coil and current flowing through it

d.

Current flowing though the coil and number of turns of wire in the circular coil

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