Class 10th Science Chapter – 12 Magnetic Effect of Electric Current MCQ With Answers

September 18, 2023

Class 10th Science Chapter – 12 Magnetic effect of electric current MCQ With Answers

Textbook	NCERT
Class	10^th
Subject	Science
Chapter	12^th
Chapter Name	Magnetic effect of electric current
Category	Class 10th Science
Medium	English
Source	Last Doubt

Class 10th Science Chapter – 12 Magnetic effect of electric current MCQ With Answers In This Chapter we will learn about What is flux called, Is flux positive or negative, What is the formula for flux, Can flux be negative, Why is magnetic flux zero, Is flux scalar or vector, What is Tesla equal to, What is meant by Lenz law, What is zero magnetic, What is called non-magnetic, What is called magnetic, What is zero Gauss, What are the 4 types of magnets, What are the 7 types of magnets, What is the old name of magnet, Who is the father of magnet, Which is strongest magnet, Who made the first magnet, Who named magnets, What is the world’s first magnet, Are 2 magnets stronger than 1, Who said Earth is a magnet, How old is a magnet, Who is the biggest magnet in the world and more such things for more knowledge about this Chapters read their.

Class 10th Science Chapter – 12 Magnetic effect of electric current MCQ With Answers

Chapter – 12

Magnetic effect of electric current

MCQ

(1) A vertical wire carries a current upward. The magnetic field north of the wire will be directed ?

A. Upward.
B. Eastward.
C. Westward.
D. Northward.

Answer – (C) Westward.

(2) The magnetic field at a distance r from a long wire carrying current I is 0.4. Tesla. The value of magnetic field at a distance 2r is ?

A. 0.2 T
B. 0.1 T
C. 0.15 T
D. 1 T

Answer – (A) 0.2 T

(3) The effective length of the magnet is ?

A. The complete length of the magnet.
B. The distance between the two poles of the magnet.
C. The half of the length of the magnet.
D. The square of the length of the magnet.

Answer – (B) The distance between the two poles of the magnet.

(4) Magnetic field due to a current through a straight conductor depends on ?

A. Current.
B. Distance from the wire.
C. Both A. and B.
D. Cross-sectional area of wire.

Answer – (C) Both A. and B.

(5) Which of the following correctly describes the magnetic field near a long straight wire ?

A. The field consists of straight lines perpendicular to the wire.
B. The field consists of straight lines parallel to the wire.
C. The field consists of radial lines originating from the wire.
D. The field consists of concentric circles centred on the wire.

Answer – (D) The field consists of concentric circles centred on the wire.

(6) A ship is to reach a place 8c south of west. In what direction should the ship be steered if declination at the place is 18c west ?

A. West of magnetic south at angle 64c.
B. East of magnetic north at angle 64c.
C. West of magnetic south at angle 50c.
D. East of magnetic north at angle 18c.

Answer – (A) West of magnetic south at angle 64c.

(7) Which of the following is not true ?

A. Induction precedes attraction.
B. We cannot isolate a single pole.
C. We can magnetise an iron ring.
D. A permanent magnet retains its magnetism even when heated on a flame.

Answer – (D) A permanent magnet retains its magnetism even when heated on a flame.

(8) Which of the following processes will not produce new magnetic poles ?

A. Cutting a bar magnet in half.
B. Turning on a current in a solenoid.
C. Running a current through a straight wire.
D. Placing an iron rod in contact with a magnet.

Answer – (C) Running a current through a straight wire.

(9) By removing the inducing magnet, the induced magnetism is ?

A. Finished after some time.
B. Finished just after.
C. Not finished for a long time.
D. Not changed.

Answer – (B) Finished just after.

(10) A positively-charged particle (alpha-particle) projected towards west is deflected towards north by a magnetic field. The direction of magnetic field is ?

A. Towards south
B. Towards east.
C. Downward.
D. Upward.

Answer – (D) Upward.

(11) To avoid risk of electrical shock, which phenomena is used ?

A. Over loading.
B. Short circuiting.
C. Earthing.
D. None of these.

Answer – (C) Earthing.

(12) Which of the following determines the direction of magnetic field due to a current carrying conductor ?

A. Faraday’s laws of electromagnetic induction.
B. Fleming’s left-hand rule.
C. Lenz’s rule.
D. Maxwell’s cork screw-rule.

Answer – (D) Maxwell’s cork screw-rule.

(13) Which one of the following substances is the magnetic substances ?

A. Mercury.
B. Iron.
C. Gold.
D. Silver.

Answer – (B) Iron.

(14) A small magnet is placed perpendicular to a uniform magnet field. The forces acting on the magnet will result in ?

A. Rotational motion.
B. Translatory motion.
C. No motion at all.
D. Translational and rotational motion both.

Answer – (A) Rotational motion.

(15) Which of the following statement is not correct about two parallel conductors carrying equal currents in the same direction ?

A. Each of the conductors will repel each other.
B. The two conductors will repel each other.
C. The are concentric lines of force around each conductor.
D. Each of the conductors will move if not prevented from doing so.

Answer – (B) The two conductors will repel each other.

(16) Who has stated the Right hand Thumb Rule ?

A. Orsted.
B. Fleming.
C. Einstein.
D. Maxwell.

Answer – (A) Orsted.

(17) Magnetic lines do not intersect on one-another because ?

A. They are at a distance.
B. They are in the same direction.
C. They are parallel to another.
D. At the point intersection there will be two direction of the magnetic force which is impossible.

Answer – (D) At the point intersection there will be two direction of the magnetic force which is impossible.

(18) The magnetic lines of force, inside a current carrying solenoid, are ?

A. Along the axis and are parallel to each other.
B. Perpendicular to the axis and equidistance from each other.
C. Circular and they do not intersect each other.
D. Circular at the ends but they are parallel to the axis inside the solenoid.

Answer – (A) Along the axis and are parallel to each other.

(19) When the bars of bismuth are placed between the magnetic poles they set their length ?

A. Perpendicular to the lines of force.
B. Along the lines of force.
C. Neither perpendicular nor along the lines of force.
D. In any direction.

Answer – (A) Perpendicular to the lines of force.

(20) Force on a current carrying conductor in a magnetic field depends on ?

A. Direction of the current.
B. Direction of magnetic field.
C. Both A. and B.
D. Length of the wire.

Answer – (C) Both A. and B.

(21) Commercial electric motors do not use ?

A. An electromagnet to rotate the armature.
B. Effectively large number of turns of conducting wire in the current carrying coil.
C. A permanent magnet to rotate the armature.
D. A soft iron core on which the coil is wound.

Answer – (C) A permanent magnet to rotate the armature.

(22) The factors on which one magnetic field strength produced by current carrying solenoids depends are ?

A. Magnitude of current.
B. Number of turns.
C. Nature of core material.
D. All of the above.

Answer – (D) All of the above.

(23) The strength of magnetic field inside a long current carrying straight solenoid is ?

A. More at the ends than at the centre.
B. Minimum in the middle.
C. Same at all points.
D. Found to increase from one end to the other.

Answer – (C) Same at all points.

NCERT Solution Class 10th Science All Chapters MCQ

Chapter 1 – Chemical Reactions and Equations

Chapter 2 – Acids, Bases, and Salts

Chapter 3 – Metals and Non-Metals

Chapter 4 – Carbon and Its Compounds

Chapter 5 – Life Processes

Chapter 6 – Control and Coordination

Chapter 7 – How Do Organisms Reproduce

Chapter 8 – Heredity

Chapter 9 – Light reflection and refraction

Chapter 10 – Human eye and colorful world

Chapter 11 – Electricity