Updated on April 27, 2023
by Tiwari Academy
by Tiwari Academy
Class 10 Science Chapter 12 MCQ (Multiple Choice Questions) of Magnetic Effects of Electric Current. All MCQs are important for exams as well as school tests. Practice with these objective questions to score more in your terminal exams or unit tests. These MCQs includes almost all questions from intext questions and exercises questions. Answers and explanation of each MCQ is given along with the questions.
Class 10 Science Chapter 12 MCQ Online Test
| Class: 10 | Science |
| Chapter: 12 | Magnetic Effects of Electric Current |
| Contents: | MCQ Online Tests with Answers |
| Session: | CBSE 2024-25 |
Class 10 Science Chapter 12 MCQ with Answers for 2024-25
Class 10 Science Chapter 12 MCQ Online Test with answers are given here to provide a perfect practice to the all students of grade 10. All the answers are taken from NCERT Books for class 10 science only. There are about 75 questions divided in sets of questions. If a user need more practice, click on the button “Start a New Test” given at the end of last question.
Q1
A strong bar magnet is placed vertically above a horizontal wooden board. The magnetic lines of force will be:
[A]. Only in horizontal plane around the magnet
[B]. Only in vertical plane around the magnet
[C]. In horizontal as well as in vertical planes around the magnet
[D]. In all the planes around the magnet
Q2
The magnetic field lines produced by a bar magnet:
[A]. Originate from the south pole and end at its north pole
[B]. Originate from the north pole and end at its east pole
[C]. Originate from the north pole and end at its south pole
[D]. Originate from the south pole and end at its west pole
Q3
The strength of magnetic field inside a long current carrying straight solenoid is
[A]. More at the ends than at the center
[B]. Minimum in the middle
[C]. Same at all points
[D]. Found to increase from one end to the other
Q4
The magnetic field lines:
[A]. Intersect at right angles to one another
[B]. Interest at an angle 45° to each another
[C]. Do not cross one another
[D]. Cross at an angle of 60° to one another
Q5
A D.C. generator is based on the principle of:
[A]. Electrochemical induction
[B]. Electromagnetic induction
[C]. Magnetic effect of current
[D]. Heating effect of current
Q6
The strength of the magnetic field between the poles of an electromagnet would be unchanged if:
[A]. Current in the electromagnet winding were doubled
[B]. Direction of current in electromagnet winding were reversed
[C]. Distance between the poles of electromagnet were doubled
[D]. Material of the core of electromagnet were changed
Q7
Consider the following statements and choose the correct one:
[A]. A magnet is an object which attracts piece of iron steel Nickel and Cobalt.
[B]. Magnetic effect of electric current means that an electric current flowing in a wire produces a magnetic field around it.
[C]. The end of a a freely suspended magnet which points towards the north direction is called the north pole of the magnet
[D]. All the above
Q8
Which of the following statement is or are correct?
[A]. The space surrounding a magnet in which magnetic force is exerted is called a magnetic field
[B]. The direction of magnetic field at a point is the direction of the resultant force acting on a hypothetical north pole place at that point
[C]. The magnetic field lines always begin from the N-pole of a magnet and end on the S-pole of the magnet.
[D]. All the above
Q9
Consider the following statements and choose the incorrect one:
[A]. Iron feelings show the shape of magnetic field produced by a bar magnet by aligning themselves with the magnetic field lines.
[B]. A compass consists of a tiny pivoted magnet usually in the form of a pointer which can turn freely in the horizontal plane.
[C]. A compass needle do not deflected when brought near a bar magnet.
[D]. The strength of magnet field is indicated by the degree of closeness of the field lines.
Q10
The phenomenon of electromagnetic induction is:
[A]. The process of charging a body.
[B]. The process of generating magnetic field due to a current passing through a coil.
[C]. Producing induced current in a coil due to relative motion between a magnet and the coil.
[D]. The process of rotating a coil of an electric motor.
Q11
Rahul is writing the properties of the magnetic field lines choose the correct statements:
[A]. The magnetic field lines originate from the north pole of a magnet and end at its south pole.
[B]. The magnetic field lines come closer to one another near the poles of a magnet but they are widely separated at other places.
[C]. The magnetic field lines do not intersect or crossed one another
[D]. All the above.
Q12
The essential difference between an AC generator and a DC generator is that:
[A]. A.C. generator has an electromagnet while a DC generator has permanent magnet.
[B]. D.C. generator will generate a higher voltage.
[C]. A.C. generator will generate a higher voltage.
[D]. A.C. generator has slip rings while the DC generator has a commutator.
Q13
Neeru is completed her science chapter where she wrote some statements. She wants to know whether the statements are correct or not? Neeru wants to take help from you:
[A]. A concealed current carrying conductor can be located due to the magnetic effect of current by using a plotting compass.
[B]. The magnetic field lines around a straight conductor or straight wire carrying current are concentric circles whose centres lies on the wire.
[C]. The magnitude of magnetic field produced by a straight current carrying wire at a given point is inversely proportional to the distance of that point from the wire.
[D]. When electric current flows vertically downwards then the direction of magnetic field is anticlockwise.
Q14
The north pole of a long bar magnet was pushed slowly into a short solenoid connected to a galvanometer. The magnet was held stationary for a few seconds with the north pole in the middle of the solenoid and then withdrawn rapidly. The maximum deflection of the galvanometer was observed when the magnet was:
[A]. Moving towards the solenoid
[B]. Moving into solenoid
[C]. At rest inside the solenoid
[D]. Moving out of the solenoid
Q15
An electric generator converts:
[A]. Electrical energy into mechanical energy.
[B]. Mechanical energy into heat energy.
[C]. Electrical energy into chemical energy.
[D]. Mechanical energy into electrical energy.
Download App for Class 10
Q16
In a quiz competition, you are asked a question where you have to choose the statement which is/ are incorrect?
[A]. An electromagnet is a magnet consisting of a long coil of insulated copper wire wrapped around a soft iron core that is magnetized only when electric current is passed through the coil.
[B]. The core of an electromagnet must be soft iron because soft iron losses all of its magnetism when current in the coil is switched off.
[C]. If steel is used for making the core of an electromagnet, the steel does not lost all its magnetism when the current is stopped and it becomes a permanent magnet.
[D]. None of the above.
Q17
Daksh is doing his homework which is given by his teacher. Would you help him to choose the correct sentences?
[A]. Extremely weak electric currents are produced in the human body by the movement of charged particles called ions.
[B]. The two main organs of the human body where the magnetic field produced is quite significant are the heart and the brain.
[C]. The magnetism produced inside the human body from the basis of the technique called Magnetic Resonance Imaging.
[D]. All the above.
Q18
In the last year board examination, Rahul were asked a question where he had to choose the statement which was/were correct? Will you be able to answer this question?
[A]. A magnet exerts a mechanical force on a current carrying wire, and if the wire is free to move, this force can produce a motion in the wire.
[B]. When current carrying conductor is placed in a magnetic field, a mechanical force is exerted on the conductor which can make the conductor move.
[C]. The direction of force acting on a current carrying wire placed in a magnetic field is perpendicular to the direction of current.
[D]. All the above.
Q19
Recently, in a science class test, you are asked a question where you have to say whether the statements are correct or not?
[A]. The minimum force is exerted on a current carrying conductor only when it is perpendicular to the direction of magnetic field.
[B]. The direction of force on a current carrying conductor placed in a magnetic field can also be reversed by reversing the direction of magnetic field.
[C]. No force acts on a current carrying conductor when it is parallel to the magnetic field.
[D]. None of the above
Q20
A 3-pin mains plug is fitted to the cable for a 1 kW electric kettle to be used on a 250 V a.c. supply. Which of the following statements is not correct?
[A]. The fuse should be fitted in the live wire
[B]. A 13 A fuse is the most appropriate value to use
[C]. The neutral wire is coloured black
[D]. The green wire should be connected to the earth pin.
Q21
Which of the following statement is or are correct?
[A]. A motor is a device which converts electrical energy to mechanical energy.
[B]
[C]
[D]
[B]. A motor works on the principle that when a rectangular coil is placed in a magnetic field and current is passed through it a force exerted on the coil which rotates it continuously.
[C]. Commutator rings reverse the direction of current flowing through the coil after every half rotation of the coil.
[D]. All the above.
Q22
Badal appeared in class test but he confused to know the correct statement. Would you help him to know that?
[A]. The electric generator converts mechanical energy into electrical energy.
[B]. The alternating current AC produced in India has a frequency of 50 Hertz.
[C]. The electric generator works on the principle that when a straight conductor is moved in a magnetic field, then current is induced in the conductor.
[D]. All the above.
Q23
Recently, in a science class test, you are asked a question where you have to say whether the statements are correct or not?
[A]. If we replace the slip rings on an AC generator by a commutator, then it will become a DC generator.
[B]. The only difference between a DC generator and AC generator is in the way the two ends of the generator coil are linked to the outer circuit.
[C]. The power house AC generators have a fixed set of coils arranged around a rotating electromagnet.
[D]. None of the above.
Q24
Read the following sentences carefully, and choose the incorrect one:
[A]. All the electrical appliances like bulbs, fans and sockets etc. are connected in parallel across the live wire and the neutral wire.
[B]. There are two separate circuits in a house, the lightning circuit with a 15 A fuse and the power circuit with a 25 A fuse.
[C]. The main advantage of the parallel connection is that if one of the appliances is switched off, or gets fused, there is no effect on the other appliances and they keep on operating.
[D]. Another advantage of the parallel circuits is that the same voltage of the mains line is available for all the electrical appliances
Q25
Priya is writing some statements, choose the incorrect statement and help him:
[A]. To avoid the risk of electric shocks, the metal body of an electrical appliance is “earthed”.
[B]. Touching of the live wire and neutral wire directly is known as short circuit.
[C]. The red colored wire is the live wire, and the black wire is the earth wire, whereas green wire is the neutral wire.
[D]. An extremely large current can flow in domestic wiring under two circumstances i.e., short circuiting and overloading.
It was first shown by Oersted that electricity and magnetism were related phenomena.
What is magnetic field according to Class 10 Science chapter 12?
The region surrounding a magnet, in which the force of the magnet can be detected, is called magnetic field of the magnet.
Why do two magnetic field line not intersect explain as in 10th Science NCERT?
No two field-lines are found to cross each other. If they did, it would mean that at the point of intersection, the compass needle would point towards two directions, which is not possible.
State the Fleming’s left-hand rule according to 10th Science Chapter 12?
According to this rule, stretch the thumb, forefinger and middle finger of your left hand such that they are mutually perpendicular. If the first finger points in the direction of magnetic field and the second finger in the direction of current, then the thumb will point in the direction of motion or the force acting on the conductor.
Free Contents and Solutions
All the study material, sample papers and NCERT Solutions are free to use on Tiwari Academy. We never charge for our contents or services. Feel free to contact us, if feel any difficulty during the use of website.
Last Edited: April 27, 2023
