Class 10 Science Chapter 13 MCQ Online Test for 2020-2021
|Chapter: 13||Magnetic Effects of Electric Current|
|Contents:||MCQ Online Tests with Answers |
Class 10 Science Chapter 13 MCQ with Answers for 2020-2021
Class 10 Science Chapter 13 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.
To convert an AC generator into DC generator
[A]. Split-ring type commutator must be used
[B]. Slip rings and brushes must be used
[C]. A stronger magnetic field has to be used
[D]. A rectangular wire loop has to be used
Choose the incorrect statement
[A]. Fleming’s right-hand rule is a simple rule to know the direction of induced current
[B]. The right-hand thumb rule is used to find the direction of magnetic fields due to current carrying conductors
[C]. The difference between the direct and alternating currents is that the direct current always flows in one direction, whereas the alternating current reverses its direction periodically
[D]. In India, the AC changes direction after every 1/50 second
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.
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.
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.
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.
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.
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
Which of the following statement is or are correct?
[A]. A motor is a device which converts electrical energy to mechanical energy.
[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.
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?
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?
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 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.
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