Find here the Most Important NCERT chapter-wise Multiple Choice Questions from Class 10 Science with Answers Pdf free download. this may assist you to understand and check your knowledge about the chapters Most Important MCQ. Students also can take a free test of the Multiple Choice Questions of The chapters Most Important MCQ. Each question has four options followed by the right answer. These Most Important MCQ Questions are selected supported by the newest exam pattern as announced by CBSE.
Q1. A device for producing electric current is called a
(a) Galvanometer
(b) Motor
(c) Generator
(d)Ammeter
(c) Generator
Q2. Inside the magnet, the field lines moves
(a) from north to south
(b) from south the north
(c) away from south pole
(d) away from north pole
(a) from north to south
Q3. Magnetic Effect of Electric Current Class 10 MCQ Question 1. Magnetic effect of current was discovered by
(a) Oersted
(b) Faraday
(c) Bohr
(d) Ampere
(a) Oersted
Q4. By which instrument, the presence of magnetic field be determined?
(a) Magnetic Needle
(b) Ammeter
(c) Galvanometer
(d) Voltmeter
(d) Voltmeter
Q5. The nature of magnetic field line passing through the centre of current carrying circular loop is
(a) circular
(b) ellipse
(c) parabolic
(d) straight line
(d) straight line
Q6. The magnetic field near a long straight wire is described by
(a) Straight field lines parallel to the wire.
(b) Straight field lines perpendicular to the wire.
(c) Connective circle centered on the wire.
(d) Radial field lines starting from the wire.
(c) Connective circle centered on the wire.
Q7. The pattern of the magnetic field produced by the straight current carrying conducting wire is
(a) in the direction opposite to the current
(b) in the direction parallel to the wire
(c) circular around the wire
(d) in the same direction of current
(a) in the direction opposite to the current
Q8. At the time of short circuit, the current in the circuit
(a) vary continuously
(b) reduced considerably
(c) increases heavily
(d) does not change
(c) increases heavily
Q9. Which of the following properties of a proton can change when it moves freely in a
magnetic field
(a) mass
(b) speed
(c) velocity
(d) momentum
(c) velocity
Q10. A positive charge is moving upwards in a magnetic field directed towards north. The particle will be deflected towards
(a) west
(b) north
(c) south
(d) east
(a) west
Q11. Electric motor converts:
(a) chemical energy into electric energy
(b) electric energy into mechanical energy
(c) mechanical energy into electric energy
(d) electric energy into chemical energy.
(b) electric energy into mechanical energy
Q12. Unit of magnetic flux is:
(a) Weber / metre2
(b) Weber
(c) Weber/metre
(d) Weber-metre2
(b) Weber
Q13. 1 Tesla is equal to:
(a) 1 Weber/m2
(b) 1 Gauss
(c) 10-4 Weber/m2
(d) 10-4 Gauss.
(a) 1 Weber/m2
Q14. If Ø = magnetic flux, B = magnetic field intensity, A = area, then the correct relationship between them is:
(a) B = Ø/A
(b) Ø = B/A
(c) A = BØ
(d) B = ØA
(a) B = Ø/A
Q15. Unit of magnetic flux is:
(a) weber
(b) weber/metre
(c) weber/metre2
(d) weber-metre
(a) weber
Q16. Unit of magnetic flux is:
(a) newton-ampere-metre
(b) newton-metre/ampere
(c) newton/ampere-metre
(d) newton-ampere/metre
(b) newton-metre/ampere
Q17. The magnitude of induced e.m.f. is:
(a) proportional to the rate of change of field lines
(b) proportional to earth’s magnetic field
(c) depend on material of coil
(d) inversely proportional to the rate of change of speed of magnet.
(a) proportional to the rate of change of field lines
Q18. Lenz’s law is based on which conservation law:
(a) charge
(b) mass
(c) momentum
(d) energy
(d) energy
Q19. The instrument which converts mechanical energy into electric energy, is:
(a) motor
(b) dynamo
(c) galvanometer
(d) transformer
(b) dynamo
Q20. Dynamo converts:
(a) chemical energy into electric energy
(b) sound energy into magnetic energy
(c) mechanical energy into electric energy
(d) mechanical energy into light energy.
(c) mechanical energy into electric energy
Q21. 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
(C) Do not cross one another
Q22. 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
(C) A permanent magnet to rotate the armature
Q23. For A Current In A Long Straight Solenoid N- And S-Poles Are Created At The Two Ends. Among The Following Statements, The Incorrect Statement Is
(A) The field lines inside the solenoid are in the form of straight lines which indicates that the magnetic field is the same at all points inside the solenoid
(B) The strong magnetic field produced inside the solenoid can be used to magnetize a piece of magnetic material like soft iron, when placed inside the coil
(C) The pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet
(D) The N- and S-poles exchange position when the direction of current through the solenoid is reversed
(C) The pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet
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