DOWNLOAD MOBILE APPLICATION TO LEARN MORE: MAGNETIC EFFECTS OF ELECTRIC CURRENT MCQ CLASS 10
DOWNLOAD MOBILE APPLICATION TO LEARN MORE: MAGNETIC EFFECTS OF ELECTRIC CURRENT MCQ CLASS 10
DOWNLOAD MOBILE APPLICATION TO LEARN MORE: MAGNETIC EFFECTS OF ELECTRIC CURRENT MCQ CLASS 10
POINTS TO REMEMBER
■ The magnetic field lines emerge from north pole and merge at the south pole.
■ The relative strength of the magnetic field is shown by the degree of closeness of the field lines.
■ The direction of magnetic field associated with a current-carrying conductor is determined by right-hand thumb rule.
Table of Contents
MAGNETIC EFFECTS OF ELECTRIC CURRENT MCQ CLASS 10
1. Choose the incorrect statement from the following regarding magnetic lines of field.
(a) The direction of magnetic field at a point is taken to be the direction in which the north pole of a magnetic compass needle points.
(b) Magnetic field lines are closed curves.
(c) If magnetic field lines are parallel and equidistant, they represent zero field strength.
(d) Relative strength of magnetic field is shown by the degree of closeness of the field lines.
Ans. (c)
2. In a long straight solenoid, N-and S-pole are created at the two ends of the solenoid. Which of the following statements is incorrect?
(a) The field lines inside the solenoid are in the form of straight lines indicating that magnetic field is same at all points inside the solenoid.
(b) The pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet.
(c) N-and S-poles exchange positions when the direction of the current through the solenoid is reversed.
(d) Magnetic field produced inside the solenoid can be used to magnetise a bar of magnetic material like soft iron, when placed inside the solenoid.
Ans. (b)
3. 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 on which the coil is wound.
Ans. (c)
4. 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
Ans. (d)
5. 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.
DOWNLOAD MOBILE APPLICATION TO LEARN MORE: MAGNETIC EFFECTS OF ELECTRIC CURRENT MCQ CLASS 10
6. To convert AC generator to DC generator
(a) split rings and brushes must be used.
(b) split ring type commentator must be used.
(c) rectangular wire loop is to be used.
(d) stronger magnetic field is to be used.
Ans. (b)
7. The most important safety device method used for protecting electrical appliances from short circuiting or overloading is
(a) earthling
(b) use of stabilizers
(c) use of electric meter
(d) use of fuse.
Ans. (d)
8. 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 centered on the wire.
Ans. (d)
9. Choose the correct option:
The magnetic field inside a long straight solenoid carrying current is:
(a) zero
(b) decreases as we move towards its ends.
(c) increases as we move towards its ends.
(d) the same at all points.
Ans. (b)
10. Which of the property a proton can change when it moves freely in a magnetic field?
(a) mass
(b) speed
(c) velocity
(d) momentum
Ans. (c) and (d)
DOWNLOAD MOBILE APPLICATION TO LEARN MORE: MAGNETIC EFFECTS OF ELECTRIC CURRENT MCQ CLASS 10
ALSO VISIT :
10TH CBSE
DOWNLOAD MOBILE APPLICATION TO LEARN MORE: MAGNETIC EFFECTS OF ELECTRIC CURRENT MCQ CLASS 10