Magnetic Effects of Electric Current MCQs with answers
Dear candidates you will find MCQ questions of 10th Class - Physics | Chapter: Magnetic Effects of Electric Current here. Learn these questions and prepare yourself for coming examinations. You can check the right answer of any question by clicking the option or by clicking view answer button.
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Q. Relative strength of magnetic field at a point in the space surrounding the magnet is shown by the
✅ Correct Answer: (A)
length of magnet
Q. Which of the following statement is not correct about the magnetic field?
✅ Correct Answer: (D)
Outside the magnet, magnetic field lines go from South to North pole of the magnet.
Q. By which instrument, the presence of magnetic field be determined?
✅ Correct Answer: (D)
Voltmeter
Q. The pattern of the magnetic field produced by the straight current carrying conducting wire is
✅ Correct Answer: (A)
in the direction opposite to the current
Q. A soft iron bar is introduced inside the current carrying solenoid. The magnetic field inside the solenoid
✅ Correct Answer: (C)
will increase
Q. When current is parallel to magnetic field, then force experience by the current carrying conductor placed in uniform magnetic field is
✅ Correct Answer: (A)
Twice to that when angle is 60°
Q. A positive charge is moving upwards in a magnetic field directed towards north. The particle will be deflected towards
✅ Correct Answer: (A)
west
Q. Which of the following factors affect the strength of force experience by a current carrying conduct in a uniform magnetic field?
✅ Correct Answer: (D)
All of above.
Q. Direction of rotation of a coil in electric motor is determined by
✅ Correct Answer: (B)
fleming’s left hand rule
Q. In electric motor, to make the coil rotating continuously in the same direction, current is reversed in the coil after every half rotation by a device called
✅ Correct Answer: (B)
commutator
Q. The condition for the praenomen of electromagnetic induction is that there must be a relative motion between
✅ Correct Answer: (C)
the coil of wire and magnet
Q. The instrument that use to defect electric current in the circuit is known as
✅ Correct Answer: (A)
electric motor
Q. We can induce the current in a coil by
✅ Correct Answer: (A)
moving the coil in a magnetic field
Q. A magnet is moved towards a coil (i) quickly (ii) slowly. The induced potential difference
✅ Correct Answer: (A)
more in (i) than in (ii) case
Q. A.C generator works on the principle of
✅ Correct Answer: (A)
force experience by a conductor in magnetic field
Q. Fleming’s left hand and Right hand rules are used in
✅ Correct Answer: (B)
Electric motor and generator
Q. A D.C generator works on the principle of
✅ Correct Answer: (C)
faraday’s law of electromagnetic induction.
Q. If the current values periodically from zero to a maximum value, back to zero and then reverses its direction, the current is
✅ Correct Answer: (B)
alternative
Q. The main advantage of A.C power transmission over D.C power transmission over’ long distance is
✅ Correct Answer: (A)
AC transmit without much loss of energy
Q. Which among of these are the main characteristics of fuse element?
✅ Correct Answer: (D)
All of the above
Q. For a current in a long straight solenoid N-pole and S-pole are created at the two ends. Among the following statements, the incorrect statement is
✅ Correct Answer: (C)
The pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet.
Q. Commercial electric motors do not use
✅ Correct Answer: (C)
a permanent magnet to rotate the armature
Q. The strength of magnetic field inside a long current carrying straight solenoid is
✅ Correct Answer: (C)
same at all points
Q. To convert an AC generator into DC generator
✅ Correct Answer: (A)
split-ring type commutator must be used
Q. The most important safety method used for protecting home appliances from short circuiting or overloading is
✅ Correct Answer: (B)
use of fuse
Q. What is that instrument which can detect the presence of electric current in a circuit?
✅ Correct Answer: (A)
galvanometer
Q. The magnetic field lines always begin from
✅ Correct Answer: (A)
N-pole and end on S-pole.
Q. Magnetic lines of force inside current carrying solenoid are
✅ Correct Answer: (C)
parallel inside the solenoid and circular at the ends.
Q. A soft iron bar is introduced inside a current carrying solenoid. The magnetic field inside the solenoid
✅ Correct Answer: (B)
will increase.
Q. A magnetic field directed in north direction acts on an electron moving in east direction. The magnetic force on the electron will act
✅ Correct Answer: (C)
vertically downwards.
Q. The direction of force on a current carrying conductor in a magnetic field is given by
✅ Correct Answer: (A)
Fleming’s left hand rule.
Q. The direction of induced current is given by
✅ Correct Answer: (A)
Fleming’s right hand rule.
Q. The most important safety method used for protecting home appliances from short-circuiting or Overloading is
✅ Correct Answer: (C)
use of fuse
Q. The factors on which one magnetic field strength produced by current carrying solenoids depends are
✅ Correct Answer: (D)
All of the above
Q. The nature of magnetic field line passing through the centre of current carrying circular loop is
✅ Correct Answer: (D)
straight line
Q. A current through a horizontal power line flows from south to North direction. The direction of magnetic field line 0.5m above it is
✅ Correct Answer: (A)
North
Q. The strength of magnetic field around a current carrying conductor is
✅ Correct Answer: (B)
directly proportional to the current and inversely proportional to the distance from wire.
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