CBSE Questions for Class 10 Physics Magnetic Effects Of Electric Current Quiz 1 - MCQExams.com

The field lines emerge from _______ and merge at ________.
  • east pole, west pole
  • south pole, north pole
  • west pole, east pole
  • north pole, south pole
A positively charged particle (proton) is projected towards east.The magnetic field is towards south.The particle will be deflected towards
  • North
  • Down
  • Up
  • West
According to new convention, earth wire is coded by
  • Green colour
  • Black colour
  • Red colour
  • All
Fill in the blanks:
A current carrying solenoid when freely suspended, it always rests in ________ direction.
  • north-south
  • vertical
  • east-west
  • a direction inclined to north-south 
Complete the following statements with an appropriate word / term to be filled in the blank space(s).

Magnetic field lines emerge from the _________ pole of a solenoid or a permanent magnet.
  • north
  • south
  • north-east
  • none of these
The strength of magnetic field inside a long current carrying straight solenoid is:
  • more at the ends than at the centre
  • minimum in the middle
  • same at all points
  • found to increase from one end to the other
If the current in a wire is directed east wards and it is kept in a magnetic field directed northwards, the direction of force on the wire is:
  • due west
  • due south
  • vertically upwards
  • vertically downwards

In case of a bar magnet, lines of magnetic induction
  • start from the north pole and end at the south pole
  • run continuously through the bar magnet and outside
  • emerge in circular paths from the middle of the bar
  • are produced only at the north pole like rays of light from a bulb
Magnetic lines of force due to a long straight conductor carrying current are
  • straight lines
  • elliptical
  • circular
  • parabolic
An electron is moving towards east in a magnetic field acting vertically downwards. So the electron is deflected towards:
  • South 
  • North
  • East
  • West
In which  form  the field lines inside the infinite solenoid are present ?
  • Perpendicular straight lines
  • Circular lines
  • Ellipsoidal lines
  • Parallel straight lines
The magnetic field generated along the axis of a solenoid is proportional to:
  • Its length
  • Square of current flowing in it
  • Number of turns per unit length in it
  • Reciprocal of its radius
An electric motor converts :
  • Electrical energy to light energy 
  • Electrical energy to mechanical energy 
  • Light energy to electrical energy 
  • Mechanical energy to electrical energy 
The wire having a black plastic covering is a
  • live wire
  • neutral wire
  • earth wire
  • none of these
  • Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
  • Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
  • Assertion is correct but Reason is incorrect
  • Assertion is incorrect but Reason is correct
Which of the following figures depict non uniform magnetic field?
A magnetic compass shows a deflection when placed near a current carrying wire. If the current in the wire is increased, How does the deflection of the compass gets affected ?
  • increased
  • decreased
  • remain same
  • data insufficient
A current carrying conductor
  • Experiences a force when it is in magnetic field
  • Does not experience a force when it is in magnetic field
  • Experiences the force only when the field is electromagnetic in nature
  • none of the above
In the right-hand thumb rule, where does the thumb point to?
  • Direction of current
  • Direction of magnetic field
  • Direction of Earth's magnetic field
  • All of these
Which of the following statements is correct about the magnetic lines of force inside a current carrying solenoid ?
  • magnetic field lines are along the axis and are parallel to each other
  • magnetic field lines are perpendicular to the axis and equidistant from each other
  • magnetic field lines are circular and they do not intersect each other
  • magnetic field lines are circular at the ends but they are parallel to the axis inside the solenoid.
The wire having a red plastic covering is a 
  • live wire
  • neutral wire
  • earth wire
  • none of these
The magnetic lines of force due to straight current carrying conductor are:
  • circular lines
  • straight lines
  • concentric lines
  • elliptical lines
An electron is moving vertically downwards at any place. The direction of magnetic force acting on it due to horizontal component of earth's magnetic field will be
  • towards east
  • towards west
  • towards north
  • towards south
An electron and a proton travel with equal speeds and in the same direction, at $$90^o$$ to a uniform magnetic field. They experience forces which are initially
  • in opposite direction and differ by a factor of about 1840
  • in the same direction and differ by a factor of about 1840
  • equal in magnitude but in opposite directions
  • identical
Where the switch is connected in a circuit ? 
  • in the ground wire.
  • in the live wire
  • in the neutral wire
  • in live and neutral both.
What is the order of colour code for the insulation on the (a) live (b) neutral and (c) earth wire?
  • Brown, Blue and Green.
  • Blue, green and brown.
  • Green, blue and brown.
  • Green,brown and blue.
The magnetic lines of force inside a bar magnet:
  • From N-pole to S-pole of magent
  • Do not exist
  • Depend upon the area of cross section of bar magnet
  • From S-pole to N-pole of magnet
What energy conversion does take place in a generator when it is in use?
  • The electrical energy changes into the electrical energy.
  • The mechanical energy changes into the mechanical energy.
  • The electrical energy changes into the mechanical energy.
  • The mechanical energy changes into the electrical energy.
What name is given to a cylindrical coil of diameter less than its length ?
  • Lactometer
  • Barometer
  • Bolenoid
  • Solenoid
If a positively charged particle is moving as shown in the figure, then it will get deflected due to magnetic field towards :

143536_a82219a47e174bd68006118dc4a5a406.png
  • +x direction
  • +y direction
  • -x direction
  • +z direction
0:0:1


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