# Magnetic Effect of Electric Current - MCQs-2

CBSE Class 10 Physics

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Directions: Read the question carefully and choose the right option from the choices given.

Q1: The south pole of a freely suspended magnet points to the:

(a) Geographical south
(b) Geographical north
(c) Slightly left of geographical north
(d) None of these

Q2: For the current-carrying solenoid as shown below, at which point the field strength is maximum?

(a) At point A
(b) At point B
(c) At point C
(d) All of these

Q3: Magnetic field is :
(a) Scalar
(b) Vector
(c) Some times scalar sometimes vector
(d) None of these

Q4: The polarity of an electromagnet depends on the :
(a) Number of the turns in a coil
(b) Direction of flow of current
(c) Nature of material
(d) All are correct

Q5: Which of the following is an INCORRECT statement about electric motors?
(a) Electric motor works on the principle of the magnetic effect of electric current.
(b) Armature is rotated by supplying electric current.
(c) It converts mechanical energy into electrical energy.
(d) Split ring is used as commutator to make coil rotate in the same direction.

Q6: By increasing the number of turns in the coil, the strength of the magnetic field:
(a) decreases
(b) increases
(c) first increases then decrease
(d) remains unchanged

Q7: Direction of force acting on a current-carrying conductor kept in a magnetic field is given by :
(a) Fleming’s right-hand rule
(b) Fleming’s left-hand rule
(c) Lenz’s rule

Q8: When we slide a bar magnet into a coil, the strength of the induced current depends on -
(a) the number of turns in the coil
(b) the speed with which the magnet moves
(c) strength of that bar magnet
(d) all of these

Q9: Why copper wire cannot be used as a fuse wire :
(a) Copper wire will get warm
(c) Copper wire has melting point quite high and it will not melt easily
(d) None of these

Q10: Applications based on the heating effect of current work on
(a) only AC
(b) only DC
(c) both AC and DC
(d) none of these

1: (c) Slightly left of geographical north
2: (a) At point A
3: (b) Vector
4: (b) Direction of flow of current
5: (c) It converts mechanical energy into electrical energy.
6: (b) increases
7: (b) Fleming’s left-hand rule
8: (d) all of these
9: (c) Copper wire has melting point quite high and it will not melt easily
10: (c) both AC and DC  