Read the passage given below and answer the following questions from (i) to (v).
When a small compass is placed near a magnet, it will experience a force due to the magnetic field of the magnet. It is evidently observed due to a deflection in the north pole pointer of the compass. The path traced by the north pole pointer under the influence of a magnetic field is called the magnetic field line. The magnetic field lines are produced from the north pole of the magnet end at the south pole of the magnet. When the compass is moved around the field line, it always sets itself tangential along the curves.
(i) The magnetic field lines:
intersect at right angle to one another.
intersect at an angle of 45 degree.
cross at an angle of 60 degree
never intersect with each other.
(4)
Read the passage given below and answer the following questions from (i) to (v).
When a small compass is placed near a magnet, it will experience a force due to the magnetic field of the magnet. It is evidently observed due to a deflection in the north pole pointer of the compass. The path traced by the north pole pointer under the influence of a magnetic field is called the magnetic field line. The magnetic field lines are produced from the north pole of the magnet end at the south pole of the magnet. When the compass is moved around the field line, it always sets itself tangential along the curves.
(ii) Magnetic field lines can be used to determine:
the shape of the magnetic field.
only the direction of the magnetic field.
only the relative strength of the magnetic field.
both the direction and the relative strength of the magnetic field.
(4)
Read the passage given below and answer the following questions from (i) to (v).
When a small compass is placed near a magnet, it will experience a force due to the magnetic field of the magnet. It is evidently observed due to a deflection in the north pole pointer of the compass. The path traced by the north pole pointer under the influence of a magnetic field is called the magnetic field line. The magnetic field lines are produced from the north pole of the magnet end at the south pole of the magnet. When the compass is moved around the field line, it always sets itself tangential along the curves.
(iii) The magnetic field lines due to a bar magnet are correctly shown in:
(4)
Read the passage given below and answer the following questions from (i) to (v).
When a small compass is placed near a magnet, it will experience a force due to the magnetic field of the magnet. It is evidently observed due to a deflection in the north pole pointer of the compass. The path traced by the north pole pointer under the influence of a magnetic field is called the magnetic field line. The magnetic field lines are produced from the north pole of the magnet end at the south pole of the magnet. When the compass is moved around the field line, it always sets itself tangential along the curves.
(iv) Which of the following is incorrect regarding magnetic field lines?
The field lines are directed N to S inside the magnet.
The crowdedness of the field lines shows the strength of the magnet.
The field is tangent to the magnetic field line.
Magnetic field lines are closed and continuous curves.
(1)
Read the passage given below and answer the following questions from (i) to (v).
When a small compass is placed near a magnet, it will experience a force due to the magnetic field of the magnet. It is evidently observed due to a deflection in the north pole pointer of the compass. The path traced by the north pole pointer under the influence of a magnetic field is called the magnetic field line. The magnetic field lines are produced from the north pole of the magnet end at the south pole of the magnet. When the compass is moved around the field line, it always sets itself tangential along the curves.
(v) A strong bar magnet placed vertically above a surface. The magnetic field lines will be:
Only in a horizontal plane around the magnet.
Only in a vertical plane around the magnet.
Both in horizontal and vertical plane around the magnet.
In all the planes around the magnet.
(4)
Read the passage given below and answer the following questions from (i) to (v).
A current-carrying wire produces a magnetic field around it. The phenomena in which an electromotive force and current are induced by changing magnetic field through it is called induced current. It can be concluded that the induced current flows in a conductor as long as the magnetic force changes within the conductor. For the motion of the coil with respect to the magnet or vice versa, the direction of the current flowing in the conductor is determined by the direction of the relative motion of the conductor with respect to the magnetic field. The induced emf or current is directly proportional to the rate of change in the magnetic field.
(i) What is the condition of electromagnetic induction?
There must be relative motion between galvanometer and coil of wire.
There must be a relative motion between galvanometer and magnet.
There must be a relative motion between galvanometer and electric motor.
There must be a relative motion between the coil of wire and a magnet.
(4)
Read the passage given below and answer the following questions from (i) to (v).
A current-carrying wire produces a magnetic field around it. The phenomena in which an electromotive force and current are induced by changing magnetic field through it is called induced current. It can be concluded that the induced current flows in a conductor as long as the magnetic force changes within the conductor. For the motion of the coil with respect to the magnet or vice versa, the direction of the current flowing in the conductor is determined by the direction of the relative motion of the conductor with respect to the magnetic field. The induced emf or current is directly proportional to the rate of change in the magnetic field.
(ii) An induced emf is produced when a magnet is plugged into a coil. The magnitude of induced emf does not depend upon:
The number of turns in the coil.
The speed with which the magnet is moved.
The resistivity of the material of the coil.
The strength of the magnet.
(3)
Read the passage given below and answer the following questions from (i) to (v).
A current-carrying wire produces a magnetic field around it. The phenomena in which an electromotive force and current are induced by changing magnetic field through it is called induced current. It can be concluded that the induced current flows in a conductor as long as the magnetic force changes within the conductor. For the motion of the coil with respect to the magnet or vice versa, the direction of the current flowing in the conductor is determined by the direction of the relative motion of the conductor with respect to the magnetic field. The induced emf or current is directly proportional to the rate of change in the magnetic field.
(iii) A bar magnet is pushed steadily into a long solenoid connected to a meter. Which of the following would affect the magnitude of the deflection of the meter?
How fast the magnet is pushed into the coil.
Direction in which the coil is wound.
End of the solenoid where the magnet enters.
Pole of the magnet which enters the coil first.
(1)
Read the passage given below and answer the following questions from (i) to (v).
A current-carrying wire produces a magnetic field around it. The phenomena in which an electromotive force and current are induced by changing magnetic field through it is called induced current. It can be concluded that the induced current flows in a conductor as long as the magnetic force changes within the conductor. For the motion of the coil with respect to the magnet or vice versa, the direction of the current flowing in the conductor is determined by the direction of the relative motion of the conductor with respect to the magnetic field. The induced emf or current is directly proportional to the rate of change in the magnetic field.
(iv) A conducting rod moves across two magnets as shown in the figure and the needle in the galvanometer deflects momentarily. This physical phenomenon is called:
Induced magnetism
Electromagnetism
Static induction
Electromagnetic induction
(4)
Read the passage given below and answer the following questions from (i) to (v).
A current-carrying wire produces a magnetic field around it. The phenomena in which an electromotive force and current are induced by changing magnetic field through it is called induced current. It can be concluded that the induced current flows in a conductor as long as the magnetic force changes within the conductor. For the motion of the coil with respect to the magnet or vice versa, the direction of the current flowing in the conductor is determined by the direction of the relative motion of the conductor with respect to the magnetic field. The induced emf or current is directly proportional to the rate of change in the magnetic field.
(v) Magnetic lines of force inside current-carrying solenoid are:
perpendicular to axis.
along the axis and are parallel to each other.
parallel inside the solenoid and circular at the ends.
circular.
(2)
