Read the passage given below and answer the following questions from (i) to (v).
The space surrounding a magnet in which magnetic force is exerted, is called a magnetic field. The direction of magnetic field lines at a place can be determined by using a compass needle. A compass needle placed near a magnet gets deflected due to the magnetic force exerted by the magnet.
The north end of the needle of the compass indicates the direction of magnetic field at the point where it is placed. When the magnet shown in the diagram below is moving towards the coil, the galvanometer gives a reading to the right.
(ii) What is the condition of electromagnetic induction?
There must be a relative motion between the coil of wire and galvanometer.
There must be a relative motion between the galvanometer and a magnet.
There must be a relative motion between the galvanometer and generator.
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).
The space surrounding a magnet in which magnetic force is exerted, is called a magnetic field. The direction of magnetic field lines at a place can be determined by using a compass needle. A compass needle placed near a magnet gets deflected due to the magnetic force exerted by the magnet.
The north end of the needle of the compass indicates the direction of magnetic field at the point where it is placed. When the magnet shown in the diagram below is moving towards the coil, the galvanometer gives a reading to the right.
(iii) A student writes a few statements after studying the principles of electromagnetism and working of electric motor:
(I) Fleming’s left hand rule is used to make electromagnet.
(II) Fleming’s left hand rule is used in electric motor.
(III) Fleming’s right hand rule is used in electric motor.
(IV) Right hand thumb rule is used in electric motor.
Choose the correct statement(s) from the following:
Only (I)
Only (II)
(I) and (III)
(II), (III) and (IV)
(2)
Read the passage given below and answer the following questions from (i) to (v).
The space surrounding a magnet in which magnetic force is exerted, is called a magnetic field. The direction of magnetic field lines at a place can be determined by using a compass needle. A compass needle placed near a magnet gets deflected due to the magnetic force exerted by the magnet.
The north end of the needle of the compass indicates the direction of magnetic field at the point where it is placed. When the magnet shown in the diagram below is moving towards the coil, the galvanometer gives a reading to the right.
(iv) When the magnet is moved away from the coil, it is observed that:
the galvanometer needle deflects to the left
the galvanometer needle deflects to the right.
the galvanometer needle first deflects to the left and then to the right.
the galvanometer needle first deflects to the right and then to the left
(1)
Read the passage given below and answer the following questions from (i) to (v).
The space surrounding a magnet in which magnetic force is exerted, is called a magnetic field. The direction of magnetic field lines at a place can be determined by using a compass needle. A compass needle placed near a magnet gets deflected due to the magnetic force exerted by the magnet.
The north end of the needle of the compass indicates the direction of magnetic field at the point where it is placed. When the magnet shown in the diagram below is moving towards the coil, the galvanometer gives a reading to the right.
(v) The induced current is highest when:
direction of magnetic field is parallel to the direction of motion of coil.
direction of magnetic field is opposite to the direction of motion of coil.
direction of magnetic field is perpendicular to the direction of motion of coil.
direction of magnetic field is in straight line to the direction of motion of coil.
(3)
Read the passage given below and answer the following questions from (i) to (v).
The magnetic field lines of an infinite wire are circular and centered at the wire and they are identical in every plane perpendicular to the wire as shown in the figure.
Since the field decreases with distance from the wire, the spacing of the field lines must increase correspondingly with distance. The direction of this magnetic field may be found with a second form of the right-hand rule. If you hold the wire with your right hand so that your thumb points along the current, then your fingers wrap around the wire in the same sense as B.
(i) A vertical wire carries an electric current out of the page. What is the direction of the magnetic field at point P located to the west from the wire?
North
South
East
Down
(2)
Read the passage given below and answer the following questions from (i) to (v).
The magnetic field lines of an infinite wire are circular and centered at the wire and they are identical in every plane perpendicular to the wire as shown in the figure.
Since the field decreases with distance from the wire, the spacing of the field lines must increase correspondingly with distance. The direction of this magnetic field may be found with a second form of the right-hand rule. If you hold the wire with your right hand so that your thumb points along the current, then your fingers wrap around the wire in the same sense as B.
(ii) A student writes the following statements on the characteristics of magnetic field lines:
(I) The magnetic field lines are imaginary lines.
(II) The magnetic field lines have only magnitude.
(III) The magnetic field lines are closed curves.
(IV) The magnetic field lines emerge from the south pole of a magnet.
Choose the correct statement(s) from the following:
Only (I)
Both (I) and (II)
Both (I) and (III)
Both (II) and (IV)
(3)
Read the passage given below and answer the following questions from (i) to (v).
The magnetic field lines of an infinite wire are circular and centered at the wire and they are identical in every plane perpendicular to the wire as shown in the figure.
Since the field decreases with distance from the wire, the spacing of the field lines must increase correspondingly with distance. The direction of this magnetic field may be found with a second form of the right-hand rule. If you hold the wire with your right hand so that your thumb points along the current, then your fingers wrap around the wire in the same sense as B.
(iii) A current carrying conductor is held in exactly vertical direction. In order to produce a clockwise magnetic field around the conductor, the current should be passed in the conductor:
from top to bottom
from left to right
from bottom to top
from right to left
(1)
Read the passage given below and answer the following questions from (i) to (v).
The magnetic field lines of an infinite wire are circular and centered at the wire and they are identical in every plane perpendicular to the wire as shown in the figure.
Since the field decreases with distance from the wire, the spacing of the field lines must increase correspondingly with distance. The direction of this magnetic field may be found with a second form of the right-hand rule. If you hold the wire with your right hand so that your thumb points along the current, then your fingers wrap around the wire in the same sense as B.
(iv) A student plotted the variation of magnetic field around a straight current carrying wire and the distance from the wire where the magnetic field is measured. Study the graph below and answer the question that follows:
The magnetic field around a current carrying straight wire:
increases linearly with increase in distance.
decreases with increase in distance.
remains constant.
magnetic field at a point does not depend on distance.
(2)
Read the passage given below and answer the following questions from (i) to (v).
The magnetic field lines of an infinite wire are circular and centered at the wire and they are identical in every plane perpendicular to the wire as shown in the figure.
Since the field decreases with distance from the wire, the spacing of the field lines must increase correspondingly with distance. The direction of this magnetic field may be found with a second form of the right-hand rule. If you hold the wire with your right hand so that your thumb points along the current, then your fingers wrap around the wire in the same sense as B.
(v) A positive charge is moving towards a person. The direction of magnetic field lines will be in:
clockwise direction
anticlockwise direction
vertically upward direction
vertically downward direction
(2)
