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Name and state the rule to determine the direction of magnetic field around a straight current-carrying conductor.
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Draw the magnetic lines of force due to a circular wire carrying current.
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What are the various ways in which the strength of magnetic field produced by a current-carrying circular coil can be increased?
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State and explain the Clock face rule for determining the polarities of a circular wire carrying current.
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Name any two factors on which the strength of magnetic field produced by a current-carrying solenoid depends. How does it depend on these factors?
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What is a solenoid? Draw a sketch to show the magnetic field pattern produced by a current-carrying solenoid.
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Name the type of magnet with which the magnetic field pattern of a current-carrying solenoid resembles
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What is the shape of field lines inside a current-carrying solenoid? What does the pattern of field lines inside a current-carrying solenoid indicate?
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List three ways in which the magnetic field strength of a current-carrying solenoid can be increased?
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What type of core should be put inside a current-carrying solenoid to make an electromagnet?
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The diagram given below represents magnetic field caused by a current-carrying conductor which is:
(a) a long straight wire
(b) a circular coil
(c) a solenoid
(d) a short straight wire
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A soft iron bar is inserted inside a current-carrying solenoid. The magnetic field inside the solenoid:
(a) will decrease
(b) will increase
(c) will become zero
(d) will remain the same
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The magnetic field lines in the middle of the current-carrying solenoid are?
(a) circles
(b) spirals
(c) parallel to the axis of the tube
(d) perpendicular to the axis of the tube
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The front face of a circular wire carrying current behaves like a north pole. The direction of current in this face of circular wire is:
(a) clockwise
(b) downwards
(c) anticlockwise
(d) upwards
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A current-carrying straight wire is held in exactly vertical position. If the current passes through this wire in the vertically upward direction, what is the direction of magnetic field produced by it? Name the rule used to find the direction of magnetic field.
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The magnetic field associated with a current-carrying straight conductor is in anticlockwise direction. If the conductor was held along the east-west direction, what will be the direction of current through it? Name and state the rule applied to determine the direction of current?
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A current-carrying conductor is held in exactly vertical direction. In order to produce a clockwise magnetic field around the conductor, the current should passed in the conductor:
(a) from top towards bottom
(b) from left towards right
(c) from bottom towards top
(d) from right towards left
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What happens when a current-carrying conductor is placed in a magnetic field?
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When is the force experienced by a current-carrying conductor placed in a magnetic field largest?
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In a statement of Fleming's left-hand rule, what do the following represent?
(a) direction of centre finger.
(b) direction of forefinger.
(c) direction of thumb.
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