1) What is meant by the term “magnetic” field?
2) At the center of Bar Magnet there is very week magnetic field. How can you prove it?
3) Define magnetic field lines?
4) Draw a sketch to show the magnetic field pattern (or magnetic field lines) due to a bar magnet.
5) Give three properties of the magnetic field lines.
6) Explain why, two magnetic field lines do not intersect each other.
7) What is meant by Hypothetical north-South Direction? Explain.
8) Explain why, a freely suspended magnet always points in the north-south direction.
9) Why does a compass needle get deflected when brought near a bar magnet?
10) You are given the magnetic field pattern of a magnet. How will you find out from it where the magnetic field is strongest?
11) What are the two ways in which you can trace the magnetic field pattern of a bar magnet?
12) Draw a sketch to show the magnetic lines of force due to a current carrying straight conductor.
13) Draw the magnetic lines of force due to a circular wire carrying current.
14) Describe some experiment to show that the magnetic field is associated with an electric current.
15) State the form of magnetic field lines around a straight current carrying conductor.
16) What is a solenoid prove that it contains magnetism.
17) State qualitatively the effect of inserting an iron core into a current carrying solenoid.
18) Name the rule for finding the direction of magnetic field produced by a straight current carrying conductor.
19) Describe how you will locate a current carrying wire concealed in a wall.
20) Describe the constructions and working of an electromagnet. Mention the factors on which its strength depends.
21) State and explain Maxwell’s right-hand thumb rule.
22) What conclusion do you get from the observation that a current-carrying wire deflects a compass needle placed near it?
23) Name the scientist who discovered the magnetic effect of current.
24) Which effects of current can be utilised detecting a current-carrying wire concealed in a wall?
25) What is a solenoid? Draw a sketch to show the magnetic field lines produced by a current carrying solenoid.
26) What type of “core” should be put inside a current-carrying solenoid to make an electromagnet?
27) What is an electromagnet? How does it differ from a permanent magnet? State three factors on which the strength of an electromagnet depends.
28) Name five devices where permanent magnets are used.
29) In the straight wire A, current is flowing in the vertically downward direction whereas in wire B is current is flowing in the vertically upward direction. What is the direction of magnetic field:
i. In wire A? (b) In wire B?
30) Name the rule which you have used to get the answer.
31) The magnetic field inside a long straight solenoid carrying current:
i. Is zero
ii. Decreases as we move towards its end.
iii. Increases as we move towards its end.
iv. Is the same at all points?
Choose the correct option.
32) What is the shape of a current-carrying conductor whose magnetic field pattern resembles that of a bar magnet?
33) State whether the following statement is true or false:
34) The field inside a long circular coil carrying current will be parallel straight lines.
35) How does a solenoid behave like a magnet? Can you determine the north and south poles of a current-carrying solenoid with the help of bar magnet? Explain.
36) State the rule to determine the direction of magnetic field around a straight current-carrying conductor.
37) What is Maxwell’s corkscrew rule? For what purpose is it used?
38) What are the various ways in which the strength of magnetic field produced by a current-carrying circular coil can be increased?
39) Which of the following correctly describes the magnetic field near a long straight wire?
i. The field consists of straight lines perpendicular to the wire.
ii. The field consists of straight lines parallel to the wire.
iii. The field consists of radical lines originating from the wire.
iv. The field consists of concentric circles centred on the wire.
40) State Fleming’s left-hand rule.
41) In a statement of Fleming’s left-hand rule, What do the following represent?
i. Direction of centre finger.
ii. Direction of forefinger.
iii. Direction of thumb.
42) If the current in a wire is flowing in the vertically downward direction and a magnetic field is applied from west to east, what is the direction of force on the wire?
43) Name one device which works on the magnetic effect of current.
44) What is an electric motor? With the help of a diagram, describe the working of an electric motor?
Compiled By: Ashutosh Pandey
Composed By: Pooja
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