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List the properties of magnetic lines of force
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1
|
606
|
April 4, 2019
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Explain the underlying principle and working of direct current generator (or DC dynamo) by drawing a labelled diagram
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0
|
3300
|
March 16, 2018
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|
With the help of an activity, explain the method of inducing electric current in a coil with a moving magnet. State the rule used to find the direction of electric current thus generated in the coil
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0
|
21744
|
March 16, 2018
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Two circular coils P and Q are kept close to each other, of which coil P carries a current. If coil P is moved towards Q, will some current be induced in coil Q?
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0
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13686
|
March 16, 2018
|
|
Draw an appropriate schematic diagram showing common domestic circuits and discuss the importance of fuse
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0
|
7572
|
March 16, 2018
|
|
With the help of a diagram, describe an experiment to show that a change in current flowing through a coil induces an electric current in a neighbouring coil
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0
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6604
|
March 16, 2018
|
|
Explain an activity to show that a current-carrying conductor experiences a force when placed in a magnetic field
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0
|
16844
|
March 16, 2018
|
|
Explain the distribution of magnetic field due to a current through a circular loop
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0
|
7707
|
March 16, 2018
|
|
Briefly explain an activity to plot the magnetic field lines around a straight current carrying conductor
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0
|
8689
|
March 16, 2018
|
|
Briefly explain an activity to plot the magnetic field lines around a bar magnet. Sketch the field pattern for the same specifying field directions
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0
|
9338
|
March 16, 2018
|
|
In what respect does the construction of an AC generator differ from that of a DC generator?
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0
|
2266
|
March 16, 2018
|
|
A coil made of insulated copper wire is connected to a galvanometer. What will happen to the deflection of the galvanometer if this coil is moved towards a stationary bar magnet and then moved away from it?
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0
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3215
|
March 16, 2018
|
|
Name and state the rule used for determination of direction of induced current produced in a conductor due to a changing magnetic field and give one practical application of this phenomenon in everyday life
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0
|
4632
|
March 16, 2018
|
|
What change in the deflection of the compass needle placed at a point near current carrying straight conductor shall be observed if the
|
|
0
|
841
|
March 16, 2018
|
|
Explain what is short circuiting and overloading in an electric supply
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|
0
|
16779
|
March 16, 2018
|
|
A copper coil is connected to a galvanometer
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|
0
|
3092
|
March 16, 2018
|
|
What are magnetic field lines? How is the direction of a magnetic field at a point determined?
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|
0
|
5290
|
March 16, 2018
|
|
What is the direction of magnetic field lines outside a bar-magnet?
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0
|
2199
|
March 16, 2018
|
|
What is role of fuse used in series with any electrical appliance?
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0
|
660
|
March 16, 2018
|
|
How can the magnitude of the induced current be increased?
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|
0
|
7804
|
March 16, 2018
|
|
What is the difference between a direct current and an alternating current?
|
|
0
|
2788
|
March 16, 2018
|
|
A student makes a statement that magnetic field at X is stronger than at Y. Justify this statement. Also redraw the diagram and mark the direction of magnetic field lines
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|
0
|
3530
|
March 16, 2018
|
|
How is the direction of magnetic field at a point determined?
|
|
0
|
3836
|
March 16, 2018
|
|
How does the strength of the Magnetic field at the centre of a circular coil of a wire depend on: radius of the coil number of turns in the coil
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|
0
|
2914
|
March 16, 2018
|
|
A student performs an experiment to study the magnetic effect of current around a current carrying straight conductor with the help of a magnetic compass
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|
0
|
690
|
March 16, 2018
|
|
What does the divergence of magnetic field lines near the ends of a current-carrying straight solenoid indicate?
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|
0
|
1032
|
March 16, 2018
|
|
A magnetic compass shows deflection when placed near a current-carrying wire
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|
0
|
677
|
March 16, 2018
|
|
What is an electromagnet?
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|
0
|
8363
|
March 16, 2018
|
|
Write SI unit of magnetic field. Under what condition does a moving charge experience
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|
0
|
1805
|
March 16, 2018
|
|
What is electromagnetic induction?
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|
0
|
758
|
March 16, 2018
|