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Write one difference between A.C and D.C
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2
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12721
|
April 12, 2020
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(a) What is a magnetic field? How can the direction of magnetic field lines at a placed by determined?
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1
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976
|
April 4, 2019
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(a) What is a solenoid? Draw a sketch of the pattern of field lines of the magnetic field
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1
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1365
|
April 4, 2019
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(a) Describe with diagram an experiment to show that a force is exerted on a current carrying conductor
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1
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7953
|
April 4, 2019
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1. What is an electromagnet?
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1
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2589
|
April 4, 2019
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(i) What is an electromagnet? What does it consist of?
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1
|
3995
|
April 4, 2019
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State ‘Fleming’s Right-Hand Rule’. With a labelled diagram, describe the working of on A.C electric generator
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1
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3853
|
April 4, 2019
|
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1. What are ‘magnetic field lines’? How is the direction of a magnetic field at a point determined?
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1
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3656
|
April 4, 2019
|
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(a) How is the direction of electric current related to the direction of flow of electrons in a wire?
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1
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8214
|
April 4, 2019
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State whether an alpha particle will experience any force in a magnetic field
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1
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4100
|
April 4, 2019
|
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A coil of insulated copper wire is connected to a galvanometer. (i) pushed into the coil
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1
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2716
|
April 4, 2019
|
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How does a solenoid behave like a magnet?
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1
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2713
|
April 4, 2019
|
|
Think you are sitting in a chamber with your back to one wall
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1
|
1232
|
April 4, 2019
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Magnetic lines of force of two pairs of magnets are shown in figure A and B, Out of these two figures
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1
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6581
|
April 4, 2019
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(i) the direction of deflection of the north pole of a compass needle kept at the given point
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1
|
3836
|
April 4, 2019
|
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(i) The degree of deflection of the magnetic compass increases when the compass in moved away from the conductor
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1
|
2632
|
April 4, 2019
|
|
(i) The force experienced by the conductor increases as the current is increased
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1
|
1992
|
April 4, 2019
|
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What is a solenoid? Draw the pattern of magnetic field lines of a solenoid through which a steady current flows
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1
|
15581
|
April 4, 2019
|
|
A coil made of insulated copper wire is connected to a galvanometer
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1
|
699
|
April 4, 2019
|
|
An a-particle enters a uniform magnetic field at right angles to it as shown in figure
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1
|
17630
|
April 4, 2019
|
|
Draw a diagram to show how a magnetic needle deflects
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1
|
3168
|
April 4, 2019
|
|
An electric fuse of rating 3A is connected in a circuit in which an electric iron of power 1kW is connected
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1
|
10883
|
April 4, 2019
|
|
What is the basic difference between A.C generator and D.C generator?
|
|
1
|
745
|
April 4, 2019
|
|
A magnetic compass shows a deflection near a current carrying wire
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1
|
784
|
April 4, 2019
|
|
A proton enters a magnetic field at right angles to it as shown in figure
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1
|
10540
|
April 4, 2019
|
|
Why does a current carrying conductor kept in a magnetic field experience force?
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1
|
1160
|
April 4, 2019
|
|
What is the function of an earth wire? Why is it necessary to earth metallic casings of electric appliances?
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1
|
1234
|
April 4, 2019
|
|
What is meant by the term, “magnetic field”?
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1
|
2124
|
April 4, 2019
|
|
What is the role of split ring in an electric motor?
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1
|
1666
|
April 4, 2019
|
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Why not two magnetic lines of force intersect each other?
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1
|
2294
|
April 4, 2019
|