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प्रश्न
Write the correct option by observing the figures.
विकल्प
Magnetic field in A is stronger.
Magnetic field in B is stronger.
Magnetic fields in A and B are same.
Magnetic fields in A and B are weaker.
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उत्तर
Magnetic field in B is stronger.
APPEARS IN
संबंधित प्रश्न
Fill in the following blank with suitable words:
If a coil is viewed from one end, and the current flows in a clockwise direction, then this end is a ........... pole.
Describe some experiment to show that the magnetic field is associated with an electric current.
What is Maxwell's corkscrew rule? For what purpose is if used?
The magnetic effect of current was discovered by:
(a) Maxwell
(b) Fleming
(c) Oersted
(d) Faraday
For the coil in the diagram below, when the switch is pressed:
(a) what is the polarity of end A?
(b) which way will the compass point then?
What device reverses the current?
Which way does the wire in the diagram below tend to move?
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the N-pole is removed?
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(b) State whether the following statements are true or false:
(i) Magnetic poles exist in pairs.
Answer the following question:
State the effect on the magnetic needle in Oersted’s experiment when:
(a) the current is passed through the wire.
(b) the current through the wire is increased
(c) the current through the wire is reversed.
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What do you mean by the magnetic effect?
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A student was asked to perform an experiment to study the force on a current carrying conductor in a magnetic field. He took a small aluminium rod AB, a strong horse shoe magnet, some connecting wires, a battery and a switch and connected them as shown. He observed that on passing current, the rod gets displaced. On reversing the direction of current, the direction of displacement also gets reversed. On the basis of your understanding of this phenomenon, answer the following questions:
- Why does the rod get displaced on passing current through it?
- State the rule that determines the direction of the force on the conductor AB.
-
- If the U-shaped magnet is held vertically and the aluminium rod is suspended horizontally with its end B towards due north, then on passing current through the rod from B to A as shown, in which direction will the rod be displaced?
- Name any two devices that use current carrying conductors and magnetic fields.
OR
Draw the pattern of magnetic field lines produced around a current carrying straight conductor held vertically on a horizontal cardboard. Indicate the direction of the field lines as well as the direction of current flowing through the conductor.
