मराठी

Fill in the Following Blanks with Suitable Words: If a Coil is Viewed from One End and the Current Flows in an Anticlockwise Direction, Then this End is a ........... Pole.

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प्रश्न

Fill in the following blank with suitable words:

 If a coil is viewed from one end and the current flows in an anticlockwise direction, then this end is a ........... pole.

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उत्तर

 If a coil is viewed from one end and the current flows in an anticlockwise direction, then this end is a north pole.

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पाठ 5: Magnetic Effects of Electric Current - Exercise 2 [पृष्ठ ८२]

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लखमीर सिंह Physics [English] Class 10
पाठ 5 Magnetic Effects of Electric Current
Exercise 2 | Q 11.4 | पृष्ठ ८२

व्हिडिओ ट्यूटोरियलVIEW ALL [2]

संबंधित प्रश्‍न

When the current is switched on through a wire, a compass needle kept nearby gets deflected from its north-south position. Explain.


An electromagnet does not attract a piece of iron.


Name the scientist who discovered the magnetic effect of current.


Describe some experiment to show that the magnetic field is associated with an electric current. 


A coil is connected to a galvanometer. When the N-pole of magnet is pushed into the coil, the galvanometer deflected to the right. What deflection, if any, is observed when: 

 the S-pole is inserted?


If fuse of 250 mA, 500 mA, 1 A, 5 A and 10 A were available, which one would be the most suitable for protecting an amplifier rated at 240 V, 180 W?  


Write the correct option by observing the figures.


(ii) Global warming is a desirable aspect of the intensified greenhouse effect.


Read the given passage and answer the following questions:

The home electrical connection consists of ‘live’, ‘neutral’ and ‘earth’ wires. The ‘live’ and the ‘neutral’ wires have potential difference of 220 V. The ‘earth’ is connected to ground. Due to a fault in the equipment or if the plastic coating on the ‘live’ and the ‘neutral’ wires gives a way the two wires come in contact with each other and a large current flows through it producing heat. If any inflammable material (such as wood, cloth, plastic, etc.) exists around that place it can catch fire. Therefore a fuse wire is used as a precautionary measure.

  1. Name the two wires having potential difference of 220 V.
  2. What is a short circuit?
  3. Write the function of a fuse.

Name any two appliances which works on the phenomenon of magnetic effect of electric current.


Draw a neat labelled diagram to show the magnetic effect of electric current.


What is that instrument which can detect the presence of electric current in a circuit?


A uniform magnetic field exists in the plane of paper pointing from left to right as shown in Figure. In the field an electron and a proton move as shown. The electron and the proton experience


Magnetic effect of current was discovered by ______.


Boojho made an electromagnet by winding 50 turns of wire over an iron screw. Paheli also made an electromagnet by winding 100 turns over a similar iron screw. Which electromagnet will attract more pins? Give reason.


How does the magnetic effect of electric current help in the working of an electric bell? Explain with the help of a diagram.


A wire with green insulation is usually the live wire of an electric supply.


The figure given below shows the magnetic field around the conductor. Study it and answer the questions:

  1. What changes are caused by increasing current?
  2. What do you see when the magnetic needle is kept a little away from the wire?
  3. In the second part of the figure, the iron filings arrange themselves in a circular manner around the wire. Why does this happen?

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: 

  1. Why does the rod get displaced on passing current through it?
  2. State the rule that determines the direction of the force on the conductor AB.
    1. 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?
    2. 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.


Using an electromagnet, you can make a working model of a railway signal as shown in figure.


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