हिंदी

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. - Science

Advertisements
Advertisements

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.

Advertisements

उत्तर

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

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 2: Magnetic Effects of Electric Current - Exercise 2 [पृष्ठ ८२]

APPEARS IN

लखमीर सिंग Physics (Science) [English] Class 10
अध्याय 2 Magnetic Effects of Electric Current
Exercise 2 | Q 11.4 | पृष्ठ ८२

वीडियो 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.


Will the compass needle show deflection when the switch in the circuit shown by figure is closed?


Which effect of current can be utilised in detecting a current carrying wire concealed in a wall? 


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.


If the direction of electric current in a solenoid when viewed from a particular end is anticlockwise, then this end of solenoid will be:

(a) west pole
(b) south pole
(c) north pole
(d) east pole


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?    


The direction of current flowing in the coil of an electromagnet at its two ends X and Y are as shown below:  

  

 What is the polarity of end X?

What is the polarity of end Y?   

Name and state the rule which you have used to determine the polarities. 


When the switch S is closed in the figure given below, the pointer of the galvanometer moves to the right.  

 

If S is kept closed, will the pointer:

(a) return to zero?
(b) stay over on the right?
(c) move to the left and stay there
(d) move to and fro until S is opened


The north pole of a long bar magnet was pushed slowly into a short solenoid connected to a galvanometer. The magnet was held stationary for a few seconds with the north pole in the middle of the solenoid and then withdrawn rapidly. The maximum deflection of the galvanometer was observed when the magnet was ______.


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?


In the Activity shown below, how do we think the displacement of rod AB will be affected if

  1. current in rod AB is increased
  2. a stronger horse-shoe magnet is used
  3. length of the rod AB is increased?
  • Take a small aluminium rod AB (of about 5 cm). Using two connecting wires suspend it horizontally from a stand, as shown in Fig.
  • Place a strong horse-shoe magnet in such a way that the rod lies between the two poles with the magnetic field directed upwards. For this put the north pole of the magnet vertically below and south pole vertically above the aluminium rod (Fig.).
  • Connect the aluminium rod in series with a battery, a key and a rheostat.
  • Now pass a current through the aluminium rod from end B to end A.
  • What do you observe? It is observed that the rod is displaced towards the left. You will notice that the rod gets displaced.
  • Reverse the direction of current flowing through the rod and observe the direction of its displacement. It is now towards the right.
  • Why does the rod get displaced?


A current-carrying rod, AB, experiences a force perpendicular to its length and the magnetic field. Support for the magnet is not shown here, for simplicity.


(c) Considering the relationship in the first pair, complete the second paie :
AgCI : White :: CuI2 : ___________


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. 


Magnetic effect of current was discovered by ______.


Unscramble the following words:

HTRCO


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


An electric bell contains an ______, consisting of coils of insulated wire wound around
iron rods.


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?

As shown in the diagram an aluminium rod 'AB' is suspended horizontally between the two poles of a strong horse shoe magnet in such a way that the axis of rod is horizontal and the direction of the magnetic field is vertically upward. The rod is connected in series with a battery and a key.

State giving reason:

  1. What is observed when a current is passed through the aluminium rod from end B to end A?
  2. What change is observed in a situation in which the axis of the rod 'AB' is moved and aligned parallel to the magnetic field and current is passed in the rod in the same direction?

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×