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Syeda answered 1 year(s) , 10 month(s) ago

A current through a horizontal power line flows in east to west direction. What is the direction of magnetic field at a point directly below and at a point directly above it.

Answer.

The current is in the east-west direction. Applying the right-hand thumb rule, we get that the direction of magnetic field at a point below the wire is from north to south. The direction...

Asked by R murali

Jul 5

  • 2 Answers
  • 1 Like
  • 26141 Views
Syeda answered 1 year(s) , 11 month(s) ago

What is the function of earth wire ?Why is it neccssary to earth the metalic body of electric appliances

Answer.

The main function of the earth wire is to prevent live wire from overloading and absorbs the excess electrons & flows to beneath the ground . It is necessary because it prevents the elec...

Asked by Vivek

Jul 14

  • 2 Answers
  • 2 Likes
  • 24277 Views
Syeda answered 1 year(s) , 9 month(s) ago

Name the two devices which work on the principle of electromagnetic induction

Answer.

1.Electric Generator.
2.Dynamos.

  • SME Approved

Asked by Narasimha

Aug 10

  • 6 Answers
  • 2 Likes
  • 23257 Views
Amarnathreddy answered 5 year(s) , 7 month(s) ago

Deflection of magnetic compass neeedle above and below the currrent carrying conductor

 
How does a magnetic compass needle deflect in the following situations?

  1. If we Place a straight current carrying wire (the direction of the flow current is from north to south
...

Asked by karan

Aug 31

  • 1 Answer
  • 1 Like
  • 18352 Views
Amarnathreddy answered 4 year(s) , 9 month(s) ago

Write down the differences between electromagnet and permanent magnet

 
Write down the differences between electromagnet and permanent magnet
What is difference between electromagnet and permanent magnet?
Distin...

Asked by R murali

Jul 5

  • 1 Answer
  • 0 Like
  • 15862 Views
Amarnathreddy answered 3 year(s) , 9 month(s) ago

WHY A FUSE IS ALWAYS CONNECTED IN LIVE WIRE AND NOT IN NEUTRAL WIRE?

Answer:  A fuse wire is a safety wire connected in series with the live wire, in case of any large current supply or malfunctioning in the electric connections it melts and breaks the electric...

Asked by Ria

Jun 15

  • 1 Answer
  • 0 Like
  • 14282 Views
Janhavi answered 3 year(s) , 7 month(s) ago

Mention the factors on which the direction of force experienced by a current carrying conductor placed in a magnetic feild depend

 The direction of force experienced by a current carrying conductor placed in a magnetic field depends on the direction of the current in the conductor and the direction of the applied magnetic field. This is g...

Asked by Hajra

Jul 31

  • 1 Answer
  • 1 Like
  • 14243 Views
Abhishek answered 3 year(s) , 10 month(s) ago

What are factors on which the strength of induced current depends?

1-magnetic field 2-no of turns 3-relative motion

Asked by Letusknowwhy

Apr 16

  • 2 Answers
  • 3 Likes
  • 13273 Views
Janhavi answered 4 year(s) , 4 month(s) ago

Why does a current carrying conductor experiences a force when it is placed in a magnetic field?

When a current-carrying conductor is placed in a magnetic field the wire experiences a force due to the interaction between the field and the magnetic field produced by the moving charges in the wire.
...

Asked by Ashish

Nov 30

  • 2 Answers
  • 2 Likes
  • 12981 Views
Amarnathreddy answered 4 year(s) , 11 month(s) ago

What are the factors that affect the magnetic field due to a straight current Carrying wire?

What are the factors that affect the magnetic field due to a straight current Carrying wire?
Answer Magnetic field due to a current carrying straight wire depends as the following....

Asked by Letusknowwhy

Apr 24

  • 1 Answer
  • 0 Like
  • 11278 Views
Amarnathreddy answered 4 year(s) , 11 month(s) ago

What is a magnetic line of force? List the properties of magnetic (field) lines of force?

What is a magnetic line of force? List the properties of magnetic (field) lines of force?
Answer: 
Magnetic line of force:  Magnetic line of...

Asked by Letusknowwhy

Apr 22

  • 1 Answer
  • 0 Like
  • 10485 Views
Amarnathreddy answered 4 year(s) ago

What is a solenoid ?

What is a solenoid? How can it be used to make a magnet (temporary)? How can a strong magnet be made using the solenoid?
 
Answer: The solenoid is a long cyli...

  • 1 Answer
  • 1 Like
  • 10248 Views
Amarnathreddy answered 5 year(s) , 7 month(s) ago

Working of electric motor

 
Electric motor is a device which converts electric energy in to mechanical energy.

Electric motor: Electric motor works on the principle of force on a conductor carry...

Asked by Anjali

Sep 5

  • 1 Answer
  • 1 Like
  • 8498 Views
Amarnathreddy answered 4 year(s) , 9 month(s) ago

Factors affecting the force experienced by a current carrying conductor placed in a uniform magnetic field

On what factors does the force experienced by a current – carrying conductor placed in a uniform magnetic field depend?
 
Answer:  Magnetic force on a current-...

Asked by R murali

Jul 5

  • 1 Answer
  • 2 Likes
  • 8200 Views
Janhavi answered 4 year(s) , 9 month(s) ago

A proton enters a magnetic field of 1.5 tesla with a velocity of 2.0 X 10 raise to power 7 m/sec at an angle of 30 degree with the field.The magnitude of the force on the proton is :

The answer is:      2) 2.4 * 10 raise to power -12 N


The magnitude of the magnetic force on a charg particle is F =  |q| v B sin θ

Here q = charge on a proton = 1.602 x 1...

Asked by Shivika

Jul 4

  • 1 Answer
  • 0 Like
  • 6593 Views
Snehaphilip commented 5 year(s) , 2 month(s) ago

principle of a motor

Principle of a motor:
Answer:  Electric motor is a device that converts electricity into mechanical energy.
 
Working princ...

Asked by Noor

Jan 29

  • 1 Answer
  • 1 Like
  • 5745 Views
Syeda answered 1 year(s) , 9 month(s) ago

How can a solenoid be used to magnetise a steel bar?

 

Answer:  When electric current is passed through a solenoid, a uniform magnetic field is produced inside the coils.
As we know exposing a ferromagnetic material such as steel to the ma...

  • 2 Answers
  • 1 Like
  • 5630 Views
Amarnathreddy answered 5 year(s) , 7 month(s) ago

Right hand thumb rule


Maxwell’s Right-Hand Thumb Rule: 
A convenient way of finding the direction of magnetic field associated with a current-carrying conductor. Imagine that you...

Asked by Anjali

Sep 5

  • 1 Answer
  • 1 Like
  • 5287 Views
Janhavi answered 3 year(s) , 8 month(s) ago

An electron enters a magnetic field at right angles to it as shown in figure. What will be the direction of force acting on the electron. State the rule which gives direction of force on electron.

The rule which gives direction of force on electron is Fleming's left hand rule..Pl. give the figure. Then I can answer.


Asked by Divyam

Jul 18

  • 1 Answer
  • 0 Like
  • 5223 Views
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