Advertisements
Advertisements
प्रश्न
State important properties (or characteristics) of magnetic lines of force around a straight conductor.
उत्तर
The main properties are:
(i) The magnetic lines of force are in the form of concentric circles around the conductor but as their distance from the conductor increases, the curvature of lines of force decreases.
(ii) The direction of the magnetic lines of force reverses if the direction of the flow of current in the conductor reverses.
(iii) With the increase of current in the conductor, the number of lines of force or the intensity of the magnetic field also increases.
APPEARS IN
संबंधित प्रश्न
The diagram shows a coil wound around a U shape soft iron bar AB.
1) What is the polarity induced at the ends A and B when the switch is pressed?
2) Suggest one way to strengthen the magnetic field in the electromagnet
3) What will be the polarities at A & B if the direction of current is reversed in the circuit?
Tick the most appropriate answer.
Which of the following methods is used to magnetize a magnetic without touching it by a magnet?
Name and state the rule by which polarity at the ends of a current carrying solenoid is determined.
What is an electric motor?
State two factors on which the magnitude of an induced e.m.f. in the secondary coils of a transformer depends.
State the two properties of the magnetic lines of force around a circular coil.
Describe a simple Experiment to demonstrate that there Exists a magnetic field around a current-carrying conductor.
How does a magnetic field set up by a solenoid change when a soft iron core is inserted inside solenoid?
Which magnet will you use?
Iron is to be separated from trash.
Write the answer in your word.
How is an electromagnet made?
