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WHAT IS THE DIFFERENCE BETWEEN AC AND DC CURENT ?
notes of magnetic effects of electric current
magnet is a good conductor of electricity
is it true
Explain why, a freely suspended magnet always points in the North-South direction.
About 3-4 mark answer please!
WHY DON'T TWO MAGNETIC FIELD LINES INTERSECT EACH OTHER?
Why force is directly proportional to sin theta in magnetism
explain different ways to induce current in a coil.
How can a solenoid be used to magnetise a steel bar?
Explain what is short circuiting and overloading in an electric supply.
no force acts on the charge fired through a magnetic field,when the angle between its velocity and magnetic field is:-
labelled diagram of an electric motor. Explain its principle and
working. What is the function of a split ring in an electric motor?
give reason why (i)tungsten is used for making filament of electric lamps; (ii) the elements of heating electrical appliaces are made up of an alloy rather than pure metal
the underlying principle and working of an electric generator by
drawing a labelled diagram. What is the function of brushes?
explain constuction and principle of a.c. generator with diagram?
What is Difference between Short Circuit & overloading?
Please answer it with about 4 points.
A circuit has a fuse of 5A.find the maximum number of 100W 220V lamp that can be used in a circuit.
Magnetic field is scalar or vector quantity ? Give reasons for your answer.
state and explain properly maxwell right hand thumb rule
List the factors on which the magnetic field produced by a current carrying straight conductor depends ? State the rule which gives the direction of its magnetic field. Draw the pattern of magnetic field lines due to a straight current carrying conductor.
(a) Describe an activity to demonstrate the pattern of magnetic field lines around a straight conductor carrying current. (b) State the rule to find the direction of magnetic field associated with a current carrying conductor. (c) What is the shape of a current carrying conductor whose magnetic field pattern resembles that of a bar-magnet ?
difference between a bar magnet and an electro magnet
A man is standing on a road and observes that rain is falling at angle 45º with the vertical. The man starts running on the road with constant acceleration 0.5 m/s2. After a certain time from the start of the motion, it appears to him that rain is still falling at angle 45º with the vertical, with speed 2√2 m/s . Motion of the man is in the same vertical plane in which the rain is falling. Then which of the following statement(s) are true.
It is not possible
Speed of the rain relative to the ground is 2 m/s.
Speed of the man when he finds rain to be falling at angle 45º with the vertical, is 4m/s.
The man has travelled a distance 16m on the road by the time he again finds rain to be falling at angle 45°.
there can be more than one option correct
What is the function of brushes in electric generator?
List two methods of producing magnetic fields.
What is meant by overloading of an electrical circuit ? Explain two possible causes due to which overloading may occur in household circuit ? Explain one precaution that should be taken to avoid the overloading of domestic electric circuit.
What is role of split ring in an electric motor ?
1. Write down the preparation, 2 properties and 2 uses for the following :-(a) Washing soda.(b) Baking soda.(c) Bleaching powder.(d) Plaster of paris.2. Why does a transformer not work in DC?
THE MAGNETIC POLES USED IN A DC MOTOR ARE OF A SINGLE MAGNET OR OF DIFFERENT?
is there a magnetic field produced around a thin beam of moving 1)alpha particles , 2)neutrons? justify your answer
what is faradays law?
Q2. The magnetic field lines in a given region is uniform. Draw a diagram to represent them. Write two ways to induce current in a coil?
i have not understood fleming's Left Hand Rule and Right hand thumb rule please explain
kindly suggest any science working model project for physics or chemistry class X...thanx
Which of the following property of a proton can change while it moves freely in a magnetic field? (Mass, speed, velocity, momentum) Please answer soon.........
Explain why a copper wire can not be used as a fuse wire?
what does it mean when the galvanometer deflects to the left side,i.e, to the negative side?
How does a solenoid behave like a magnet? Can you determine the north and south poles of a current-carrying solenoid with the help of a bar magnet? Explain.
13. Draw the pattern of magnetic field lines of a current carrying circular loop. What does the
what is the difference between A.C. generator and D.C. generator as well as A.C motor A.C motor????
what is the principle of the electric motor?
Difference between fleming's left hand rule and right hand rule?where to apply left hand rule and where to apply right hand rule?
state 2 ways by which the strength of an electromagnet can be increased.what type of core is used to make an electromagnet?state 3 differences btwn the electromagnet and permanent,
in an electric circuit with a resistance wire and a cell, the current flowing is I. What would happen to this current if the wire is replaced by another thicker wire of same material and same length? give reason
Why does a current carrying conductor kept in a magnetic field experience force? On what factor does the direction of this force depend? Name and state the rule used determination of direction of current
What does the arrow of the magnetic field line indicate? What does crowding of field lines at a point mean? Plz answer quickly!!!!!!!!
WHAT IS THE PRINCIPLE OF THE ELECTRIC GENERATOR ???
what is meant by the vicinity of the conductor?
how fleming's right hand rule is used to find the induced current in AC Generator ?
positive terminal of battery is north pole or south pole
how to make a science model using waste materials available at home
consider a circular loop of wire lying in the plane of the table let the current pass through the loop clockwise apply the right hand rule to find out the direction of magnetic field inside and outside the loop?
A current through a horizontal power line flows in east to west direction.What is the direction of magnetic field line at a point directly below it?How to do this.I cant understand the text book solution plsss someone help!!
why v use Flaming's left hand and right hand rules . why not the same say left or right hand rule can't be used when three terms i.e. direction of field, current and force are same
explain how to plot magnetic field of bar magnet by a compass ?
What is a transformer?
what is the function of slip rings in ac generator?
An AC generator can be converted into a DCgenerator by replacing(1) Its armature with a coil(2) Its concave magnets(3) Its slip rings with split rings(4) Two brushes with four brushes
compare the magnetic field pattern due to a current carrying solenoid with that of a bar magnet
state flemings left hand rule
If a particle moves in a circular path in clockwise direction after entering in to a downward vertical magnetic field. The charge on the particle is ?
positive or negative
what is ampere's swimming rule??
name the material which can be used to make -
Explain the function of fuse in a domestic circuit?
What is clock face rule?
why does a current carrying conductor kept in magnetic field experience force ?
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