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WHAT IS THE DIFFERENCE BETWEEN AC AND DC CURENT ?
notes of magnetic effects of electric current
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?
explain different ways to induce current in a coil.
Explain what is short circuiting and overloading in an electric supply.
In the figure below, identify the poles marked P and Q as north pole or south Pole. Give reason for your answer.
labelled diagram of an electric motor. Explain its principle and
working. What is the function of a split ring in an electric motor?
Two metallic spheres of same mass are given equal and opposite charges, then :
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
What will happen to magnetic field due to a circular coil carrying electric current,if the number of turns of the coil is doubled ?
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
name the material which can be used to make -
What is the function of brushes in electric generator?
EXPRESS WORK DONE IN AN ELECTRIC FIELD IN TERMS OF CHARGE AND POTENTIAL DIFFERNCE ? CALCULATE THE AMOUNT OF WORK DONE IN CARRYING A CHARGE OF 5mC AGAINST A POTENTIAL DIFFERENCE OF 100 V??
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 essential requirements of a heater element are------------------
a]high resistivity ,low melting point.b]low resistivity,low melting point.c]low conductivity,hogh melting point.d]low resistivity,high melting point.e]high resistivity,high melting point.
is there a magnetic field produced around a thin beam of moving 1)alpha particles , 2)neutrons? justify your answer
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.........
which of the following is true regarding fuse wire ?
Explain why a copper wire can not be used as a fuse wire?
Rate at which charge flows through a circuit is ______ to the resistance.
a) inversely b) directly related c) not related
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.
Q4.We know a current carrying conductor placed in a magnetic field experiences a force due to which the conductor moves. How do we think the rod displaces if - (a) current in rod is increased (b) a strong horse shoe is inserted (c) length of the rod is increased.
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????
why the magnetic field lines always begin from N-pole of a magnet and end on S-pole of the magnet
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,
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 IS THE PRINCIPLE OF THE ELECTRIC GENERATOR ???
how fleming's right hand rule is used to find the induced current in AC Generator ?
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?
magnet is a good conductor of electricity
is it true
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
what is the function of slip rings in ac generator?
write one application of magnetic field of a current carrying solenoid.
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
what is ampere's swimming rule??
1.A potential difference of 20 volts is applied across the ends of a resistance of 5 ohms. What
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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