Select Board & Class
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?
if a current carrying conductor is placed perpendicular to the uniform magnetic field.what happens to the displacement of the conductor if
1.the strength of the current increases
2.if horse shoe magnet is replaced by a weak horse shoe magnet.
explain different ways to induce current in a coil.
Explain what is short circuiting and overloading in an electric supply.
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
Plzz can anyone explain me the activity 13.9 in NCERT text science in chapter.... Magnetic effects of electric current.
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 constitutes the fields of a magnet?
What is Difference between Short Circuit & overloading?
Please answer it with about 4 points.
example 13.1 ncert...? pls explain....
A circuit has a fuse of 5A.find the maximum number of 100W 220V lamp that can be used in a circuit.
A student while studying the force experienced by a current carrying conductor in a
Magnetic field is scalar or vector quantity ? Give reasons for your answer.
state and explain properly maxwell right hand thumb rule
If the no. of turns of a circular current carrying coil are doubled, then how will the magnetic field produced by it changes?
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
What is the function of brushes in electric generator?
List two methods of producing magnetic fields.
The direction of the magnetic field at a point P above the wire carrying current wire as shown in figure is :
down the page
up the page
into the page
out of the page
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 ?
Explain why a copper wire can not be used as a fuse wire?
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?
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?
Write an expression for the force acting on a conductor of length l carrying current (I) and placed perpendicular to the magnetic field (B).
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.........
. If the current is flowing in the direction of advancement of screw, then what is the direction of magnetic field lines?
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????
write one application of magnetic field of a current carrying solenoid.
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?
A compass needle gets deflected when brought near a current carrying conductor.y?wht happens to the deflection of needle when current in the conductor is increased?
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,
what is an electromagnet? how can we determine north and south pole of an electromagnet with the help of magnetised iron bar.
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?
What is the function of brushes in electric motors and generators?
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!!
In the figure below, identify the poles marked P and Q as north pole or south Pole. Give reason for your answer.
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
name the material which can be used to make -
what is the function of slip rings in ac generator?
You are provided with a bar magnet, a coil and a galvanometer. Describe the activity with the help of these to show that :
(i) a current is induced in the coil only when magnetic field lines through it change
(ii) induced current lasts till the change in magnetic field is taking place
(iii) direction of induced current depends on whether magnetic field lines through the coil are increasing or decreasing
(iv) induced current is the highest when magnetic field and motion of the coil are perpendicular to each other. Draw diagram for the setup.
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??
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 ?
Copyright © 2020 Applect Learning Systems Pvt. Ltd. All rights reserved.
E.g: 9876543210, 01112345678
We will give you a call shortly, Thank You
Office hours: 9:00 am to 9:00 pm IST (7 days a week)