Read and download free pdf of CBSE Class 10 Physics Magnetic Effects Of Electric Current Worksheet Set B. Students and teachers of Class 10 Physics can get free printable Worksheets for Class 10 Physics in PDF format prepared as per the latest syllabus and examination pattern in your schools. Standard 10 students should practice questions and answers given here for Physics in Grade 10 which will help them to improve your knowledge of all important chapters and its topics. Students should also download free pdf of Class 10 Physics Worksheets prepared by school teachers as per the latest NCERT, CBSE, KVS books and syllabus issued this academic year and solve important problems provided here with solutions on daily basis to get more score in school exams and tests
CBSE Class 10 Physics Worksheet - Magnetic Effects Of Electric Current (1). Students can download these worksheets and practice them. This will help them to get better marks in examinations. Also refer to other worksheets for the same chapter and other subjects too. Use them for better understanding of the subjects.
Question. Define the term induced electric current.
Ans. Induced electric current: It is the current which is created due to the relative motion of coil or magnet. The induced current is found to be the highest when the direction of motion of the coil is at right angles to the magnetic field.
Question. The change in magnetic field lines in a coil is the cause of induced electric current in it. Name the underlying phenomenon.
Ans. The change in magnetic field lines in a coil is the cause of induced current in it and the phenomenon is electromagnetic induction.
Question. A current through a horizontal power line flows in west to east direction.
(A) What is the direction of the magnetic field at a point directly above it and at a point directly below it?
(B) Name the rule used to determine:
(1) The direction of force when a current carrying wire is placed in a strong magnetic field.
(2) magnetic field in a current carrying conductor. [Diksha]
Ans. (A) 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 above the wire is from south to north
or anticlockwise direction. The direction of magnetic field at a point directly below the wire is north to south or clockwise direction.
(B) (1) According to Fleming’s left-hand rule, hold the forefinger, the centre finger and the thumb of your left hand at right angles to one another. Adjust your hand in such a way that
the forefinger points in the direction of the magnetic field and the centre finger points in the direction of current, then the direction in which the thumb points, gives the direction of the force acting on the conductor.
(2) According to Maxwell’s right hand thumb rule: Imagine that you are holding the current-carrying wire in your right hand so that your thumb points in the direction of current, then the direction in which your fingers encircle the wire will give the direction of the magnetic field lines around the wire.
Question. A coil of insulated copper wire is connected to a galvanometer. What would happen if a strong bar magnet is
(A) pushed into the coil?
(B) withdrawn from inside the coil?
(C) held stationary inside the coil?
Give justification for each observation.
Ans. (A) When a strong bar magnet is pushed into a coil of insulated copper wire connected to a galvanometer, we will observe a deflection in the galvanometer in one direction.
This is because current is induced in the coil in a particular direction (either clockwise or anti clockwise) due to an increasing magnetic field. This phenomenon is called electromagnetic induction.
(B) When the magnet is withdrawn from the coil, we will again observe a deflection in the galvanometer but in direction opposite to that observed in (A). This is because current is again induced in the coil but in an opposite direction due to a decreasing magnetic field.
(C) No deflection will be observed when the coil is held stationary as no current will be induced since magnetic field is not changing.
Magnetic Effects of Electric current WORKSHEET 2 SECTION A CONCEPTUAL QUESTIONS
Why do two magnetic field lines never intersect each other?
Draw a diagram to show magnetic field lines around a bar magnet.
List the factors on which the magnetic field produced by a current carrying straight conductor depends.
What is the frequency of AC current used in India?
The magnetic field in a given region is uniform. Draw a diagram to represent it
Mention two ways to increase the strength field of a solenoid.
What is meant by a magnetic field? Mention two parameters that are necessary to describe it completely.
Name and state the rule which determine the direction of magnetic field around a straight current carrying conductor.
Mention the provision of two different current ratings in our domestic circuits.
State the direction of magnetic field in the following case.
(a) Two magnets are lying side as shown below. Draw magnetic field line between poles P and Q.
(b) What does the degree of closeness of magnetic field lines near the poles signify?
Write one application of each of the following:
(a) Right hand thumb rule
(b) Fleming ‘s left hand rule
(c) Fleming’s right hand rule
A current carrying aluminium rod AB is placed in a magnetic field. The direction of magnetic field is vertically upward. How do you think the displacement of rod AB will be affected if
a) The current in the rod AB is increased
b) A stronger horse shoe magnet is used
c) Length of the rod AB is increased?
List out the differences between A.C and D.C.
Under what condition is the force experienced by a conductor placed in a magnetic field i) maximum ii) minimum
Mention the colour convention for live, neutral and earth wires.
Explain whether an alpha particle( which is a positively charged particle) will experience any force in a magnetic field if:
(i) It is placed in the field at rest
(ii) It moves in the magnetic field parallel to field lines
(iii) It moves in the magnetic field perpendicular to field lines.
Distinguish between overloading and short circuiting in domestic circuit.
Draw the schematic diagram of domestic circuit with a bulb and a fan.
A current carrying conductor produces a magnetic field around it. Is there a similar magnetic field produced around a thin beam of (i) electrons (ii) neutrons. Justify your answer.
List two precautions two avoid overloading in the domestic circuit.
What are the ratings of fuse wires used in domestic circuit Section B Numerical problems An electric motor of 1.5kW power rating is operated in a domestic electric circuit of current rating 5A. What would happen when it is switched ON? Give reason for your answer.
A circuit has a fuse of 5A. Find the maximum number of 100 W, 220V lamps that can be used in this circuit.
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