CBSE Class 10 Science Magnetic Effects Of Current Worksheet Set C

Read and download free pdf of CBSE Class 10 Science Magnetic Effects Of Current Worksheet Set C. Students and teachers of Class 10 Science can get free printable Worksheets for Class 10 Science Chapter 13 Magnetic Effect of Electric Current in PDF format prepared as per the latest syllabus and examination pattern in your schools. Class 10 students should practice questions and answers given here for Science in Class 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 Science Worksheets prepared by teachers as per the latest Science books and syllabus issued this academic year and solve important problems with solutions on daily basis to get more score in school exams and tests

Worksheet for Class 10 Science Chapter 13 Magnetic Effect of Electric Current

Class 10 Science students should download to the following Chapter 13 Magnetic Effect of Electric Current Class 10 worksheet in PDF. This test paper with questions and answers for Class 10 will be very useful for exams and help you to score good marks

Class 10 Science Worksheet for Chapter 13 Magnetic Effect of Electric Current

MCQ Questions for NCERT Class 10 Science Magnetic Effects Of Electric Current 

Question. Consider the following statements and choose the correct are:
(a) A magnet is an object which attracts pieces of iron, Nickel and cobalt
(b) Magnetic effect of electric current means that an electric current flowing in a wire produces a magnetic field around it
(c) The end of a freely suspended magnet which points towards the north direction is called the north pole of the magnet
(d) All of the above

Answer: D

Question. Two wires are placed in parallel; repulsion force and current in these two wires are “f” and “i” respectively. What will be a force if the current is doubled in each wire ?
(a) 2f
(b) f/2
(c) 2f/4
(d) 4f

Answer: D

Question. The magnetic field inside a long straight solenoid-carrying current
(a) is zero.
(b) decreases as we move towards its end.
(c) increases as we move towards its end.
(d) is the same at all points.
Answer: D

Question. Which of the following property of a proton can change while it enters freely in a magnetic field? (There may be more than one correct answer.)
(a) mass
(b) speed
(c) velocity
(d) momentum
Answer : B

Question. The phenomenon of electromagnetic induction is:
(a) The process of charging a body
(b) The process of generating magnetic field due to a current passing through a coil
(c) Producing induced current in a coil to relative motion between a magnet and the coil
(d) The process of rotating a coil of an electric motor

Answer: C

Question. Mutual induction is a process in which current is induced in the neighbouring coil if current flows in a coil. In the figure shown below: 
CBSE Class 10 Science Magnetic Effects Of Current Worksheet Set C

(a) Maximum in situation (A)
(b) Maximum in situation (B)
(c) Maximum in situation (C)
(d) Same in all situation

Answer: A

Question. A charged particle enters at right angle into a uniform field as shown. What should be the nature of charge on the particle if it begins to move in a direction pointing vertically out of the page due to its interaction with the magnetic field?
(a) Positive
(b) Negative
(c) Natural
(d) Can't decide

Answer: A

Question. For the current in a long straight solenoid N- and S-poles are created at the two ends. Among the following statements, the incorrect statement is
(a) The field lines inside the solenoid are in the form of straight lines which indicates that the magnetic field is the same at all points inside the solenoid
(b) The strong magnetic field produced inside the solenoid can be used to magnetise a piece of magnetic material like soft iron core, when placed inside the coil
(c) The pattern of magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet
(d) The N- and S-poles exchange positions when the direction of current through the solenoid is reversed
Answer : C

Question. A current flows in a wire, running between the S and N poles of a magnet lying horizontally as shown in the figure below: 
CBSE Class 10 Science Magnetic Effects Of Current Worksheet Set C

The force on the wire due the magnet is directed.
(a) From N to S
(b) From S to N
(c) Vertically downwards
(d) Vertically upwards

Answer: C

Question. A student learns that magnetic field strength around a bar magnet is different at every point which diagram shows the correct magnetic field lines around a bar magnet? 

CBSE Class 10 Science Magnetic Effects Of Current Worksheet Set C

Answer: D

Question. Which of the following is not true?
(a) Induction proceeds attractions
(b) We cannot isolate a single pole
(c) We can magnetic an iron ring
(d) A permanent magnet retains its magnetism even when heated on a flame

Answer: D

Question. A finite straight wire carries a current of 3 A, where it is a 2 m long and weighs around 240 g. If it is suspended in the mid-air by a uniform magnetic field then calculate the field B. [Acceleration due to gravity = 9.8 m/s2]
(a) 0.39 T
(b) 0.42 T
(c) 0.61 T
(d) 0.37 T

Answer: A

 

Question. Which of the following correctly describes the magnetic field near a long straight wire?
(a) The field consists of straight lines perpendicular to the wire
(b) The field consists of straight lines parallel to the wire
(c) The field consists of radial lines originating from the wire
(d) The field consists of concentric circles centred on the wire

Answer: D

Question. The phenomenon of electromagnetic induction is
(a) the process of charging a body
(b) the process of generating magnetic field due to a current passing through a coil
(c) producing induced current in a coil due to relative motion between a magnet and the coil
(d) the process of rotating a coil of an electric motor

Answer: C

Question. The device used for producing electric current is called a
(a) generator
(b) galvanometer
(c) ammeter
(d) motor

Answer: A

Question. The essential difference between an AC generator and a DC generator is that
(a) AC generator has an electromagnet while a DC generator has permanent magnet.
(b) DC generator will generate a higher voltage.
(c) AC generator will generate a higher voltage.
(d) AC generator has slip rings while the DC generator has a commutator.

Answer: D

Question. At the time of short circuit, the current in the circuit
(a) reduces substantially
(b) does not change
(c) increases heavily
(d) vary continuously

Answer: C

Question. The process of inducing a current in a coil of wire by placing it ina region of changing magnetic field is:
(a) Electrical effect
(b) Heating effect of current
(c) Magnetic effect of current
(d) Electromagnetic induction

Answer: D

Question : What are the factors affecting the strength of magnetic field at a point due to a straight conductor carrying current? 
(a) Current only
(b) Distance of the point from the wire only
(c) Current, length and distance of the wire
(d) Length of the wire only
 
Answer : C 
Explanation: The strength of magnetic field depends upon :
Amount of current flowing in the wire, more current will produce stronger field.
Length of wire , longer wire will produce stronger field.
Distance of point from the wire, more the distance of point from the wire weaker the field.
 
Question : A positively charged particle say an alpha particle projected towards west is deflected toward north by a magnetic field. The direction of the magnetic field is 
(a) Downward
(b) Upward
(c) Towards south
(d) Towards east
 
Answer : B 
Explanation: The direction of the magnetic field can be determined by the Fleming’s left hand rule. According to Fleming’s left hand rule if we stretch the thumb, the centre finger and the middle finger of our left hand such that they are mutually perpendicular to each other. If the centre finger gives the direction of current and middle finger points in the direction of magnetic field then the thumb points towards the direction of the force or motion of the conductor.
Here the direction of positively charged alpha particle is towards west this implies the direction of current is also towards west and the direction of magnetic force is towards north. Hence, according to Fleming’s left hand rule, the direction of magnetic field will be upwards.
 
Question : What type of currents is produced by most of the power stations in India? 
(a) AC current having frequency of 50 Hz
(b) AC current having frequency of 100 Hz
(c) DC current having frequency of 50 Hz
(d) DC current having frequency of 100 Hz
 
Answer : A
Explanation: Most of the power stations in India produce alternating current.
The alternating current produced in India changes its direction after every 1/100 th of a second. India got 50Hz, because it was colonized by England, which when they developed their electrical systems, choose 50 Hz.
 

State whether the following statements are true or false.

(a) An electric motor converts mechanical energy into electrical energy.
Answer: False An electric motor converts electrical energy into mechanical energy.

(b) An electric generator works on the principle of electromagnetic induction.
Answer: True

(c) The field at the centre of a long circular coil carrying current will be parallel straight lines.
Answer: True

(d) A wire with a green insulation is usually the live wire of an electric supply.
Answer: False Live wire has red insulation cover, whereas earth wire has green insulation colour in the domestic circuits.

 

Assertion and Reasoning Based Questions :

Question. Assertion: A current carrying rod is suspended between Ushaped magnet, the rod deflects.
Reason: A force is exerted on the rod due to magnetic field.
(a) If both assertion and reason are true and reason is the correct explanation of assertion.
(b) If both assertion and reason are true, but reason is not the correct explanation of assertion.
(c) If assertion is true, but reason is false.
(d) If assertion is false, but reason is true.

Answer: A

Question. Assertion: Electric Motor converts electric energy into mechanical energy.
Reason: Electric Motor is based on the principle of Fleming's right hand rule.
(a) If both assertion and reason are true and reason is the correct explanation of assertion.
(b) If both assertion and reason are true, but reason is not the correct explanation of assertion.
(c) If assertion is true, but reason is false.
(d) If assertion is false, but reason is true.

Answer: C

Question. Assertion: Galvanometer is used to measure polarity.
Reason: Galvanometer is an instrument which is used to detect current in any circuit.
(a) If both assertion and reason are true and reason is the correct explanation of assertion.
(b) If both assertion and reason are true, but reason is not the correct explanation of assertion.
(c) If assertion is true, but reason is false.
(d) If assertion is false, but reason is true.

Answer: B

Question. Assertion: Current can be induced in a coil by changing the magnetic field around it.
Reason: A Galvanometer connected to a coil can deflect either to the left or right of the zero mark.
(a) If both assertion and reason are true and reason is the correct explanation of assertion.
(b) If both assertion and reason are true, but reason is not the correct explanation of assertion.
(c) If assertion is true, but reason is false.
(d) If assertion is false, but reason is true.

Answer: B

Question. Assertion: Iron filings are kept near a magnet it gets arranged in a particular fashion.
Reason: Magnetic field is a scalar quantity.
(a) If both assertion and reason are true and reason is the correct explanation of assertion.
(b) If both assertion and reason are true, but reason is not the correct explanation of assertion.
(c) If assertion is true, but reason is false.
(d) If assertion is false, but reason is true.

Answer: C

Question. A positively-charged particle (alpha-particle) projected towards west is deflected towards north by a magnetic field. The direction of magnetic field is
(a) towards south
(b) towards east
(c) downward
(d) upward

Answer: D

Question. Assertion: A compass is kept near a wire carrying current gets deflected.
Reason: Electric current is capable of producing a magnetic effect.
(a) If both assertion and reason are true and reason is the correct explanation of assertion.
(b) If both assertion and reason are true, but reason is not the correct explanation of assertion.
(c) If assertion is true, but reason is false.
(d) If assertion is false, but reason is true.

Answer: A

Question : A rectangular coil of copper wires is rotated in a magnetic field. The direction of the induced current changes once in each
(a) two revolutions
(b) one revolution
(c) half revolution
(d) one-fourth revolution
Answer : C

Question. Assertion: Deflection of the iron filings changes when current in the conductor varies.
Reason: Magnitude of the magnetic field does not change with the magnitude of current.
(a) If both assertion and reason are true and reason is the correct explanation of assertion.
(b) If both assertion and reason are true, but reason is not the correct explanation of assertion.
(c) If assertion is true, but reason is false.
(d) If assertion is false, but reason is true.

Answer: C

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Worksheet for CBSE Science Class 10 Chapter 13 Magnetic Effect of Electric Current

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