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NCERT Solutions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current - Learn CBSE
Back to Top NCERT Solutions for Class Chapter Q2: What does �a hydrocarbon form of life� mean? Answer: Hydrocarbon is a compound of hydrogen and carbon.� What is surprising is that there the language for communication is same as in few of western countries on Earth and the global language of today, English. Q8: Why do you think Skander started this correspondence with Pen Pal? Answer: Skander is a curious one, whose thirst for knowledge is much more as compared to any common being. ���� ������������� ��� ���� � Vedantu Class 9 & 10YouTube.� Surface Area and Volume | Class 9 IX CBSE Mathematics - �����������������: myboat305 boatplans ����������. Download NCERT Solutions for other subjects here. Download NCERT Solutions for Class 10 Science All Ncert Solutions For Class 10th Science Chapter 4 Visa chapters here. CBSE Class 10 Science Chapter 13 � Magnetic Effects of Electric Current NCERT Solutions. NCERT Class 10 science chapter 13, comes under the theme of how things work. Our subject matter experts made solutions for chapter 13, the magnetic effects of electric current for this chapter.� Thus, the solutions and practical activities here in the chapter help the learners understand the magnetic field and right-hand thumb rule a solenoid and circular loop. Sub-topics covered under NCERT Solutions for Class 10 Science Chapter Ex � Magnetic Field and Field Lines. Ex � Magnetic Field Due to a Current-carrying Conductor.

So the candidates who want to secure a decent grade in class 10 board exams can refer to this article and solve magnetic effect of electric current science class 10 NCERT solutions. Question 1 Why does a compass needle get deflected when brought near a bar magnet? Answer: The magnetic field of the magnet exerts force on both the poles of the compass needle.

The forces experienced by the two poles are equal and opposite. These two forces form a couple which deflects the compass needle. Question 1 Draw magnetic field lines around a bar magnet. Question 2 List the properties of magnetic lines of force.

Answer: Properties of magnetic lines of force :. Answer: This is due to the fact that the resultant force on a north pole at any point can be only in one direction.

But if the two magnetic field lines intersect one another, then the resultant force on north pole placed at the point of intersection will be along two directions, which is not possible. Question 1 Consider a circular loop of wire lying on the plane of the table. Let the current pass through the loop clockwise.

Apply the right hand rule to find out the direction of the magnetic field inside and outside the loop. Answer: As shown in figure alongside, Ncert Solutions For Class 10th English Chapter 3 Map each section of wire produces its concentric set of lines of force. By applying right Ncert Solutions For Class 10th Science Chapter 9 Online hand thumb rule, we find that all the sections produce magnetic field downwards at all points inside the loop while at the outside points, the field is directed upwards.

Therefore, the magnetic field acts normally into the plane of the paper at the points inside the loop and normally out of the plane of paper at points outside the loop. Question 2 The magnetic field in a given region is uniform. Draw a diagram to represent it. For example, the uniform magnetic field which exists inside a current-carrying solenoid can be represented by parallel straight lines pointing from its S-pole to N-pole as shown in figure.

Question 3 Choose the correct option. The magnetic field inside a long straight solenoid-carrying current i is zero ii decreases as we move towards its end iii increases as we move towards its end iv is the same at all points Answer: iv Is the same at all points.

Question 1 Which of the following property of a proton can change while it moves freely in a magnetic field. There may be more than one correct answer. Question 2 In Activity Answer: i When the current in the rod AB is increased, force exerted on the conductor increases, so the displacement of the rod increases.

This increases the force exerted on the rod and the displacement of the rod. Question 3 A positively-charged particle alpha particle projected towards west is deflected towards north by a magnetic field. The direction of magnetic field is : i towards south ii towards east iii downward iv upward Answer: iv Upward.

Here, the positively charged alpha particles are moving towards west, so the direction of current is towards east.

The deflection is towards north, so the force is towards north, so, we are given that i direction of current is towards west ii direction of force is towards north.

Let us now hold the forefinger, middle finger and thumb of our left-hand at right angles to one another. Adjust the hand in such a way that our mid finger points towards west in the direction of current and thumb points towards north in the direction of force. Now, if we look at our forefinger, it will be pointing upward. Because the direction of forefinger gives the direction of magnetic field, therefore, the magnetic field is in the upward direction.

Question 2 What is the principle of an electric motor? When a rectangular coil is placed in a magnetic field and current is passed through it, a force acts on the coil which rotates it continuously. When the coil rotates, the shaft attached to it also rotates.

In this way the electrical energy supplied to the motor is converted into the mechanical energy of rotation. Question 3 What is the role of the split ring in an electric motor? Answer: The split ring reverses the direction of current in the armature coil after every half rotation, i. The reversed current reverses the direction of the forces acting on the two arms of the armature after every half rotation.

This allows the armature coil to rotate continuously in the same direction. Question 1 Explain different ways to induce current in a coil. Answer: Different ways to induce current in a coil are :.

Question 1 State the principle of an electric generator. Answer: The electric generator works on the principle that when a straight conductor is moved in a magnetic field, then current is induced in the conductor. In an electric generator, a rectangular coil is made to rotate rapidly in the magnetic field between the poles of a horse-shoe type magnet.

When the coil rotates, it cuts the magnetic field lines due to which a current is produced in the coil. Question 2 Name some sources of direct current. Answer: Some of the sources of direct current are dry cells, button cells, lead accumulators. Question 3 Which sources produce alternating current?

Answer: Alternating current is produced by AC generators of nuclear power plants, thermal power plants, hydroelectric power stations, etc. Question 4 Choose the correct option : A rectangular coil of copper wires is rotated in a magnetic field. The direction of the induced current changes once in each: i two revolution ii one revolution iii half revolution iv one-fourth revolution Answer: iii Half revolution.

Question 1 Name two safety measures commonly used in electric circuits and appliances. Answer: i Earthing and ii Electric fuse. Question 2 An electric oven of 2 kW power rating is operated in a domestic electric circuit V that has a current rating of 5 A. What result do you expect? Answer: The electric oven draws a current given by Thus the electric oven draws current much more than the current rating 5 A. That is the circuit is overloaded.

Due to excessive current, the fuse wire will blow and the circuit will break. What precautions should be taken to avoid the overloading of domestic electric circuits?

To avoid the overloading of domestic electric circuits, the following precautions should be taken : i The wires used in the circuit must be coated with good insulating materials like PVC, etc. Question 1 Which of the following correctly describes the magnetic field near a long straight wire? Question 2 The phenomenon of electromagnetic induction is i the process Ncert Solutions For Class 10th Science Chapter 6 Eng of charging a body ii the process of generating magnetic field due to a current passing through a coil iii producing induced current in a coil due to relative motion between a magnet and the coil iv the process of rotating a coil of an electric motor Answer: iii Producing induced current in a coil due to relative motion between a magnet and the coil.

Question 3 The device used for producing electric current is called a i generator ii galvanometer iii ammeter iv motor Answer: i Generator. Question 4 The essential difference between an AC generator and a DC generator is that i AC generator has an electromagnet while a DC generator has permanent magnet ii DC generator will generate a higher voltage iii AC generator will generate a higher voltage iv AC generator has slip rings while the DC generator has a commutator Answer: iv AC generator has slip rings while the DC generator has a commutator.

Question 5 At the time of short circuit, the current in the circuit i reduces substantially ii does not change iii increases heavily iv varies continuously Answer: iii Increases heavily. Question 6 State whether the following statements are True or False. Answer: i False ii True iii True iv False. Question 7 List three sources of magnetic fields. Answer: i Current carrying conductor ii Electromagnets iii Permanent magnets.

Question 8 How docs 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? Answer: A solenoid behaves like a magnet in the following ways. To determine the north and south poles, we bring N-pole of the bar magnet near one end of the solenoid.

If there is an attraction, then that end of the solenoid has south polarity and the other has north polarity. If there is a repulsion, then that end of the solenoid has north polarity and the other end has south polarity because similar poles repel each other.

Question 9 When is the force experienced by a current-carrying conductor placed in a magnetic field largest? Answer: When the conductor carries current in a direction perpendicular to the direction of the magnetic field, the force experienced by the conductor is largest. Question 10 Imagine that you are sitting in a chamber with your back to one wall. An electron beam, moving horizontally from back wall towards the front wall, is deflected by a strong magnetic field to your right side.

What is the direction of magnetic field? Answer: Here the electron beam is moving from our back wall to the front wall, so the direction of current will be in the opposite direction, from front wall towards back wall or towards us.

The direction of deflection or force is towards our right side. We now know two things :. Let us now hold the forefinger, middle finger and thumb of our left hand at right angles to one another. We now adjust the hand in such a way that our centre finger points towards us in the direction of current and thumb points towards right side in the direction of force.

Now, if we look at our forefinger, it will be pointing vertically downwards. Since the direction of forefinger gives the direction of magnetic field, therefore, the magnetic field is in the vertically downward direction. Question 11 Draw a labelled diagram of an electric motor. Explain its principle and working. What is the function of a split ring in an electric motor? Answer: Electric Motor : The device used to convert electrical energy to mechanical energy is called Electric Motor.

It is used in fans, machines, etc. The two forces in the opposite sides are equal and opposite. Since they act in different lines they bring rotational motion. According to this law, it is found that the force exerted on the part AB, pushes the coil downwards.

While the force exerted on the part CD pushes it upwards.


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