# Magnetic Effect Of Electric Current Class 10 Questions And Answers Pdf

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Published: 02.04.2021  Magnetic effect of current was discovered by a Oersted b Faraday c Bohr d Ampere. Answer: a Explanation: a Oersted showed that electricity and magnetism were related phenomena. Inside the magnet, the field lines moves a from north to south b from south the north c away from south pole d away from north pole. Answer: a Explanation: a Magnetic field inside the magnet moves from south to north pole.

## Important Questions for CBSE Class 10 Science Chapter 13 - Magnetic Effects of Electric Current

Magnetic effect of current was discovered by a Oersted b Faraday c Bohr d Ampere. Answer: a Explanation: a Oersted showed that electricity and magnetism were related phenomena. Inside the magnet, the field lines moves a from north to south b from south the north c away from south pole d away from north pole.

Answer: a Explanation: a Magnetic field inside the magnet moves from south to north pole. Relative strength of magnetic field at a point in the space surrounding the magnet is shown by the a length of magnet b thickness of magnet c degree of closeness of the field. Which of the following statement is not correct about the magnetic field?

Answer: Explanation: d Outside the magnet, magnetic field line emerges from North-pole and moves towards south-pole. By which instrument, the presence of magnetic field be determined? Answer: d Explanation: a With the help of magnetic field, one can find the presence of magnetic field in a region by observing its deflection.

The pattern of the magnetic field produced by the straight current carrying conducting wire is a in the direction opposite to the current b in the direction parallel to the wire c circular around the wire d in the same direction of current.

Answer: a Explanation: c Magnetic field line around a current carrying straight conductor is represented by concentric circles. The strength of magnetic field around a current carrying conductor is a inversely proportional to the current but directly proportional to the square of the distance from wire.

A current through a horizontal power line flows from south to North direction. The direction of magnetic field line 0. The nature of magnetic field line passing through the centre of current carrying circular loop is a circular b ellipse c parabolic d straight line. Answer: d Explanation: d magnetic field line at the centre of current carrying loop appears as a straight line. The strength of each of magnet reduces to half when it cut along its length into the equal parts magnetic field strength of a solenoid.

Polarity of solenoid can be determined by a use of compass needle b Right hand thumb rule c fleming left hand rule d either a or b. Answer: d Explanation: d both a and b can be use to determine the polarity of solenoid.

The factors on which one magnetic field strength produced by current carrying solenoids depends are a Magnitude of current b Number of turns c Nature of core material d All of the above. A soft iron bar is introduced inside the current carrying solenoid. The magnetic field inside the solenoid a will decrease b will remains same c will increase d will become zero. Answer: c Explanation: c Soft iron inside the current carrying solenoid act as an electromagnet.

Answer: a Explanation: a If the current direction is parallel to the magnetic field, then there will no force on the conductor exerted by the magnetic field. A positive charge is moving upwards in a magnetic field directed towards north. The particle will be deflected towards a west b north c south d east. Which of the following factors affect the strength of force experience by a current carrying conduct in a uniform magnetic field?

In electric motor, to make the coil rotating continuously in the same direction, current is reversed in the coil after every half rotation by a device called a carbon brush b commutator c slip ring d armature. Answer: b Explanation: b A device that reverses the direction of current in the arms of armature through a circuit is called commutation.

The condition for the praenomen of electromagnetic induction is that there must be a relative motion between a the galvanometer and magnet b the coil of wire and galvanometer c the coil of wire and magnet d the magnet and galvanometer. Answer: c Explanation: c The relative motion between the magnet and coil of wire causes change in magnetic field lines linked with the coil to produces induced current if the circuit is closed.

The instrument that use to defect electric current in the circuit is known as a electric motor b A. C generator c galvanometer d none of the above. Answer: a Explanation: a A galvanometer is an instrument that can direct the presence of current in a circuit. We can induce the current in a coil by a moving the coil in a magnetic field b by changing the magnetic field around it c by changing the orientation of the coil in the magnetic field d All of above.

Answer: a Explanation: a The method can be used to induce the potential difference across the ends of a coil and hence induce current. A magnet is moved towards a coil i quickly ii slowly. Answer: a Explanation: a When magnet is moved quickly, more will be the changing magnetic field strength and hence larger is the induced potential difference.

C generator works on the principle of a force experience by a conductor in magnetic field b electromagnetic induction c electrostatic d force experience by a charge particle in electric field. Answer: a Explanation: a Generator works on principle of electromagnetic induction. Answer: b Explanation: b Electric motor employs Fleming left hand rule while for generator, Fleming right-hand rule is used. Answer: c Explanation: c electric generator works on the basis of electromagnetic induction.

If the current values periodically from zero to a maximum value, back to zero and then reverses its direction, the current is a direct b alternative c pulsating d none of the above. Answer: b Explanation: b The alternating current reverse its direction periodically.

The main advantage of A. C power transmission over D. Answer: a Explanation: a AC transmit over a long distance without much loss of energy as compare to DC. Which among of these are the main characteristics of fuse element? Answer: d Explanation: d Fuse wire must have all the characteristic to prevent from a possible damage.

Overloading is due to a Insulation of wire is damaged b fault in the appliances c accidental hike in supply voltage d All of the above. If the key in the given arrangement is taken out the circuit is made open and magnetic field lines are drawn over the horizontal plane ABCD, the lines are a concentric circles b elliptical in shape c straight lines parallel to each other d concentric circles near the point O but of elliptical shapes as we go away from it [NCERT Exemplar Problems].

Answer: a Explanation: a Magnetic field lines around a straight current carrying conductor are in the form of concentric circle. For a current in a long straight solenoid N-pole and S-pole are created at the two ends. Among the following statements, the incorrect statement is [NCERT Exemplar Problems] 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.

Answer: c Explanation: c A solenoid behaves like a bar magnet. Hence the pattern of magnetic field associated with solenoid and around the bar magnet is same. Commercial electric motors do not use a an electromagnet to rotate the armature b effectively large number of turns of conducting wire in the current carrying coil c a permanent magnet to rotate the armature d a soft iron core on which the coil is wound.

Answer: c Explanation: c Using electromagnet, the magnetic field strength further increase by increasing the current. Hence it will enhance the power of electric. The strength of magnetic field inside a long current carrying straight solenoid is a more at the ends than at the centre b minimum in the middle c same at all points d found to increase from one end to the other.

Answer: c Explanation: c A current carrying solenoid produces a uniform magnetic field inside it. To convert an AC generator into DC generator a split-ring type commutator must be used b slip rings and brushes must be used c a stronger magnetic field has to be used d a rectangular wire loop has to be used.

Answer: a Explanation: a To connect AC generator into DC generator, split ring type commutation must be used to get a unidirectional direct current. The most important safety method used for protecting home appliances from short circuiting or overloading is a earthing b use of fuse c use of stabilizers d use of electric meter.

Answer: b Explanation: b It is most important method for protecting the electrical devices from short circuiting or overloading by stopping the flow of any large electric current exceeds from its rating. What should be the core of an electromagnet?

Who has stated the Right hand Thumb Rule? What is that instrument which can detect the presence of electric current in a circuit? Magnetic Class Question Which device produces the electric current? The best material to make permanent magnets is a aluminium b soft iron c copper d alnico.

The magnetic field lines always begin from a N-pole and end on S-pole. The magnetic field is the strongest at a middle of the magnet. Material of the core of a strong magnet is a aluminium b soft iron c copper d steel.

Magnetic lines of force inside current carrying solenoid are a perpendicular to axis. A soft iron bar is introduced inside a current carrying solenoid. The magnetic field inside the solenoid a will become zero. An electric generator actually acts as a a source of electric charge. A magnetic field directed in north direction acts on an electron moving in east direction. The magnetic force on the electron will act a vertically upwards.

Switches are connected to a live wire. The most important safety method used for protecting home appliances from short-circuiting or Overloading is a earthing b use of stabilizers c use of fuse d use of electric meter. Read the statements carefully and choose the correct alternative from the following: a Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.

Assertion: Only a change in magnetic field lines linked with coil will induces current in the coil. Reason: The presence of large magnetic flux through the coil maintains a current in a closed circuit coil. Assertion: When the direction of velocity of moving charge is perpendicular to the magnetic field, it experience a maximum force. Reason: Force on the moving charge does not depends on the direction magnetic field in which it moves. Assertion: Fuse is a safety device which is installed to prevent electrical circuits and possible fires.

Reason: Fuse consist of tin-plated copper wire having low melting point, which melts and breaks the circuit if the current exceeds a safe value. Answer: a Explanation: a Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion. Assertion: Steel core is used as an electromagnet. Reason: Steel gets permanently magnetised when the current flows through the coil wound around.

Answer: d Explanation: d The statement of the Assertion is false but the Reason is true. Assertion: It is fatal to touch a live electric wire as the person gets a severe electric shock. In some cases, electric shock can even kill a person. Reason: The electric current passes through the body to the earth forming a circuit and bums the blood.

Assertion: Strength of an electromagnet depends on the magnitude of current flowing through them. Reason: Electromagnets are majorly used for lifting heavy weights. Answer: b Explanation: b The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion. ## Magnetic Effects of Electric Current-MCQ ## MCQ Questions for Class 10 Science Magnetic Effects of Electric Current with Answers

They are lines drawn in a Magnetic field along which a North magnetic pole moves. Magnetic field lines are called as Magnetic lines of force. Inside the magnet, their direction is from South pole to North pole. Therefore magnetic field lines are closed curves.

Describe an activity to show that the magnetic field lines produced when current is passed through the circular coil. Aim : To study the characteristics of magnetic field produced by a current carrying circular coil at its centre. Apparatus Required : Rectangular cardboard having two holes, Thick copper circular coils of different radii having known number of turns, key, battery, rheostat, stand, iron filings. Procedure :.

Download in PDF form or use it online without downloading free. Law Of Magnetic Poles: It states that like poles repel while unlike poles of magnets attracts each other. Thus, two N-poles repels, two S-poles repel while N-pole attracts S-pole. Chapter 1 - Chemical Reactions and Equations. Chapter 3 - Metals and Non-metals. Chapter 4 - Carbon and Its Compounds.

### CBSE Class 10 Physics Magnetic Effects of Electric Current MCQs

A magnet is a material that has two poles namely a north pole and a south pole. A magnetic field is a phenomenon that is found in the area around a magnet or an electric current that creates a magnetic force on the object placed near it. Image to be added soon. Magnetic field visually lines represent a magnetic field. A magnetic field possesses both magnitude and direction. The effect of the magnetic field is always maximum near the magnet and it decreases as the distance increases. A compass needle also acts as a bar magnet.

All these questions are provided with correct answers. A soft iron bar is inserted inside a current-carrying solenoid. The magnetic field inside the solenoid:. A current carrying conductor is held in exactly vertical direction. In order to produce a clockwise magnetic field around the conductor, the current should be passed in the conductor:. The force exerted on a current carrying wire placed in a magnetic field is zero when the angle between wire and the direction of magnetic field is:.

Thanks for visiting our website. Our aim is to help students learn subjects like physics, maths and science for students in school , college and those preparing for competitive exams. All right reserved. All material given in this website is a property of physicscatalyst. Class 10 Magnetic effects of current Extra Questions One marks questions Question 1 If the current in a wire is flowing in the vertically downward direction and a magnetic field is applied from west to east, what is the direction of force on the wire? Solution By fleming left hand rule, the direction of force will be towards south. Flemings Left hand rule is used to find the force experience by the current carrying conductor in Magnetic Field Flemings Right hand rule is used to find the direction of induced current of moving conductor in magnetic field.

Important Question for Class 10 Science Magnetic Effects of Electric Current PDF will help you in scoring more marks. Answer. Aim: To study the characteristics of magnetic field produced by a current carrying circular coil at its centre. magnetic-effects-electric-current-chapter-wise-important-questions-. Пять человек. Четверо. Всего трое. Халохот стиснул револьвер в руке, не вынимая из кармана. Он будет стрелять с бедра, направляя дуло вверх, в спину Беккера.

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