# 10th Class Physics Chapter 15 MCQs with Answers

The most interesting and important Subject of 10th Class Physics Chapter 15 MCQs is Electromagnetism. Students want to know the important questions and answers for the 10th class, to prepare it according to BISE Boards. We are providing the Solution to Student Problems. Learn magnetic effects of steady current, high voltage transmission, mutual induction, transformer, dc motor test prep for free online classes.

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## 10th Class Physics Chapter 15 MCQs with Answers

Given below are the 10th Class Physics Chapter 15 MCQs for you. Now, you can start the preparation for your SSC part II Physics exam right now. We have made hundreds of practice MCQ tests for you. 10th Class Physics Chapters include Chapter 10 – Simple Harmonic Motion and Waves, Chapter 11 – Sound, Chapter 12 – Geometrical Optics, Chapter 13 – Electrostatics, Chapter 14 – Current Electricity, Chapter 15 – Electromagnetism, Chapter 16 – Basic Electronics, Chapter 17 – Information and Communication Technology and Chapter 18 – Atomic and Nuclear Physics

### What is Electromagnetism

Electromagnetism is the science of charge and of the forces and fields associated with charge. electricity and magnetism are two aspects of electromagnetism.

Electricity and magnetism were long thought to be separate forces. It was not until the 19th century that they were finally treated as interrelated phenomena. In 1905 Albert Einstein’s special theory of relativity established beyond a doubt that both are aspects of one common phenomenon. At a practical level, however, electric and magnetic forces behave quite differently and are described by different equations. Electric forces are produced by electric charges either at rest or in motion. Magnetic forces, on the other hand, are produced only by moving charges and act solely on charges in motion.

10th Class Physics Chapter 15 MCQs: Electromagnetism

l . is a study of magnetic effects of current

(a) Electrostatics

(b) Electricity

(c) Electromagnetism

(d) Electronics

2. Who discovered that when current passes through a conductor it produces a magnetic field around it

(a) Lenz

(b) Coulomb

(c) Ampere

3. When current passes through straight conductor it produce magnetic field in the form of

(a) Straight line

(b) Concentric circles

(c) Rectangular form

(d) Parabolic shape

4. The magnetic field produced in straight current carrying conductor will stronger

(a) Near pole

(b) Near current carrying conductor

(c) Away from current carrying conductor

(d) None of these

5. The magnetic field received from the electrical conductor is weaker.

(a) Near pole

(b) Near current carrying conductor

(c) Away from current carrying conductor

(d) None of these

6. Weak iconic current that travel along the nerve can produce the

(a) Electric effect

(b) Mågnetic effect

(c) electric and magnetic effects

(d) None of these

7. MRI stands for:

(a) Mågnetic resonance imagining

(b) Mågnetic resistance and current

(c) Mågnetic resistance imagining

(d) None of these

8. The magnetic lines of force can be traced on cardboard on using:

(a) Cardboard

(b) compass needle

(c) paper

(d) magnet

9. Shape of Magnetic lines of force in straight conductor

(a) Straight

(b) Elliptical

(c) circular

(d) All of these

10. Direction of magnetic force in straight conductor is :

(a) Right hand rule

(b) Left hand rule

(c) Both a & b.

(d) None of thenl

l l . If the current is flowing from bottom end to top then the direction of magnetic lines of force will be:

(a) Anti-clockwise

(b) Clockwise

(c) Straight

(d) None of them

12. If’ the current is flowing from top to bottom then the direction of magnetic lines of force will be:

(a) Anti-Cloclovise

(b) Clockwise

(c) Straight

(d) None of these

13. A dot (•) on paper indicates that the current is directed:

(a) out of Plane

(b) toward us

(c) Into the Plane

(d) Both a & b

14. Cross(x) on paper indicates that the current is directed:

(a) Out of plane

(b) Away from us

(c) Into the Plane

(d) None of these

15. Magnetic field in most part of the coil is:

(a) Circular

(b) Straight

(c) Uniform

(d) Non-Uniform

16. A closely wound cylindrical coil of insulated wire is known as:

(a) Cylindrical coil

(b) Solenoid

(c) Cable

(d) All of them

17. Magnetic lines of force in solenoid are:

(a) Circular

(b) Parallel

(c) Non-Uniform

(d) Uniform

18. Lines of force in solenoid resemble the pattern of lines of force due to:

(a) Electromagnet

(b) Horse shoe magnet

(c)Bar magnet

(d) All of them

19. The polarity of current carrying solenoid is found by:

(a) Right Hand Rule

(b) Left Hand Rule

(c) Both a & b

(d) None of them

20. Hold down the end of the current carrying solenoid in front of you, if the direction of current flow through this end is anti-clock wise it would be:

(a) North Pole

(b) South Pole

(c) any of them

(d) None of them

21. Hold down the end of the current carrying solenoid in front of you, if the direction of current flow through this end is clockwise it would be:

(a) North Pole

(b) South Pole

(c) Any of them

(d) None of them

22. Force on current carrying.conductor in a magnetic field is found by:

(a) Right Hand Rule

(b) Left Hand Rule

(c) Both a & b

(d) None of them

23. A tool which is used to convert electrical energy into mechanical energy:

(a)Transformer

(b) A.C Generator

(c) D.C Motor

(d) All of them

24. Electromagnetic induction was discovered by:

(a) Newton

(b) Galileo

(c) Einstein

25. Who found the direction of induceå e.m.f the first time?

(b) Lenz

(c) Henry

(d) Bohr

26. The worth of induced emf is directly proportional to the rate of change bf:

(a) Current

(b) Resistance

(c) Potential

(d) Flux

27. The number of magnetic lines of force passed through any surface will

(a) emf

(b) Current

(c) Flux

(d) Resistance

28. The magnitude of induced emf depends upon the speed of:

(a) Magnet

(b) Coil

(c) Current

(d) relative Mötion

29. A tool used to convert mechanical energy into electrical energy:

(a) Transformer

(b) A.C Generator

(c) D.C Motor

(d) All of them

30. A generator works on the principle of:

(a) Electromagnetic induction

(b) Electrostatic induction

(c)Both of them

(d) None of these

31. If the Current is induced in n circuit due to change of current in an other circuit, this process is known as:

(a) electrostatic induction

(b) mutual induction

(e) self induction

(d) none of them

32. The coil of transformer in which change in current produces induced current in another coil is known as:

(a) Primary

(b) Secondary

(c) Solenoid

(d) All of them

33. A coil in which current is induced is known as:

(a) Primary

(b) Secondary

(c) Solenoid

(d) All of them

34. If the current through a coil or a circuit changes and this change induces an emf in the circuit itself, this process is known as:

(a) electrostatic induction

(b) mutual induction

(c) self induction

(d) none of them

35. An electrical device which is used to increase or decrease the value of alternating voltage:

(a) Transformer

(b) A.C Generator

(c) DC Motor

(d) All of them\

36. The coil which is connected to the alternating voltage whose value is to be altered is known as:

(a) Primary Coil

(b Secondary Coil.

(c) Solenoid

(d) All of them

37. The Coil of transformer in which alternating voltage is induced is known as:

(a) Primary Coil

(b) Secondary Coil

(c) Solenoid

(d) All of them

38. Transformer works on the principle of:

(a) Electrostatic induction

(b) Mutual Induction

(c) Self Induction

(d) All of them

39. Type of transformer which is used to increase the value of alternating voltage:

(a) step up

(b) step down

(c) step forward

d step back

40. Type of transformer which is used to decrease the value of alternating voltage:

(a) step up

(b) step down

(c) step forward

(d) step back

41. When a straight current carrying conductor is placed in a magnetic field at right angle to it, the direction of force acting on conductor is:

(a) Same as the direction of field

(b) Opposite to the direction of the field

(c) Makes an angle of 450 with the current (d) At right angle to both the field and current

42. A transformer has 100 turns in primary and 500 turns in the secondary. If 6 Volts D.C is applied across its primary, the voltage Induced across its secondary would be:

(a) OV

(b) 30V

(c) 45V

(d) 60V

43. Walk through metal detector are installed at airport and other places for

(a) Security purpose

(b) Decoration

(c) Useless purpose

(d) All of these

44. practical application of mutual induction is:

(a) Transformer

(b) Electrical

(c) Generator

(d) Diode

45. Number of turns on the primary coil is represented as:

(a) Ns

(b) Np

(c) Ns

(d) Na

46. Number of turns on secondary coil is

(a) Ns

(b) Nd

(c) Na

(d) Np

47. In step-up transformer:

(a) Vp > Ns

(b) Up > Vp

(c) Vs > Vp

(d) Vs > Ns

48. Transformer is called step-down when:

(a) Vs > Vp

(b) Vs > NS

(c) Vp < Vs

(d) Vs < Vp

49. Electric power is usually generated at places which are far from the places where it is:

(a) Consumed

(b) Produced

(c) Not needed

(d) Developed

50. Voltage of current supplied to consumers is:

(a) 230 V

(b) 240 V

(c) 210 V

(d) 220 V

51. Electromagnet is used in device

(a) Electric bell

(b) Relay

(c) Both A s and B

(d) Thermometer

52. Which is an electric switch that opens and closes under the control of another

(a) Relay

(b) Electric bell

(c) Electric circuit

(d) A. C generator