The Following Section consists of Multiple Choice Questions on Magnetism and Electromagnetism.
Quiz-summary
0 of 20 questions completed
Questions:
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
Information
Magnetism and Electromagnetism MCQ
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading...
You must sign in or sign up to start the quiz.
You have to finish following quiz, to start this quiz:
Results
0 of 20 questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 points, (0)
Average score |
|
Your score |
|
Categories
- Engineering 0%
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- Answered
- Review
-
Question 1 of 20
1. Question
1 pointsWhen the speed at which a conductor is moved through a magnetic field is increased, the induced voltage
Correct
Incorrect
-
Question 2 of 20
2. Question
1 pointsThe induced voltage across a coil with 250 turns that is located in a magnetic field that is changing at a rate of 8 Wb/s is
Correct
Incorrect
-
Question 3 of 20
3. Question
1 pointsFor a given wirewound core, an increase in current through the coil
Correct
Incorrect
-
Question 4 of 20
4. Question
1 pointsIf the cross-sectional area of a magnetic field increases, but the flux remains the same, the flux density
Correct
Incorrect
-
Question 5 of 20
5. Question
1 pointsWhen the current through the coil of an electromagnet reverses, the
Correct
Incorrect
-
Question 6 of 20
6. Question
1 pointsWhat is the reluctance of a material that has a length of 0.07 m, a cross-sectional area of 0.014 m2, and a permeability of 4,500 Wb/At × m?
Correct
Incorrect
-
Question 7 of 20
7. Question
1 pointsA coil of wire is placed in a changing magnetic field. If the number of turns in the coil is decreased, the voltage induced across the coil will
Correct
Incorrect
-
Question 8 of 20
8. Question
1 pointsThe unit for reluctance is
Correct
Incorrect
-
Question 9 of 20
9. Question
1 pointsIf the steel disk in a crankshaft position sensor has stopped with the tab in the magnet’s air gap, the induced voltage
Correct
Incorrect
-
Question 10 of 20
10. Question
1 pointsA basic one-loop dc generator is rotated at 90 rev/s. How many times each second does the dc output voltage peak (reach maximum)?
Correct
Incorrect
-
Question 11 of 20
11. Question
1 pointsThe unit for permeability is
Correct
Incorrect
-
Question 12 of 20
12. Question
1 pointsWhat is the magnetomotive force in a 75-turn coil of wire when there are 4 A of current through it?
Correct
Incorrect
-
Question 13 of 20
13. Question
1 pointsThe direction of a magnetic field within a magnet is
Correct
Incorrect
-
Question 14 of 20
14. Question
1 pointsWhen the north poles of two bar magnets are brought close together, there will be
Correct
Incorrect
-
Question 15 of 20
15. Question
1 pointsThe ability of a material to remain magnetized after removal of the magnetizing force is known as
Correct
Incorrect
-
Question 16 of 20
16. Question
1 pointsThe induced voltage across a stationary conductor in a stationary magnetic field is
Correct
Incorrect
-
Question 17 of 20
17. Question
1 pointsAn electromagnetic field exists only when there is
Correct
Incorrect
-
Question 18 of 20
18. Question
1 pointsWhen a solenoid is activated, the force that moves the plunger is
Correct
Incorrect
-
Question 19 of 20
19. Question
1 pointsWhat is the magnetomotive force (mmf) of a wire with 8 turns carrying three amperes of current?
Correct
Incorrect
-
Question 20 of 20
20. Question
1 pointsIf a loop in a basic dc generator suddenly begins rotating at a faster speed, the induced voltage
Correct
Incorrect
Quiz-summary
0 of 20 questions completed
Questions:
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
Information
Magnetism and Electromagnetism MCQ 2
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading...
You must sign in or sign up to start the quiz.
You have to finish following quiz, to start this quiz:
Results
0 of 20 questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 points, (0)
Average score |
|
Your score |
|
Categories
- Engineering 0%
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- Answered
- Review
-
Question 1 of 20
1. Question
1 pointsPermeability is the inverse equivalent of which electrical term?
Correct
Incorrect
-
Question 2 of 20
2. Question
1 pointsWhich electromagnetic device uses brushes and a commutator?
Correct
Incorrect
-
Question 3 of 20
3. Question
1 pointsWhat is the flux density of a magnetic field whose flux is 3000 µWb and cross-sectional area is 0.25 m2?
Correct
Incorrect
-
Question 4 of 20
4. Question
1 pointsHow much flux is there in a magnetic field when its flux density is 5000 mu.gifT and its cross-sectional area is 300 mm2?
Correct
Incorrect
-
Question 5 of 20
5. Question
1 pointsWhat are the effects of moving a closed wire loop through a magnetic field?
Correct
Incorrect
-
Question 6 of 20
6. Question
1 pointsThe Hall effect
Correct
Incorrect
-
Question 7 of 20
7. Question
1 points“Series” and “parallel” as applied to dc motors refer to
Correct
Incorrect
-
Question 8 of 20
8. Question
1 pointsThe component that produces power in an electromagnetic generator is called the
Correct
Incorrect
-
Question 9 of 20
9. Question
1 pointsWhat is the magnetomotive force in a 150-turn coil of wire with 2 A flowing through it?
Correct
Incorrect
-
Question 10 of 20
10. Question
1 pointsA Hall effect sensor
Correct
Incorrect
-
Question 11 of 20
11. Question
1 pointsWhich electromagnetic device has a flexible cone?
Correct
Incorrect
-
Question 12 of 20
12. Question
1 pointsWhat is the reluctance of a material that has a length of 0.045 m, a cross-sectional area of 0.015 m2 , and a permeability of 2500 µWb/At·m?
Correct
Incorrect
-
Question 13 of 20
13. Question
1 pointsThe unit of flux density is known as
Correct
Incorrect
-
Question 14 of 20
14. Question
1 pointsWhat do you call the characteristic of a magnetic material whereby a change in magnetization lags the application of a magnetizing force?
Correct
Incorrect
-
Question 15 of 20
15. Question
1 pointsWhich electromagnetic device has a movable iron core called a plunger?
Correct
Incorrect
-
Question 16 of 20
16. Question
1 pointsWhich electromagnetic device contains an armature?
Correct
Incorrect
-
Question 17 of 20
17. Question
1 pointsThe direction of induced current is given by?
Correct
Incorrect
-
Question 18 of 20
18. Question
1 pointsThe energy resides in a current carrying conductor in the form of
Correct
Incorrect
-
Question 19 of 20
19. Question
1 pointsIf positively charged particles enter with high velocity from the sky towards the earth, then the earths magnetic field will deflect them towards
Correct
Incorrect
-
Question 20 of 20
20. Question
1 pointsThe motional e.m.f. induced in a coil is independent of
Correct
Incorrect
Quiz-summary
0 of 20 questions completed
Questions:
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
Information
Magnetism and Electromagnetism MCQ 3
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading...
You must sign in or sign up to start the quiz.
You have to finish following quiz, to start this quiz:
Results
0 of 20 questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 points, (0)
Average score |
|
Your score |
|
Categories
- Engineering 0%
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- Answered
- Review
-
Question 1 of 20
1. Question
1 pointsTransformers are used in circuits containing
Correct
Incorrect
-
Question 2 of 20
2. Question
1 pointsWhich of the following is magnetic material:
Correct
Incorrect
-
Question 3 of 20
3. Question
1 pointsThe attractive power. of a bar magnet is maximum. at:
Correct
Incorrect
-
Question 4 of 20
4. Question
1 pointsThree pieces of metals X, Y and Z are tested for magnetism. Y attracts Mil: X and G X and Z d, attract each other Which of the following is correct?
Correct
Incorrect
-
Question 5 of 20
5. Question
1 pointsA Neutral point is found where:.
Correct
Incorrect
-
Question 6 of 20
6. Question
1 pointsIt is learnt that all magnetic substances lose their magnetism when:
Correct
Incorrect
-
Question 7 of 20
7. Question
1 pointsIf magnet is broken into two equal pieces the pole strength of each half will be:
Correct
Incorrect
-
Question 8 of 20
8. Question
1 pointsPermanent magnet attracts:
Correct
Incorrect
-
Question 9 of 20
9. Question
1 pointsA mariner’s compass is used:
Correct
Incorrect
-
Question 10 of 20
10. Question
1 pointsA steel bar can be magnetized by which one of the following methods:
Correct
Incorrect
-
Question 11 of 20
11. Question
1 pointsWho first advanced the molecular theory of magnetism?
Correct
Incorrect
-
Question 12 of 20
12. Question
1 pointsThe process of imparting the properties of the natural magnets to the other bodies is known as:
Correct
Incorrect
-
Question 13 of 20
13. Question
1 pointsSubstances, which are strongly attracted by a magnet and can also be magnetised, are called:
Correct
Incorrect
-
Question 14 of 20
14. Question
1 pointsSubstances, which are repelled by a magnet, are known as: .
Correct
Incorrect
-
Question 15 of 20
15. Question
1 pointsThe force of repulsion b/w two magnetic poles depends upon:
Correct
Incorrect
-
Question 16 of 20
16. Question
1 pointsCopper is a:
Correct
Incorrect
-
Question 17 of 20
17. Question
1 pointsWhen an iron piece is magnetised its length:
Correct
Incorrect
-
Question 18 of 20
18. Question
1 pointsMagnetism at the centre of the bar magnet is:
Correct
Incorrect
-
Question 19 of 20
19. Question
1 pointsWhich one of the following is considered to be the best method for making a magnet?
Correct
Incorrect
-
Question 20 of 20
20. Question
1 pointsA substance, which is feebly attracted by a magnet, is known as:
Correct
Incorrect
Quiz-summary
0 of 15 questions completed
Questions:
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
Information
Magnetism and Electromagnetism MCQ 4
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading...
You must sign in or sign up to start the quiz.
You have to finish following quiz, to start this quiz:
Results
0 of 15 questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 points, (0)
Average score |
|
Your score |
|
Categories
- Engineering 0%
- General Knowledge 0%
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- Answered
- Review
-
Question 1 of 15
1. Question
1 pointsWhen the current through a coil reverses direction, the magnetic field around the coil _____.
Correct
Incorrect
-
Question 2 of 15
2. Question
1 pointsThe flux density is ___ when the magnetic flux is 9 µWb and the cross-sectional area of the magnetic field is 5 × 10–3 m2
Correct
Incorrect
-
Question 3 of 15
3. Question
1 pointsAfter the magnetizing force has been removed, the ratio of the remaining magnetic flux to the saturated magnetic flux is called _____________
Correct
Incorrect
-
Question 4 of 15
4. Question
1 pointsYou can determine the direction of the lines of force surrounding a conductor by using _____.
Correct
Incorrect
-
Question 5 of 15
5. Question
1 pointsA group of force lines going from the north pole to the south pole of a magnet is called the magnetic ___.
Correct
Incorrect
-
Question 6 of 15
6. Question
1 pointsThe induced voltage across a stationary conductor in a stationary magnetic field ___.
Correct
Incorrect
-
Question 7 of 15
7. Question
1 pointsWhen the speed at which a conductor is moved through a magnetic field is increased, the induced voltage will _____.?
Correct
Incorrect
-
Question 8 of 15
8. Question
1 points___ is the ability of a material to remain magnetized after removal of the magnetizing force.
Correct
Incorrect
-
Question 9 of 15
9. Question
1 pointsFerromagnetic materials have minute magnetic ___ created within their atomic structure by the orbital motion and spin of electrons.
Correct
Incorrect
-
Question 10 of 15
10. Question
1 pointsThe ____________ is an electromagnetic device that contains a coil rotating on a jeweled bearing mount.
Correct
Incorrect
-
Question 11 of 15
11. Question
1 pointsThe movable part in a relay is the _____.
Correct
Incorrect
-
Question 12 of 15
12. Question
1 pointsThe unit of magnetic flux density is the weber.
Correct
Incorrect
-
Question 13 of 15
13. Question
1 pointsThe ability of a material to maintain a magnetized state (without the presence of a magnetizing force) is called retentivity.
Correct
Incorrect
-
Question 14 of 15
14. Question
1 pointsMagnetic flux flows from the north pole to the south pole within the magnet.
Correct
Incorrect
-
Question 15 of 15
15. Question
1 pointsThe ability of a material to maintain a magnetized state (without the presence of a magnetizing force) is called hysteresis.
Correct
Incorrect