Entry Test MCQ :: Electromagnetism
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11. |
The magnetic force experienced by a charge particle moving in a magnetic field will be minimum when it moves |
A. |
perpendicular to the field |
B. |
parallel to the field |
C. |
inclined parallel to the field |
D. |
at an angle of 45? |
Answer: Option B
Explanation:
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12. |
The relationship between Tesla and smaller unit Gauss of magnetic induction is given by |
A. |
1T = 103 G |
B. |
1T = 10-4 G |
C. |
1T = 10-2 G |
D. |
1T = 104 G |
Answer: Option D
Explanation:
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13. |
If the plane of the rectangular coil is parallel to the magnetic field (i.e radial magnetic field) the torque on the coil is |
A. |
? = NIAB cos? |
B. |
? = NIAB sin? |
C. |
? = NIAB tan? |
D. |
? = NIAB |
Answer: Option D
Explanation:
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14. |
SI unit of flux density is |
Answer: Option A
Explanation:
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15. |
Magnetic flux and flux density are related by |
A. |
magnetic flux = flux density / area |
B. |
magnetic flux = flux density x area |
C. |
flux density = magnetic flux area |
D. |
flux density = magnetic flux x area |
Answer: Option B
Explanation:
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16. |
The standard vector symbol for flux density is |
Answer: Option D
Explanation:
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17. |
The charged particle enters the uniform magnetic field in such a way that its initial velocity is not perpendicular to the field the orbit will be |
A. |
a circle |
B. |
a spiral |
C. |
an ellipse |
D. |
helix |
Answer: Option D
Explanation:
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18. |
An electron enters a region where the electric field E is perpendicular to the magnetic field B. It will suffer no deflection if |
A. |
E = BeV |
B. |
B = eE/V |
C. |
E = BV |
D. |
E = BeV/2 |
Answer: Option C
Explanation:
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19. |
Value of permeability of tree space in SI units is |
A. |
4?x10-9 WbA-1m-1 |
B. |
4?x10-7 WbA-1m-1 |
C. |
4?x10-10 WbA-1m-1 |
D. |
4?x10-8 WbA-1m-1 |
Answer: Option B
Explanation:
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20. |
The magnetic field strength of solenoid is |
A. |
B = ??NI |
B. |
B = ??N/I |
C. |
B = ??nI |
D. |
both (b) and (c) |
Answer: Option D
Explanation:
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