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1. The scientist who discovered the deflection of a compass needle due to current was
A. Michael Faraday
B. Hans Christian Oersted
C. Andre-Marie Ampere
D. James Clerk Maxwell
2. The unit of magnetic field strength named in honor of Oersted is
A. Tesla
B. Gauss
C. Oersted
D. Weber
3. The north-seeking end of a compass needle is called
A. South pole
B. Magnetic field
C. North pole
D. Neutral pole
4. Like magnetic poles
A. Attract
B. Repel
C. Neutralize
D. Show no effect
5. The region around a magnet where its effect can be felt is called
A. Magnetic flux
B. Magnetic field
C. Magnetic domain
D. Electromagnet
6. Magnetic field lines emerge from
A. South pole and enter north pole
B. North pole and merge at south pole
C. Both poles equally
D. The center of magnet only
7. Inside a magnet, the direction of field lines is
A. From north to south
B. From south to north
C. Random
D. Circular
8. Magnetic field lines are always
A. Open curves
B. Straight lines
C. Closed curves
D. Infinite
9. Two magnetic field lines never intersect because
A. They cancel each other
B. Compass would point in two directions
C. They weaken the field
D. They attract each other
10. The pattern of magnetic field lines around a straight current-carrying conductor is
A. Straight lines
B. Concentric circles
C. Parallel lines
D. Zigzag
11. The strength of magnetic field due to a straight conductor increases when
A. Current decreases
B. Distance increases
C. Current increases
D. Resistance increases
12. Magnetic field strength decreases when
A. Distance increases from the conductor
B. Current increases
C. Voltage increases
D. Wire thickness decreases
13. The rule used to find direction of magnetic field around a conductor is
A. Fleming’s left-hand rule
B. Right-hand thumb rule
C. Maxwell’s left-hand rule
D. Fleming’s right-hand rule
14. Right-hand thumb rule is also called
A. Ampere’s rule
B. Maxwell’s corkscrew rule
C. Fleming’s rule
D. Faraday’s rule
15. The magnetic field produced by a circular loop at the centre appears as
A. Zigzag lines
B. Straight lines
C. Random lines
D. Broken lines
16. The field at the centre of a coil with n turns is
A. Same as one turn
B. Half of one turn
C. n times that of one turn
D. Zero
17. A coil of many turns wrapped in cylindrical shape is called
A. Magnet
B. Solenoid
C. Inductor
D. Transformer
18. The magnetic field inside a solenoid is
A. Non-uniform
B. Zero
C. Strong and uniform
D. Weak and circular
19. One end of a solenoid behaves as
A. South pole only
B. North or south pole
C. Neutral point
D. Weak pole
20. A solenoid used to magnetize a material produces
A. Bar magnet
B. Permanent magnet
C. Electromagnet
D. Induced coil
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