Last Updated On 16-03-2023 - By Jeesha Sara
At some location on earth the horizontal component of earth’s magnetic field is 18×10−6 T. At this location, magnetic needle of length 0.12 m and pole strength 1.8 Am is suspended from its mid-point using a thread, it makes 45° angle with horizontal in equilibrium. To keep this needle horizontal, the vertical force that should be applied at one of its ends is:
(a)
3.6×10−5 N
(b)
6.5×10−5 N
(c)
1.3×10−5 N
(d)
1.8×10−5 N
At some location on earth the horizontal component of earth’s magnetic field is 18×10−6 T. At this location, magnetic needle of length 0.12 m and pole strength 1.8 Am is suspended from its mid-point using a thread, it makes 45° angle with horizontal in equilibrium. To keep this needle horizontal, the vertical force that should be applied at one of its ends is:
(a)
3.6×10−5 N
(b)
6.5×10−5 N
(c)
1.3×10−5 N
(d)
1.8×10−5 N
Question ID - 50256 :-
At some location on earth the horizontal component of earth’s magnetic field is 18×10−6 T. At this location, magnetic needle of length 0.12 m and pole strength 1.8 Am is suspended from its mid-point using a thread, it makes 45° angle with horizontal in equilibrium. To keep this needle horizontal, the vertical force that should be applied at one of its ends is:
(a)
3.6×10−5 N
(b)
6.5×10−5 N
(c)
1.3×10−5 N
(d)
1.8×10−5 N
|
At some location on earth the horizontal component of earth’s magnetic field is 18×10−6 T. At this location, magnetic needle of length 0.12 m and pole strength 1.8 Am is suspended from its mid-point using a thread, it makes 45° angle with horizontal in equilibrium. To keep this needle horizontal, the vertical force that should be applied at one of its ends is: |
|||
|
(a) |
3.6×10−5 N |
(b) |
6.5×10−5 N |
|
(c) |
1.3×10−5 N |
(d) |
1.8×10−5 N |
Bsin45°=F
sin45°
BNext Question :
|
The modulation frequency of an AM radio station is 250 kHz, which is 10% of the carrier wave. If another AM station approaches you for license what broadcast frequency will you allot? |
|||
|
(a) |
2750 kHz |
(b) |
2000 kHz |
|
(c) |
2250 kHz |
(d) |
2900 kHz |
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