Electricity And Magnetism

Q: The magnitude of induced emf depends upon the:

(a) :  Rate of decrease of magnetic field
(b) :  Rate of change of magnetic field
(c) :  Rate of increase of magnetic field
(d) :  Constancy of magnetic field
(e) :  None of the Above
Answer:  Rate of change of magnetic field
Explanation:  

Q: If current carrying conductor is placed prependicular to the magnetic field, it will experience a force:

(a) :  Zero
(b) :  1 LB cos a
(c) :  1 LB
(d) :  Both (a) and (b)
(e) :  None of the Above
Answer:  1 LB
Explanation:  

Q: Magnetic lines of force:

(a) :  Cannot intersect at all
(b) :  Intersect at infinitly
(c) :  Intersect within magnet
(d) :  Intersect at neutral points
(e) :  None of the Above
Answer:  Cannot intersect at all
Explanation:  

Q: If a copper rod carries a direct current, the megnetic field association with the current will be:

(a) :  Only inside the rod
(b) :  Only outside the rod
(c) :  Both inside and outside the rod
(d) :  Neither inside nor outside the rod
(e) :  None of the Above
Answer:  Both inside and outside the rod
Explanation:  

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