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The vectors field are specified as:
F = −12ax +5ay −10az
and G = 6ax +5ay −2az
Determine:
(a) The unit vector in the direction of −F + 3G
(b) The magnitude of 5ax + G − 2F
(c) |2F| |3G| (F+ G)
(d) The cross product between F and G
The vectors field are specified as:
F = −12ax +5ay −10az
and G = 6ax +5ay −2az
Determine:
(a) The unit vector in the direction of −F + 3G
(b) The magnitude of 5ax + G − 2F
(c) |2F| |3G| (F+ G)
(d) The cross product between F and G
A multilayer coil of 2000 turns of fine wire is 20 mm long and has a thickness 5 mm of winding. If the coil carries a current of 5 mA, the mmf generated is (a) 10 A . t (c) 2000 A .t (b) 500 A . t (d) None of the above Answers
Which of these formulas is wrong? (a) B1n = B2n (b) B2 = "B2n 2 1 B2t 2 (c) H1 = H1n + H1t (d) an21 * (H1 - H2 )= K, where an21 is a unit vector normal to the interface and directed from region 2 to region 1.
Identify the statement that is not true of ferromagnetic materials. (a) They have a large xm. (b) They have a fixed value of mr. (c) Energy loss is proportional to the area of the hysteresis loop. (d) They lose their nonlinearity property above the curie temperature.
Which of these materials requires the lowest value of magnetic field strength to magnetize it? (a) Nickel (c) Tungsten (b) Silver (d) Sodium chloride
What is the unit of magnetic charge? (a) Ampere-meter squared (c) Ampere (b) Coulomb (d) Ampere-meter
The resultant force on the circular loop in Figure 8.33 has the magnitude of (a) 2proIB (c) 2roIB (b) pro 2 IB (d) Zero
Two thin parallel wires carry currents along the same direction. The force experienced by one due to the other is (a) Parallel to the lines (b) Perpendicular to the lines and attractive (c) Perpendicular to the lines and repulsive (d) Zero
Two thin parallel wires carry currents along the same direction. The force experienced by one due to the other is (a) Parallel to the lines (b) Perpendicular to the lines and attractive (c) Perpendicular to the lines and repulsive (d) Zero
#340153 on Dec 2023