8) 8) A wire, 0.60 m in length, is carrying a current of 2.0 A and is placed at

Question

8) 8) A wire, 0.60 m in length, is carrying a current of 2.0 A and is placed at a certain angle with respect to the magnetic field of strength 0.30 T. If the wire experiences a force of 0.18 N, what angle does the wire make with respect to the magnetic field? A) 60° B) 20 C 35° D) 30° E) 25 9) In an RL series circuit connected to a dc source and a switch, the inductor gets 40% of its maximum current 1.8 s after the switch is closed at t = 0 s. What is the time constant of this circuit? A) 2.5 s B) 1.5 s C) 0.80 s D) 5.5 s E) 3.5 s FIGURE 22-4 10) When the switch is closed in the circuit shown in the sketch in Figure 22-4, the wire between the 10) poles of the horseshoe magnet deflects upward. From this you can conclude that the left end of the magnet is A) a magnetic monopole. B) not contributing to the wire's deflection C) a north magnetic pole D) a south magnetic pole E) a magnetic dipole

Explanation / Answer

here,

8)

length of wire , L = 0.6 m

current , I = 2 A

magnetic feild , B = 0.3 T

force , F = 0.18 N

let the angle between the wire and magnetic feild be theta

F = I * B * L * sin(theta)

0.18 = 2 * 0.3 * 0.6 * sin(theta)

solving for theta

theta = 30 degree

the angle between the wire and magnetic feild is D) 30 degree

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