5. The left diagram shows a positively charged particle is moving with velocity

Question

5. The left diagram shows a positively charged particle is moving with velocity v ina magnetic field B. Using the right diagram, the direction of the magnetic force on the B. B) 2 C)3 D) 4 E) 5 6. You place a coil that has 200 turns and a cross-sectional area of 0.050 m2 so that its plane is normal to a field of 1.0 T. If the field is uniformly decreased to zero in 5.0s, what EMF is induced in the coil? A) 0.15 kV B 0.12 kV C) 2.0 V ?D) 50mV E) 6.0 v 7. Two long parallel wires are a distance d apart and carry equal and opposite currents. Point P is distance d from each of the wires. Which diagram best represents the direction of the magnetic field at point P? A) 1 C) 3 D) 4 E) 5

Explanation / Answer

5.

Magnetic force is given by:

F = q*VxB

V = in north direction = +j

B = out of the page = +k

direction of force = VxB = jxk = i = towards east(in 1).

Correct option is A.

6.

Induced EMF is given by:

EMF = -N*d(phi)/dt

phi = magnetic flux = B*A

EMF = -N*A*dB/dt

Using given values:

EMF = -200*0.05*(0 - 1)/5

EMF = 2 V

Correct option is C.

Please Upvote.

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