Quiz S Version 3 PHYS 24 1/122 /10 Summer 2018 Score: my honor, i pleige thot i

Question

Quiz S Version 3 PHYS 24 1/122 /10 Summer 2018 Score: my honor, i pleige thot i hove net violates the rvisions of the P Studtens torne the best anawer for each item below 1. A bar L-80 em) moves on two fr rails, an shown, in a magnetic field is uniform (-0.30 T) and into the paper. If v-50 cm's d nhat is the magnetic force on the moving bar A)0.32 N to the left B) 0.32 N to the right C) 0.48 N to the left D) 048 N to the right E) None of the above 2. A loop of wire (resistance- 2.0 mW ) is positioned as shown with respect to a long wire which caries a current. Ifd- 1,0 em, D 6.0 em, and L-1.5 m, what current is induced in the loop at an instant when the current in the wire is increasing at a rate of 100 A/s? A) 0.50 mA B) 30 mA C) 34 mA D) 38 mA E) 27 mA 3. A flat coil of wire consisting of 20 turns, each with an area of 50 cm2, is positioned perpendicularly to a uniform magnetic field that increases its magnitude at a constant rate from 2.0 T to 6.0 T in 2.0 s. If the coil has a total resistance of 0.402, what is the magnitude of the induced current? A) 0.70 A B) 0.60 A C) 0.20 A D) 0.50 A E) 0.80 A 4. An induced emf is produced in: in a nonuniform static magnetic field. A) closed loop of wire with constant velocity B) closed loop of wire when it remains at rest in a nonuniform static magnetic field. C) closed loop of wire when it remains at rest in a uniform static magnetic field. D) all of the above. E) only 2 and 3 above

Explanation / Answer

Emf induced, e= BLv

Induced current corresponding to emf

i= BLv/R (i)

Force needed to move the bar

F= BiL

F= B(BLv/R) L

F= B^2* L^2* v/ R

F= 0.3*0.3* 0.8*0.8* 0.5/0.06

F= 0.48 N

Directed to the left.

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According to chegg guidelines we can solve one problem at a time so plz reattach your otherproblems seperately..

Comment in case any doubt.. Goodluck

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