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# (Solved): 140 MAGNETIC FIEL.D 20 A1. A proton moving horizontally enters in a space region with uniform magnet ...

140 MAGNETIC FIEL.D 20 A1. A proton moving horizontally enters in a space region with uniform magnetic field

`B=6**10^(-2)I`

directed vertically upside, If its motion follows on a horizontal circular orbit with radius

`26cm`

, find: a) its speed .... b) how many revolutions it achieves in

`1sec......`

. c) The electric field in this space region (direction&magnitude or vector expression)..... one should apply in this space region so that proton can follow its way without deviation. A2. A rectangular loop has 25 turns with sides

`a=2cm`

and

`c=5cm`

, as shown in figure. Assume that there is current

`0.8A`

through wire that constitute the loop and the loop is inside an uniform magnetic field with magnitude 0.3 T directed parallel to the plane of the loop as shown. Refier to the ixxes shown and find: b) the torgae vector on the loop

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