An dertroa moves through with a corwtant magnetic field B the work done on the e

Question

An dertroa moves through with a corwtant magnetic field B the work done on the electron by the magnetic field A.is positive. it equal to zero. it negaiite can't be calculated without more information. Can an electron at rest in a magnetic field be set into motion by the magnetic field' (b) (an an electron at rest in an clcctnc field be vet into motion by the electric field? (a) yes (b) ye* (a) yet (b) no (a) no (b) no (a) no (b) yet What iv the direction of the magnetic force on the moving charged panicle in each of the three cases The figure shows a uniform magnetic fickl B directed to the left and a wire carrying a current into the page The magnetic force acting on the wire is: toward the top of the page toward the bottom of the page toward the left toward the right zero

Explanation / Answer

here,

Ques 5:
Work done will be postive since due to field there will magnatic force.

Ques 6.
Ans will "NO" since velocity = 0, from lortez equation, magnatic force,
F = q*B*v

Yes due to same charges of electrons in eletrci firlef there will be an electric force act on charges, which is given by expression,
F = K*q*Q/r^2

Ques 7:
From right Hand Rule,

Plam : Will give the direction of magnatic force
Thumb : dirtection of velocity
Fingure : in field Direction

Case 1: downwards
Case 2: to left
Case 3: into the page

Ques 8:

Again from right hand rule,

Thnumb = Force direction
First fingure = direction of ciurrent
middle fingure = direction fo field

Therefore, Towards upwards or to top of the page

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