1.

A uniform magnetic field is restricted with a region of radius r. The magnetic field change with time at a rate vec(dB/dt). Loop 1 of radius Rgtr encloses the region r and loop 2 of radius R is outside the region of magnetic field as shown in the figure below. then the e.m.f. genrated is ]

Answer»

`-(VEC(dB))/(DT)PIR^(2)` in LOOP `1` and zero in loop `2`
`-(vec(dB))/(dt)pir^(2)` in loop `1` and zero in loop `2`
zero in loop `1` and zero in loop `2`
`-(vec(dB))/(dt)piR^(2)` in loop `1` and `(vec(dB))/(dt0pir^(2))` in loop `2`

Solution :For loop `1`
`e_("ind")=-A((dvecB)/(dt))cos0^(@)=-pir^(2)((dvecB)/(dt))`
for loop `2,e_("ind")=0` has no FLUX linkage


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