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A rectangular frame of 25 cm x 15 cm is placed normal to 2 xx 10^4 NC^(-1) uniform field. If this frame is formed in circular shape, then flux associated will be......Nm^(2)C^(-1).(a) 750 (b) 1019.1 (c) 800 (d) 2015.5 |
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Answer» 750 `l=2(25 + 15) = 2 XX 40` =80 cm Radius of circle of length r, `r=l/(2pi) = 80/(2 xx 3.14) = 40/pi xx 10^(-2) m` Area. `A = pir^(2) = pi xx (40 xx 10^(-2))^(2)/pi^(2) =(1600 xx 10^(-4))/pi m^(2)` `therefore` FLUX associated with circular frame, `phi =EAcostheta` `=2 xx 10^(4) xx (1600 xx 10^(-4))/pi xx cos0^(@)` `therefore 1019.1 Nm^(2)C^(-1)` |
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