Answer to Question #112853 in Electricity and Magnetism for mimi

Question #112853
find gradient of scalar fields

W = 2p (z^2 + 1) cos Φ
1
Expert's answer
2020-04-30T10:41:29-0400
W=(2ρ(z2+1)cosϕ)\nabla W=\nabla (2\rho (z^2 + 1) \cos \phi)

W=2(z2+1)cosϕeρ+4ρzcosϕez(ρ1)2ρ(z2+1)sinϕeϕ\nabla W=2 (z^2 + 1) \cos \phi e_{\rho}+4\rho z\cos \phi e_{z}\\-\left(\rho^{-1}\right)2\rho (z^2 + 1) \sin \phi e_{\phi}

W=2(z2+1)cosϕeρ+4ρzcosϕez2(z2+1)sinϕeϕ\nabla W=2 (z^2 + 1) \cos \phi e_{\rho}+4\rho z\cos \phi e_{z}\\-2 (z^2 + 1) \sin \phi e_{\phi}


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