Question: A large parallel-plate capacitor with uniform surface charge a on the upper plate and ?? on the lower is moving with a constant speed

A large parallel-plate capacitor with uniform surface charge a on the upper plate and ?? σ on the lower is moving with a constant speed v, as shown in Fig. 5.43.

(a) Find the magnetic field between the plates and also above and below them.

(b) Find the magnetic force per unit area on the upper plate, including its direction.

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