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(A) When a high-energy $X-$ray beam falls on a metallic ball,photoelectrons are emitted from the surface of the ball due to the photoelectric effect.A

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will be deflected in the direction of the field

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(A) When a high-energy $X-$ray beam falls on a metallic ball,photoelectrons are emitted from the surface of the ball due to the photoelectric effect.As the ball loses electrons,it acquires a net positive charge.Since the ball is placed in a uniform electric field,a positive charge experiences an electrostatic force $F = qE$ in the direction of the electric field.Consequently,the ball will be deflected in the direction of the electric field until it reaches a new equilibrium position.

$A$ small metal ball is suspended in a uniform electric field with the help of an insulated thread. If a high-energy $X-$ray beam falls on the ball,then the ball

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