PhysicsEasyHigh School (11–12)Electricity & Magnetism › Electric Potential and CapacitanceAPA-LevelIB
Created by StemPy LabA sensitive meter is kept in a closed metal box, and a charged cloud passes near the box. Why is the field inside the box almost zero?
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← An electron starts from rest and is accelerated through 2.8 kV. What is its speed? Use e = 1.6 × 10⁻¹⁹ C and m = 9.1 × 10⁻³¹ kg. The speed of light is far larger.An isolated metal ball has a charge on each square metre of 7.4 × 10⁻⁷ C/m² and a radius of 8.5 cm. What is the potential of the ball compared with infinity? →
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