4.2.1. Electrical charge
A subsection of Physics, 5054, through 4. Electricity and magnetism
Listing 10 of 106 questions
Two uncharged conducting spheres, K and L, are mounted on insulating stands. State how the structure of an insulator differs from that of a conductor and give one example of an insulator. The two spheres are in contact. shows a positively-charged insulating rod held next to K. insulating stands K L On , draw the charges on K and on L. Sphere L is moved to the right, a long way from sphere K. 1. The positively charged rod is moved away. State what happens to the charge on K. 2. An earthing wire is connected to sphere L. State what happens to the charge on L.
5054_w18_qp_22
THEORY
2018
Paper 2, Variant 2
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An uncharged plastic rod is rubbed with an uncharged woollen cloth. As a result, the rod becomes negatively charged. Explain, in terms of particles, how the rod becomes charged and state what happens to the cloth. shows a metal sphere X on a plastic stand. metal sphere X plastic stand Explain why metals are electrical conductors and why plastics are electrical insulators. The negatively charged plastic rod is held above sphere X. shows that it does not touch the sphere. negative rod – – – – – – – metal sphere X By drawing on , show the distribution of charge on X. An earth wire is now connected to the metal sphere as shown in . negative rod earth wire – – – – – – – State what happens to the charges on the sphere as the earth wire is connected. The earth wire in stays connected to the metal sphere. Describe the distribution of charge on the sphere. The earth wire is disconnected from the sphere and then the negatively charged rod is moved away from the sphere. Explain what happens to the charges on the sphere as the charged rod is moved away. A second metal sphere Y is negatively charged. There is an electric field surrounding Y. State what is meant by ‘electric field’. shows the negatively charged sphere Y. The negative charges are not shown. Y On , draw the pattern and mark the direction of the electric field lines surrounding sphere Y.
5054_w22_qp_22
THEORY
2022
Paper 2, Variant 2
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Questions Discovered
106