7. The length of a certain wire is doubled while its radius is kept constant. What is the new resistance of this wire? A
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7. The length of a certain wire is doubled while its radius is kept constant. What is the new resistance of this wire? A
7. The length of a certain wire is doubled while its radius is kept constant. What is the new resistance of this wire? A. It stays the same. C. It is 2 times as large. B. It is as large. 9 E. It is 4 times as large. D. It is 3 times as large. 24 + OR 3. Rank in order, from largest to smallest, the magnitudes of the electric field at the black dot. A. 3, 2, 1, 4 B. 1, 3, 2, 4 C. 3, 1, 2, 4 D. 4, 3, 2, 1 E. 4, 2, 1, 3 . A hydrogen atom consists of a proton and an electron. If the orbital distance of the electron increases, the electric potential energy of the electron A. decreases. B. increases. 10. In the circuit shown in the figure, all resistors have equal values. Which is the correct Kirchhoff junction law equation? A. 1₁ = 12 + 13. B. 13 = 11 + 12. C. 12 = 11 + 13. D. Is = 1₂ +12 + 13. C. remains the same. AV, A 29 (+) 29 + (+) 2r 2r R₂ www R3 B R1
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