Question 5 a) i. A piece of pencil lead is connected in series with an ammeter and a power supply. The power supply is turned on. After a few minutes, although the potential difference across the pencil lead does not change, the current in the circuit increases significantly. Explain why the current increases. ii. The current / in a length of aluminum of cross-sectional area A is given by the formula I nevA e is the charge on an electron. Show that the units on the left-hand side of the equation are consistent with those on the right-hand side.

Question 5 a) i. A piece of pencil lead is connected in series with an ammeter and a power supply. The power supply is turned on. After a few minutes, although the potential difference across the pencil lead does not change, the current in the circuit increases significantly. Explain why the current increases. ii. The current / in a length of aluminum of cross-sectional area A is given by the formula I nevA e is the charge on an electron. Show that the units on the left-hand side of the equation are consistent with those on the right-hand side.

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter12: Batteries And Other Sources Of Electricity

Section: Chapter Questions

Problem 14RQ: 14. A 6-V lead-acid battery has an A-hr rating of 180 A-hr. The battery is to be load-tested. What...

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