Physics 133
Problem Set #6
Problem#1Inthecircuitshown,whatcurrentdoestheammeterread?Completeexplanation required.
Problem#2WhatisthecurrentthroughresistorR inthiscircuit?Whatisthepowerofresistor R1?Wh
Physics 133
Problem Set #6
Problem#1 In the circuit shown, what current does the ammeter read? Complete explanation
required.
Problem#2 What is the current through resistor R1 in this circuit? W
Chapter 24
3. (a) The change in energy of the transferred charge is
U = q V = (30 C)(1.0 109 V) = 3.0 1010 J.
2
(b) If all this energy is used to accelerate a 1000-kg car from rest, then U =K = 1 mv ,
Chapter 25
3. THINK The capacitance of a parallel-plate capacitor is given by C = 0A/d, where A is
the area of each plate and d is the plate separation.
EXPRESS Since the plates are circular, the plat
Chapter 26
2. Suppose the charge on the sphere increases by q in time t. Then, in that time its
potential increases by
q
V =
,
4pe 0 r
where r is the radius of the sphere. This means q =4pe 0 r V . No