Coulombs Law
Problem #1 :
Find the force of attraction in Newtons between the
charges Q1 and Q2 in
figure below when
a. r = 1 m
b. r = 3 m
c. r = 10 m
Solution:
Apply Coulomb's Law.
a.
The force of attraction is 0.018 N.
b.
The force of attraction is 0.00
Current And Voltage
Problem #1:
If 465 C of charge pass throught a wire in 2.5 min,
find the current in amperes.
Solution:
The current is 3.1 A.
Problem #2:
How many coulombs of charge pass through a lamp
in 2 min if the current is constant at 750 mA.
Sol
Resistance
Problem #5:
Find the resistance of a silver wire 50 yd long and
0.0045 in. in diameter.
(T = 20oC, silver= 9.9 CM/ft).
Solution:
The resistance is 73.33 .
Problem #7: A 2.2- resistor is to be made of nichrome wire. If the
available wire is 1/32
Motion in One Dimension
Problem #1:
A person travels by car from one city to another
with different constant speeds between pairs of cities. She drives
for 30.0 min at 80.0 km/h, 12.0 min at 100 km/h, and 45.0 min at
40.0 km/h and spends 15.0 min eating l
Motion in One Dimension
Problem #1:
A person travels by car from one city to another
with different constant speeds between pairs of cities. She drives
for 30.0 min at 80.0 km/h, 12.0 min at 100 km/h, and 45.0 min at
40.0 km/h and spends 15.0 min eating l