Physics Department
PHYS 1P22/92
Sakai
Homework
Outline
Calendar entry
Lab Manual
PreLab Questions
Formula Sheet
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MC:
How does current change II?
Not all devices- obey
Ohm's Law
Simple electric circuits
dc voltage versus
ac voltage
Resistors: ac current and voltage are
in phase
Energy/power in electric circuits
Ex:
burning up resistors
instantaneous
power loss
in a resistor
RMS voltage and average
power
Cost of electricity:
ontario hydro rates
Resistors connected in series and in parallel: Equivalent Resistance
Kirchhoff's voltage rule (KVR)
Kirchhoff's current rule (KCR)
MC:
Which resistors are connected
in series ?
MC:
Which resistors are connected
in parallel ?
MC:
bulbs in series versus bulbs in parallel
MC:
electrical "short"
Ex:
simple circuit reduction
Voltage
divider
Ex:
current dividers
MC:
current divider
MC:
KVR
MC:
unscrewing bulbs I
MC:
unscrewing bulbs II
Ex:
circuit reduction II
Ammeters and Voltmeters
A
galvonometer
is part of analog ammeters and voltmeters
A model
galvonometer
is characterized by "full scale deflection" and coil resistance
A real
analog ammeter
consists of a galvonometer and small shunt resistors.
A real
analog voltmeter
consists of a galvonometer and large series resistors.
An ideal
ammeter
has zero resistance and is connected in series
An ideal
voltmeter
has infinite resistance and is connected in parallel.
Capacitors in electric circuits
Charging a capacitor
: Voltage grows while current
decreases
Discharging a capacitor
: Both voltage and current
decrease
Ex:
Discharging a capacitor
MC:
What happens to the RC time constant?
Ex:
Charging a capacitor
Magnetism, induction and ac circuits
Wave Optics
Quantum Physics
1812 Sir Isaac Brock Way
St. Catharines, Ontario, L2S 3A1
Phone: +1.905.688-5550
ext.
3412
Email:
physics@brocku.ca
Fax: +1.905.984-4857
[Disclaimer]
Updated: 10-Feb-2017 10:50