Reading Quiz • A light bulb is connected to a battery so that current flows through the bulb, which gives off light. Choose the correct statement: • The amount of current going into the bulb equals the current leaving the bulb. • The amount of current entering the bulb is greater than the amount of current leaving the bulb. • The bulb is converting electric charge into light.
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Reading Quiz A light bulb is connected to a battery so that current flows through the bulb, which gives off light. Choose the correct statement: The amount.
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Reading Quiz
• A light bulb is connected to a battery so that current flows through the bulb, which gives off light. Choose the correct statement:
• The amount of current going into the bulb equals the current leaving the bulb.
• The amount of current entering the bulb is greater than the amount of current leaving the bulb.
• The bulb is converting electric charge into light.
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Chapters 10,11,12,13,14,15
Summary of electric circuits:
1. The amount of current is the same at every place in a series circuit; I=q/t.
2. The power provided by the battery (P=IV) is exactly equal to the power dissipated in the resistors (P=I2R).
3. Ohm’s Law applies to resistors: V=IR
4. Series circuit: effective R = R1 + R2 + R3
5. Parallel circuit: effective R is
€
1Reff
=1R1
+1R2
+1R3
Fig. 13.3
Fig. 13.1
Fig. 13.2
Fig. 13.4
Summary 2
Ohm’s Law applies to resistors: V=IR
REMF
volts
Battery increases energy of charges (PE); voltage on battery is called “EMF”.
This amount of energy is expended in the resistor.
For a given battery (V) and resistor (R), the current is given by Ohm’s Law:
V=IR
The unit of resistance is an Ohm.
I
V
Fig. 13.6
Fig. 13.7
Fig. 13.5
Lecture Quiz 26 - Question 1:
A simple battery does which of the following:
A. It creates charges.
B. It does work on charges.
C. It creates energy.
EMF
volts
VR1
R2
R3
Series ResistanceEMF= V1 + V2 + V3
OR
V = IR1 + IR2 + IR3
= I(R1 + R2 + R3)
= I Rseries
Where Rseries = R1 + R2 + R3
Is the voltage drop the same across all three resistors?
Is the current the same through all three resistors?