Ohm's Law

Ohm's law is a relationship between

• current, power, and energy
• voltage, capacitance, and frequency
• current, voltage, and resistance
• resistance, inductance, and temperature

Ohm's Law

• O=hl

• B=IP

• V = IR

• L=Hl

(a)   is the energy difference per charge across any two points in a circuit and is measured in (b)   (V). (c)   is the flow rate of charge and is measured in (d)   (A). (e)   reduces the current in a circuit and is measured in ohms (Ω).

• Voltage
• volts
• Current
• amps
• Resistance
• Power, watts
• Capacitance, farads
• Inductance, henries

Example: A series DC circuit with a total resistance of 300 Ω is powered by a 9 V battery. What current flows from the battery?

Givens:

V = 9 V

R = 300 Ω

I = ?

• 0.01 A
• 0.03 A
• 0.15 A
• 0.09 A

Ohm's law applies to an ​ (a)   circuit, and also to each ​ (b)   of the circuit. Always use the values of voltage, current, and resistance from the same part of the ​ (c)   when using Ohm's law.

• entire
• branch
• circuit
• partial, section, system
• complete, node, network
• single, segment, layout

Example: A 12 V battery is connected across the circuit shown. The resistance of bulb A is 200 Ω. When the switch is closed, the current through bulb A is 0.04 A. What is the voltage drop across bulb A? So I'm assuming that resistance is still 200 but now we have a current A of .04. What the new voltage which is same as meaning as voltage drop?

• 6

• 8

• 10

• 12

what is the resistance of a lightbulb that experiences 9 volts and 3amps of current?

• 1/3 ohms

• 3 ohms

• 27ohms

• 9ohms

How much current would flow through a circuit with 25 ohms of resistance and 100 volt battery?

• 4 A

• 34 A

• 3/4 A

• 3.4 A

There are 4 amps of current flowing through a circuit with 2 ohms of resistance. How much voltage did the battery provide?

• 8 V

• 2 V

• 6 V

• 18 V

What unit is used to measure current?

• Ohms

• Omega

• Volts

• Amps