Quiz - TSC 4061a2

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pop quiz - electricity

voltage, current and resistance Ohm's law (V = RI)Quiz 2

Resistance

Resting rate

Ohms

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In this formula, what does the letter "R" represents?

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In the formulaV = R IV = voltage in voltR = resistance in ohmI = current intensity in ampere

In series

In parallel

To be connected without the power source

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This symbol represents a machine.How is this machine connected?

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The machine is called "voltmeter".It measures voltage in volt.It has to be connected in parallel, BEFORE and AFTER (battery in this example)

Resistance of a resistor

Voltage of a battery

Current from a battery

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That value is...?

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Voltage is from a battery and its unit is volt (v)Resistance is from a resistor and its unit is ohms ( )Current's unit is ampere (A)Charges' unit is coulomb (c)

Voltages goes up while current goes down

Inversely proportional

Directly proportional

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Assuming resistance remain constant,describe how voltage affects current.

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When resistance is the same,Voltage and current goes up and down together.ie. voltage goes up and current also goes up.It's also called "directly proportional"

2A

1.67A

0.6 A

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In a circuit with 3v and 5 ohms.Use the formula to calculate the current intensity.

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summary

Unit is volt (v)Measured by voltneter connected in parallel (like a spider).

SUMMARY

VOLTAGE (V)

CURRENT (I)

RESISTANCE (R)

OHM'S LAW

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Unit is ampere (A)Measured by ammeter connected in series (right in the wire)

Let you calculate voltage, current, or resistance.

Unit is ohm( )

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