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S2 Electricity

current voltage and resistance in series and parallel circuits

QuestionAnswer
What is used to measure current in a circuit? Ammeter
What happens when "opposite" charges are brought close together? They attract
What is used to measure voltage in a circuit? Voltmeter
What is the name for the type of circuit that has no branches? A series circuit
What type of charges can move? Negative charges (electrons)
What is the name for the type of circuit that has branches? Parallel circuit
What happens when "like" charges are brought close together? They repel
What is the unit for current? Amperes (Amps)
If you increase the number of batteries in a series circuit what happens to the brightness of the bulbs? Increases
If you increase the number of batteries in a parallel circuit what happens to the brightness of the bulbs? Increases
What are the units of Voltage Volts
When measuring the voltage of a component in a circuit, is the voltmeter attached in series with the component or in parallel to it? Parallel
What always stays constant at any point in a series circuit? The current
What is the unit for resistance? Ohms
What always stays constant at any point in a parallel circuit? The voltage
When measuring the current passing through a component in a circuit, is the voltmeter attached in series with the component or in parallel to it? wrong you use an ammeter in series with the components
Is the voltage in a parallel circuit always the same as the voltage of the battery? Yes
When measuring the current passing through a component in a circuit, is the ammeter attached in series with the component or in parallel to it? Series
What is the symbol for resistance? R
What is shared out in a parallel circuit? The current
What is shared in a series circuit? The supply voltage
In a series circuit if R1=100 ohms and R2=50 ohms, then the total resistance is? 150 ohms
What is the symbol for voltage? V
What is the rule for resistance in parallel circuits when R1 and R2 have the same value? Rt= half of R1
What is the rule for the value of Rt in a parallel circuit when R1 and R2 have different values? Rt is always slightly LOWER than the smaller of the 2 resistances.
What is the formula for Ohms law? V=IR
What is the symbol for current? I
Is the voltage in a series circuit always the same as the voltage of the battery? No, voltage is shared out between the components.
In a parallel circuit, if R1 is 100 ohms and R2 is 100 ohmns, what is Rt? 50 ohms
Created by: nscobie
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