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What is the symbol for a switch
What is the symbol for a key
What is the symbol for a cell
What is the symbol for a battery
What is the symbol for a diode
What is the symbol for a resistor
what is the symbol for a variable resistor
What is the symbol for an LED
what is the symbol for a lamp
what is the symbol for a fuse
Wheat is the symbol for a voltmeter
What is the symbol for a thermistor
what is the symbol for an ammeter
what is the symbol for an LDR
Current flowing through a component in a circuit is measured in
Amperes (A) using an ammeter connected in a series with a component
The current through a component depends on
It's resistance
The greater the resistance the ...... The current per a given p.d. Across the component
Lower
Adding extra bulbs in series add
Extra resistance this decreases the current
The p.d. Across a component is measured in
Volts (V) using a voltmeter
The p.d. Provided by cells connected in a series is the
Sum of the p.d. Of each cell (depending on the direction in which they are connected)
The resistance of a component can be found by measuring the
Current through and the potential difference across the component for formula is I = V/R
V represents the
Potential difference and th unit is volts (V)
I represents the
Current and the unit is amperes (A)
R represents
Resistance and the units are ohms
If the resistance is 5 and the current is 10 what is p.d.
I = V/R
5 = V/10
5 * 10 = V
50 V = V
if the resistance is 25 and the p.d. is 100 what is the current
I = V/R
I = 100/25
I = 4 A
if the current is 1.5 and the p.d. is 3 what is the resistance
I = V/R
1.5 = 3/R
1.5R = 3
R = 3/1.5
R = 2 ohms
the p.d. across a compnent in a circuit is measured in
volts (V) using a voltmeter connected across the component
ammeters are always connected in
series even in a parallel circuit
voltmeters are always connected in
parallel with a compenent even in a series circuit
the p.d. provided by cells connected in a series is
the sum of the p.d. of each cell (depending on the direction in which they are connected)
Author
ghoran
ID
172791
Card Set
GCSE Physics
Description
Revision
Updated
2012-09-24T05:15:59Z
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