WorksheetsCircuits Key Definitions/Explanations
Total questions: 13
Worksheet time: 7mins
What is current?
Q =I/t
charge
the flow of charge
the rate of flow of charge
In conventional current charge flows from the
positive terminal to negative terminal
battery to the components
negative terminal to the positive terminal
the supply to the components
What fundamental physics explains Kirchoff's 1st law?
conservation of energy
conservation of mass
conservation of charge
conservation of time
What fundamental physics explains Kirchoff's 2nd law?
conservation of energy
conservation of mass
conservation of charge
conservation of time
What should the condition be for Ohm's law?
temperature must be 0K
high pressure and temperature
the temperature must be constant
the temperature must be high
In teh reverse direction, a diode's resistance is
very low
very high
0
infinity
Which of the following components is a semiconductor?
LDR
LED
Resistor
Switch
Terminal potential difference =
lost volts
EMF - lost volts
lost volts - EMF
EMF + lost volts
resistivity has units of
ohms
ohms per metre
ohm metres
ohms per unit area
An NTC thermistor's resistance _________ with decreasing temperature
decreases
increases
changes
exponentially decreases
In a semiconductor like the NTC thermistor, what are released with increasing temperature?
electrons
protons
ions
conduction electrons
In the equation I = nvqA n stands for
number of charge carriers
charge carriers per unit area
charge carriers per unit volume
charge carriers per unit length
Drift velocities tend to be
Slow
Fast
equal to the current
equal to the speed of light
