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Design and Technology
What does IC stand for?
On a diode, what would be indicated by a silver band at one end?
Tolerance of 10%
A clamping diode protects a circuit due to what?
The battery being put in back to front
What does LED stand for?
What is the current required to power an LED?
Around 20 mA
Around 20 A
Around 20 MA
How many AA batteries would need to be put in series to create a 6V supply?
What is the function of a capacitor?
To limit the current in a circuit
To store charge
To act as a bistable
In a simple timer circuit with a capacitor and a resistor, what would be the effect of increasing the value of the resistor?
Increase in the time constant
Decrease in the time constant
Increase in the capacitance
How does a resistor prevent damage to components in a circuit?
By increasing the time constant of the circuit
By preventing damage due to back EMF
By restricting the flow of current
What will happen to the resistance of a thermistor as the temperature rises?
The resistance will decrease
There will be no change in resistance
The resistance will increase
What will happen to the resistance of a light-dependent resistor as the amount of light falling on it increases?
What is the unit of resistance?
Which of the following could be used to make a potential divider?
A resistor and a capacitor in series
Two resistors in parallel
Two resistors in series