19 Questions
What is the primary function of a step-down transformer?
Converts high voltages into low voltages
How is the primary coil different from the secondary coil in a step-up transformer?
Primary coil has more turns and is made of thick wire
What is the primary purpose of a choke coil in a circuit?
To produce self-induced EMF
Which component restricts the flow of current and is typically used with a capacitor in a timing circuit?
Resistor
What type of circuit does a printed circuit board (PCB) usually have components inserted into?
Rectangular
What does a light-emitting diode (LED) do as a transducer?
Converts electrical energy to light
Which component is used to connect the power supply to an electronic gadget?
Line cord
What is the main function of an autotransformer?
Can be used only for small step up and down voltages
What is the primary function of a choke coil?
To induce self-EMF in circuits with changing currents
What is a key advantage of dome cameras?
They are difficult to identify which direction they are facing
Which type of camera is well-suited for long distance viewing outdoors?
Bullet camera
What is a key feature of C-mount cameras?
They have detachable lenses
How do day/night cameras function in low light?
They have extra sensitive imaging chips
What does the PTZ in 'PTZ camera' stand for?
Pan/Tilt/Zoom
What is an advantage of IP/network cameras?
They require less cabling and maintenance
Why are high definition (HD) cameras often used in high-risk establishments?
To capture clear footage for evidence
What is the key capability of varifocal cameras?
They can zoom in and out while maintaining focus
How do wireless security cameras transmit footage?
Over WiFi or cellular networks
What is the purpose of a transformer?
To change AC voltage levels
This quiz focuses on comparing primary and secondary coils, step up and step down transformers, and the differences in turns and wire thickness in the coils. Test your knowledge on how transformers convert voltages!
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