Electronics Quiz

Which of the following is NOT a type of common oscillator circuit mentioned in the learning material?

• Crystal

• Wien bridge

• VCO

• Flip-flop

What is one of the modes of operation for a 555 timer circuit as per the learning material?

• Astable

• Bistable

• Tri-state

• Inverter

What is the purpose of the 555 timer circuit mentioned in the learning material?

• Amplifying signals

• Deriving a sawtooth output

• Converting AC to DC

• Filtering noise

What components are used to construct a tuned LC oscillator?

• Voltage source, resistor, inductor

• Voltage source, capacitor, inductor

• Voltage source, capacitor, transformer

• Voltage source, diode, inductor

What happens when an inductor and a capacitor are connected in parallel to an AC supply at resonance?

• Energy is only stored in the inductor.

• Energy is only stored in the capacitor.

• Energy is transferred back and forth between them.

• No energy is transferred between them.

What analogy is used in the image to describe the energy transfer between the inductor and capacitor?

• Water flowing in a pipe.

• Water in a fish tank.

• Air in a balloon.

• Steam in a pressure cooker.

What occurs when a fully charged capacitor connected in parallel with an inductor starts to discharge?

• The inductor starts to give energy to the capacitor.

• The capacitor starts to give energy to the inductor, and a magnetic field builds up around the inductor.

• The capacitor fully discharges immediately.

• The magnetic field around the inductor collapses instantly.

What is the voltage across the capacitor when it is fully discharged?

• It remains at the initial charge voltage.

• It is at half the initial charge voltage.

• It is unpredictable.

• It will be nearly zero.

What happens when the capacitor is fully discharged in an LC circuit?

• The current stops flowing.

• The magnetic field around the inductor gives energy back into the circuit.

• The capacitor immediately recharges to its original charge.

• The inductor's magnetic field reaches its maximum strength.

What starts to happen to the capacitor after it is fully discharged?

• It starts charging with a voltage of the same polarity to its original charge.

• It remains fully discharged.

• It starts charging with a voltage of opposite polarity to its original charge.

• It starts to dissipate heat.