MEDICAL PHYSICS QUIZ

What is the main function of a capacitor in an electrical circuit?

• To convert electrical energy into mechanical energy.

• To regulate the flow of current in a circuit.

• To store and release electrical energy.

• To amplify electrical signals.

How does a resistor affect the flow of current in a circuit?

• A resistor causes a short circuit in the circuit, leading to maximum current flow

• A resistor has no effect on the flow of current in a circuit

• A resistor reduces the flow of current by impeding the flow of electrons and causing a voltage drop.

• A resistor increases the flow of current by accelerating the movement of electrons

Explain the concept of electromagnetic induction.

• Electromagnetic induction is the process of generating a magnetic field from an electric current.

• Electromagnetic induction occurs when a stationary magnetic field induces an electric current in a conductor.

• Electromagnetic induction is the process where a changing magnetic field induces an electromotive force (emf) in a conductor, leading to the generation of an electric current.

• Electromagnetic induction is only applicable to solid conductors and not to liquids or gases.

What are the potential dangers of electric shock?

• Broken bones

• Skin discoloration

• The potential dangers of electric shock include burns, muscle contractions, nerve damage, and cardiac arrest.

• Headache

How do magnets interact with each other?

• Magnets have no interaction with each other

• Like poles attract, opposite poles repel

• Magnets always repel each other

• Like poles repel, opposite poles attract

Differentiate between AC and DC in terms of their flow direction.

• AC changes direction periodically, DC maintains constant direction.

• AC changes direction periodically, DC changes direction randomly.

• DC changes direction periodically, AC maintains constant direction.

• AC and DC both maintain constant direction.

What is the purpose of a rheostat in a circuit?

• To decrease the resistance in a circuit

• To amplify the signal in a circuit

• To increase the voltage in a circuit

• To control the amount of current flowing in a circuit by changing the resistance.

How can burns occur in an electrical system?

• High current flow through the body due to contact with live electrical parts or faulty wiring

• Exposure to water causing electrical shock

• Touching a grounded object while working on live wires

• Using insulated tools when working on electrical systems

What is the primary function of lasers in modern technology?

• To emit radiation for medical imaging

• To generate heat through friction

• To produce and amplify light through stimulated emission

• To create sound waves for communication

Describe the basic principles of electrotherapy in physiotherapy.

• The basic principles of electrotherapy in physiotherapy include pain modulation, muscle stimulation, tissue healing, and edema reduction.

• Electrotherapy has no impact on pain management

• Electrotherapy can only be used for muscle relaxation

• Electrotherapy does not aid in tissue healing