Magnetism and Electrom Questions and Answers
Magnetism and Electron Questions with Answers cover the essential principles of electromagnetism and electronic motion. These electronics MCQs are frequently asked in exams like GATE, DRDO, and ISRO. Understanding the relationship between magnetic fields and electron behavior is vital for mastering electronics and electrical engineering fundamentals. Practicing these technical questions strengthens your analytical and conceptual knowledge required for both academic success and interviews. Explore our collection of electronics programming questions and answers with detailed explanations to prepare efficiently for upcoming technical tests.
Magnetism and Electrom
Showing 10 of
33 questions
1. Permeability is the inverse equivalent of which electrical term?
- Voltage
- Current
- Resistance
- Conductance
2. Which electromagnetic device uses brushes and a commutator?
- A speaker
- A dc generator
- A relay
- A solenoid
3. What is the flux density of a magnetic field whose flux is 3000 µWb and cross-sectional area is 0.25 m2?
- 12,000 mu.gifT
- 83,330 T
- 0 T
- More information is needed in order to find flux density.
4. What are the effects of moving a closed wire loop through a magnetic field?
- A voltage is induced in the wire.
- A current is induced in the wire.
- The polarity across the wire depends on the direction of motion.
- All of the above
5. The Hall effect
- is a phenomenon with no practical applications
- is used in various sensor applications
- can develop potentials of thousands of volts
- is the basis for solar cell operation
6. "Series" and "parallel" as applied to dc motors refer to
- the connection of the motor and controller
- the connection of the field coil and armature windings
- the connection of the brush and commutator
- the connection of the motor batteries
7. The component that produces power in an electromagnetic generator is called the
- armature
- field winding
- commutator
- brush
8. What is the magnetomotive force in a 150-turn coil of wire with 2 A flowing through it?
- 13.33 mAt
- 300 At
- 75 At
- 152 At
9. A Hall effect sensor
- exists only in theory
- is a noncontacting magnetic sensor
- can operate only a few times before failure
- produces very large voltages
10. Which two values are plotted on a B-H curve graph?
- Reluctance and flux density
- Permeability and reluctance
- Magnetizing force and permeability
- Flux density and magnetizing force