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All questions of Magnetism for UPSC CSE Exam
Which of the following statements about magnetic field lines is incorrect?- a)They are closer together in regions of stronger magnetic field
- b)They do not intersect with each other
- c)They form closed loops
- d)They are farther apart in regions of weaker magnetic field
Correct answer is option 'B'. Can you explain this answer?
Which of the following statements about magnetic field lines is incorrect?
a)
They are closer together in regions of stronger magnetic field
b)
They do not intersect with each other
c)
They form closed loops
d)
They are farther apart in regions of weaker magnetic field
|
KS Coaching Center answered |
Magnetic field lines do not intersect with each other. They form continuous, closed loops.
Which of the following substances is not attracted to a magnet?- a)Iron
- b)Copper
- c)Nickel
- d)Cobalt
Correct answer is option 'C'. Can you explain this answer?
Which of the following substances is not attracted to a magnet?
a)
Iron
b)
Copper
c)
Nickel
d)
Cobalt
|
|
KS Coaching Center answered |
Copper is not a ferromagnetic material and, therefore, is not attracted to a magnet.
The device used to measure the strength and direction of a magnetic field is called:- a)Magnetoscope
- b)Magnetometer
- c)Magnetograph
- d)Magneton
Correct answer is option 'B'. Can you explain this answer?
The device used to measure the strength and direction of a magnetic field is called:
a)
Magnetoscope
b)
Magnetometer
c)
Magnetograph
d)
Magneton
|
Niharika Mishra answered |
Understanding the Magnetometer
A magnetometer is an essential scientific instrument used for measuring the strength and direction of magnetic fields. It plays a crucial role in various fields such as geology, archaeology, and physics.
Key Features of Magnetometers:
Comparison with Other Devices:
While there are other instruments related to magnetic fields, such as:
In conclusion, the magnetometer stands out as the correct answer due to its specific function of measuring both the strength and direction of magnetic fields, making it a vital tool in scientific research and various practical applications.
A magnetometer is an essential scientific instrument used for measuring the strength and direction of magnetic fields. It plays a crucial role in various fields such as geology, archaeology, and physics.
Key Features of Magnetometers:
- Measurement Capabilities: Magnetometers can detect both the intensity and orientation of magnetic fields, providing detailed insights into magnetic anomalies.
- Types of Magnetometers: There are several types, including fluxgate, proton precession, and optically pumped magnetometers, each with unique operational principles and applications.
- Applications: They are widely used in mineral exploration, environmental studies, and even in navigation systems for aircraft and ships.
- Portable Options: Many modern magnetometers are designed to be portable, allowing for fieldwork in remote areas.
Comparison with Other Devices:
While there are other instruments related to magnetic fields, such as:
- Magnetoscope: Primarily used for visualizing magnetic fields, not measuring them.
- Magnetograph: Typically used for recording the variations in magnetic fields over time, but does not measure strength directly.
- Magneton: A unit of measurement for magnetic moments, not an instrument for measuring magnetic fields.
In conclusion, the magnetometer stands out as the correct answer due to its specific function of measuring both the strength and direction of magnetic fields, making it a vital tool in scientific research and various practical applications.
Which of the following materials can be easily magnetized?- a)Steel
- b)Aluminum
- c)Copper
- d)Wood
Correct answer is option 'A'. Can you explain this answer?
Which of the following materials can be easily magnetized?
a)
Steel
b)
Aluminum
c)
Copper
d)
Wood
|
Paradigm Institute answered |
Steel is a ferromagnetic material that can be easily magnetized. Aluminum and copper are non-magnetic materials, and wood is diamagnetic.
Which property of a magnet determines its strength?- a)Length
- b)Mass
- c)Temperature
- d)Magnetic moment
Correct answer is option 'D'. Can you explain this answer?
Which property of a magnet determines its strength?
a)
Length
b)
Mass
c)
Temperature
d)
Magnetic moment
|
|
KS Coaching Center answered |
The strength of a magnet is determined by its magnetic moment, which is a property related to the alignment and arrangement of its magnetic domains.
Which of the following substances is a natural magnet?- a)Iron
- b)Copper
- c)Aluminum
- d)Steel
Correct answer is option 'A'. Can you explain this answer?
Which of the following substances is a natural magnet?
a)
Iron
b)
Copper
c)
Aluminum
d)
Steel
|
|
Paradigm Institute answered |
Iron is a natural magnet and can exhibit magnetic properties without the need for external influence.
Which type of magnet is commonly used in electric bells and speakers?- a)Bar magnet
- b)Horseshoe magnet
- c)Cylindrical magnet
- d)Ring magnet
Correct answer is option 'B'. Can you explain this answer?
Which type of magnet is commonly used in electric bells and speakers?
a)
Bar magnet
b)
Horseshoe magnet
c)
Cylindrical magnet
d)
Ring magnet
|
|
Paradigm Institute answered |
Horseshoe magnets are commonly used in electric bells and speakers due to their strong magnetic field and convenient shape.
The phenomenon of a material retaining some magnetism even after the removal of an external magnetic field is called:- a)Retentivity
- b)Demagnetization
- c)Permeability
- d)Susceptibility
Correct answer is option 'A'. Can you explain this answer?
The phenomenon of a material retaining some magnetism even after the removal of an external magnetic field is called:
a)
Retentivity
b)
Demagnetization
c)
Permeability
d)
Susceptibility
|
|
Paradigm Institute answered |
Retentivity is the property of a material to retain some magnetism even after the removal of an external magnetic field.
Which of the following factors does not affect the strength of the magnetic field produced by an electric current?- a)Length of the wire
- b)Diameter of the wire
- c)Material of the wire
- d)Current flowing through the wire
Correct answer is option 'B'. Can you explain this answer?
Which of the following factors does not affect the strength of the magnetic field produced by an electric current?
a)
Length of the wire
b)
Diameter of the wire
c)
Material of the wire
d)
Current flowing through the wire
|
Catalyst Learningacademy answered |
The diameter of the wire does not significantly affect the strength of the magnetic field produced by an electric current. Factors such as the length of the wire, the material of the wire, and the current flowing through the wire have a more significant impact.
The strength of a magnetic field is strongest:- a)Near the poles of a magnet
- b)In the middle of a magnet
- c)Far away from the magnet
- d)In a non-magnetic material
Correct answer is option 'A'. Can you explain this answer?
The strength of a magnetic field is strongest:
a)
Near the poles of a magnet
b)
In the middle of a magnet
c)
Far away from the magnet
d)
In a non-magnetic material
|
|
KS Coaching Center answered |
The strength of a magnetic field is strongest near the poles of a magnet.
The process of aligning the domains of a magnetic material to produce a magnet is called:- a)Magnetization
- b)Polarization
- c)Induction
- d)Demagnetization
Correct answer is option 'A'. Can you explain this answer?
The process of aligning the domains of a magnetic material to produce a magnet is called:
a)
Magnetization
b)
Polarization
c)
Induction
d)
Demagnetization
|
|
Catalyst Learningacademy answered |
The process of aligning the domains of a magnetic material to produce a magnet is called magnetization.
Magnetic field lines around a bar magnet:- a)Start from the South Pole and end at the North Pole
- b)Start from the North Pole and end at the South Pole
- c)Form a circular pattern around the magnet
- d)Do not exist
Correct answer is option 'C'. Can you explain this answer?
Magnetic field lines around a bar magnet:
a)
Start from the South Pole and end at the North Pole
b)
Start from the North Pole and end at the South Pole
c)
Form a circular pattern around the magnet
d)
Do not exist
|
|
Paradigm Institute answered |
Magnetic field lines around a bar magnet start from the North Pole and end at the South Pole, forming a closed loop.
The phenomenon of a temporary magnet losing its magnetism when the inducing magnetic field is removed is called:- a)Hysteresis
- b)Demagnetization
- c)Induction
- d)Retentivity
Correct answer is option 'B'. Can you explain this answer?
The phenomenon of a temporary magnet losing its magnetism when the inducing magnetic field is removed is called:
a)
Hysteresis
b)
Demagnetization
c)
Induction
d)
Retentivity
|
|
KS Coaching Center answered |
The phenomenon of a temporary magnet losing its magnetism when the inducing magnetic field is removed is called demagnetization.
The SI unit of magnetic field is:- a)Weber
- b)Tesla
- c)Gauss
- d)Ampere
Correct answer is option 'B'. Can you explain this answer?
The SI unit of magnetic field is:
a)
Weber
b)
Tesla
c)
Gauss
d)
Ampere
|
|
Catalyst Learningacademy answered |
The SI unit of magnetic field is the Tesla (T).
The magnetic field inside a solenoid is:- a)Zero
- b)Maximum
- c)Uniform
- d)Random
Correct answer is option 'C'. Can you explain this answer?
The magnetic field inside a solenoid is:
a)
Zero
b)
Maximum
c)
Uniform
d)
Random
|
|
Catalyst Learningacademy answered |
The magnetic field inside a solenoid, which is a tightly wound coil of wire, is uniform.
Which law states that the magnetic field produced by a current-carrying wire is directly proportional to the current and inversely proportional to the distance from the wire?- a)Ampere's Law
- b)Ohm's Law
- c)Faraday's Law
- d)Coulomb's Law
Correct answer is option 'A'. Can you explain this answer?
Which law states that the magnetic field produced by a current-carrying wire is directly proportional to the current and inversely proportional to the distance from the wire?
a)
Ampere's Law
b)
Ohm's Law
c)
Faraday's Law
d)
Coulomb's Law
|
|
Catalyst Learningacademy answered |
Ampere's Law states that the magnetic field produced by a current-carrying wire is directly proportional to the current and inversely proportional to the distance from the wire.
Which of the following statements about magnetic poles is true?- a)Like poles attract each other
- b)Unlike poles attract each other
- c)Like poles repel each other
- d)Unlike poles repel each other
Correct answer is option 'C'. Can you explain this answer?
Which of the following statements about magnetic poles is true?
a)
Like poles attract each other
b)
Unlike poles attract each other
c)
Like poles repel each other
d)
Unlike poles repel each other
|
|
KS Coaching Center answered |
Like magnetic poles (both North or both South) repel each other, while unlike poles (one North and one South) attract each other.
The poles of a magnet are:- a)North and South
- b)East and West
- c)Positive and Negative
- d)Up and Down
Correct answer is option 'A'. Can you explain this answer?
The poles of a magnet are:
a)
North and South
b)
East and West
c)
Positive and Negative
d)
Up and Down
|
|
Catalyst Learningacademy answered |
The poles of a magnet are referred to as the North pole (N) and the South pole (S).
A magnet will always attract:- a)Ferromagnetic materials
- b)Diamagnetic materials
- c)Paramagnetic materials
- d)All of the above
Correct answer is option 'A'. Can you explain this answer?
A magnet will always attract:
a)
Ferromagnetic materials
b)
Diamagnetic materials
c)
Paramagnetic materials
d)
All of the above
|
|
Catalyst Learningacademy answered |
A magnet will always attract ferromagnetic materials, which are strongly attracted to magnetic fields. Diamagnetic and paramagnetic materials may also be weakly attracted, but to a lesser extent.
Which of the following is an example of an electromagnet?- a)Permanent magnet
- b)Refrigerator magnet
- c)Bar magnet
- d)MRI machine
Correct answer is option 'D'. Can you explain this answer?
Which of the following is an example of an electromagnet?
a)
Permanent magnet
b)
Refrigerator magnet
c)
Bar magnet
d)
MRI machine
|
|
KS Coaching Center answered |
An MRI (Magnetic Resonance Imaging) machine utilizes electromagnets to generate strong magnetic fields for medical imaging purposes.
Chapter doubts & questions for Magnetism - Lucent For GK 2025 is part of UPSC CSE exam preparation. The chapters have been prepared according to the UPSC CSE exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for UPSC CSE 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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