- Courses
- Tutorials
- Practice
- Jobs
- Basics Concepts of Thermodynamics
- Zeroth Law of Thermodynamics
- First Law of Thermodynamics
- Second Law of Thermodynamics
- Thermodynamic Cycles
- Thermodynamic State Variables and Equation of State
- Enthalpy: Definition, Formula and Reactions
- State Functions
- Carnot Engine
- Heat Engine - Definition, Working, PV Diagram, Efficiency, Types
Magnetism
Question 1
Which of the following is true about magnetic field lines?
- A
They originate from the South Pole and terminate at the North Pole.
- B
They originate from the north pole and terminate at the south pole.
- C
They are always circular.
- D
They can never intersect each other.
Question 2
What is the unit of magnetic field strength?
- A
Ampere
- B
Tesla
- C
Weber
- D
Volt
Question 3
The force on a charged particle moving in a magnetic field depends on all of the following except :
- A
The charge of the particle
- B
The velocity of the particle
- C
The direction of the magnetic field
- D
The temperature of the particle
Question 4
Which of the following materials is not magnetic?
- A
Iron
- B
Cobalt
- C
Copper
- D
Nickel
Question 5
Which of the following statements about Earth's magnetic field is correct?
- A
The magnetic poles of the Earth coincide with the geographic poles.
- B
The magnetic field of the Earth is created by its solid iron core.
- C
The magnetic field of the Earth is produced by the motion of molten iron in its outer core.
- D
The magnetic field does not affect compass needles.
Question 6
If a current-carrying wire is placed in a magnetic field, the force acting on the wire will be:
- A
Zero if the current is parallel to the magnetic field.
- B
Zero if the current is perpendicular to the magnetic field.
- C
Maximum if the current is at an angle of 45° to the magnetic field.
- D
Zero if the wire is not carrying any current.
Question 7
Which of the following devices is based on the principle of electromagnetism?
- A
Electric fan
- B
Electric bulb
- C
Electric motor
- D
Electric heater
Question 8
In a solenoid, the magnetic field inside is:
- A
Zero
- B
Uniform and parallel to the axis
- C
Stronger at the ends of the solenoid
- D
Variable depending on the current
Question 9
The magnetic force on a moving charged particle is maximum when:
- A
The velocity and magnetic field are parallel
- B
The velocity and magnetic field are perpendicular
- C
The velocity is zero
- D
The charge is negative
Question 10
What is the direction of the magnetic field around a straight current-carrying conductor?
- A
The magnetic field lines form straight lines along the conductor.
- B
The magnetic field lines are perpendicular to the conductor
- C
The magnetic field lines form concentric circles around the conductor.
- D
The magnetic field lines are parallel to the current direction.
There are 10 questions to complete.