A charge 'q' moves in a region where electric field and magnetic field both exist, then force on it is
A charge 'q' moves in a region where electric field and magnetic field both exist, then force on it is
- q ( V × B)
- q E + q ( V × B)
- q E + q ( B × V )
- q B + q ( E × V )
The Correct Option is B
Solution and Explanation
The correct option is (B) : q E + q ( V × B)
Lorentz forece FL = Fe + Fm = q E + q( v × B)
Top Questions on Moving charges and magnetism
- A current carrying solenoid is placed vertically and a particle of mass m with charge Q is released from rest. The particle moves along the axis of solenoid. If g is acceleration due to gravity then the acceleration (a) of the charged particle will satisfy:
- JEE Main - 2026
- Physics
- Moving charges and magnetism
- For a circular coil of radius \(R\), magnetic field at the center is \(B_0 = 16~\mu\text{T}\). What will be the magnetic field on the axis at a distance \(x = \sqrt{3}R\) from the center?
- JEE Main - 2026
- Physics
- Moving charges and magnetism
- An ideal solenoid is kept with its axis vertical. Current $I_0$ is flowing in the solenoid. A charge $Q$ is thrown downward inside the solenoid. The acceleration of the charged particle is then
- JEE Main - 2026
- Physics
- Moving charges and magnetism
Three very long parallel wires carrying current as shown. Find the force acting at 15 cm length of middle wire :
- JEE Main - 2026
- Physics
- Moving charges and magnetism
- The equilateral triangular frame has current 2A. The side of frame is \(4\sqrt{3}\) cm. Magnetic field at center C is:
- JEE Main - 2026
- Physics
- Moving charges and magnetism
Questions Asked in NEET exam
In an oscillating spring mass system, a spring is connected to a box filled with sand. As the box oscillates, sand leaks slowly out of the box vertically so that the average frequency ω(t) and average amplitude A(t) of the system change with time t. Which one of the following options schematically depicts these changes correctly?
- NEET (UG) - 2025
- Waves and Oscillations
- Match List - I with List II
List I List II A. Adenosine III. Nucleoside B. Adenylic acid II. Nucleotide C. Adenine I. Nitrogen base D. Alanine IV. Amino acid - NEET (UG) - 2025
- Biochemistry
- Which of the following enzyme(s) are NOT essential for gene cloning?
A. Restriction enzymes
B. DNA ligase
C. DNA mutase
D. DNA recombinase
E. DNA polymerase- NEET (UG) - 2025
- Molecular Biology
Among the following, choose the ones with an equal number of atoms.
- 212 g of Na2CO3 (s) [molar mass = 106 g]
- 248 g of NaNO3 (s) [molar mass = 62 g]
- 240 g of NaOH (s) [molar mass = 40 g]
- 12 g of H2 (g) [molar mass = 2 g]
- 220 g of CO2 (g) [molar mass = 44 g]
Choose the correct answer from the options given below:
- NEET (UG) - 2025
- Stoichiometry and Stoichiometric Calculations
- Which one of the following enzymes contains 'Heme' as the prosthetic group?
Concepts Used:
Moving Charges and Magnetism
Moving charges generate an electric field and the rate of flow of charge is known as current. This is the basic concept in Electrostatics. Another important concept related to moving electric charges is the magnetic effect of current. Magnetism is caused by the current.
Magnetism:
- The relationship between a Moving Charge and Magnetism is that Magnetism is produced by the movement of charges.
- And Magnetism is a property that is displayed by Magnets and produced by moving charges, which results in objects being attracted or pushed away.
Magnetic Field:
Region in space around a magnet where the Magnet has its Magnetic effect is called the Magnetic field of the Magnet. Let us suppose that there is a point charge q (moving with a velocity v and, located at r at a given time t) in presence of both the electric field E (r) and the magnetic field B (r). The force on an electric charge q due to both of them can be written as,
F = q [ E (r) + v × B (r)] ≡ EElectric +Fmagnetic
This force was based on the extensive experiments of Ampere and others. It is called the Lorentz force.