Question

A moving charge produces
A. Neither electric field nor magnetic field
B. Electric – static field only.
C. Magnetic field only.
D. Both magnetic field and electro-static field.

Answer 1

Hint: to solve this type of question we need a simple property of charge which is If there is charge that means there will be an electric field and when the charge will move it will produce a magnetic field.

Complete answer:
Let’s check the definition of the electric field-
Electric field is an electric property associated with each point in the space when the charge is present in any form.
Now magnetic field-
Magnetic fields are produced by moving electric charges and the intrinsic magnetic moments of elementary practices associated with a fundamental quantum property, their spin.
Therefore, from both the definitions we can conclude that if there is charge there will be an electric field and when charge is moving it will produce a magnetic field.

Hence we can say that the potion (D) magnetic field and the electrostatic field are correct.

Additional information:
Properties of the magnetic field lines
Magnetic field lines never cross each other.
Magnetic field lines always emerge or start from the North Pole and end at the South Pole.
Magnetic field lines always make closed loops.
The density of the field lines indicates the strength of the field.
Properties of the electric field lines:-
Electric field lines never intersect.
Electric field lines always begin and positive charge and end on the negative charge.
The number of the electric field lines leaving a positive charge or entering a negative a negative charge is proportional to the magnitude of the charge.

Note:
As an approach to find the correct option we see the definition of the electric field which conclude that the option (b) is correct but then we see definition of the magnetic field so that we conclude by seeing both the definition that option (D) will be the correct answer.