Question 1:
easyFind out correct relation between electric field intensity EA & EB present at two points in an electric field shown in the figure.
Distance between electric field lines represents magnitude of electric field lines. Large is the separation between electric field line lesser is electric field. so ,
\[ E_{A}< E_{B}\]
Question 2:
easyWhich of the following configurations of electric lines of force is not possible ?
Option 2 is wrong because electric field lines emerge out of +ve charge and submerge into -ve charge.
In option 3 number of electric field lines is proportional to amount of charge. From +5C charge 6 field lines are emerging out where as from 1C charge only one electric field line is present.
Question 3:
easyAssertion (A): If a charge is released from rest in an electric field, it will always move along an electric field line.
Reason (R): Force on a charged particle is always in the direction of electric field.
Assertion (A) is false; a particle released from rest follows a field line only if it is straight. If the field line is curved, inertia causes deviation. Reason (R) is false; for a negative charge, the force \(\vec{F} = q\vec{E}\) is opposite to the electric field \(\vec{E}\). Thus, both A and R are false.
Question 4:
easyAssertion (A): A charged particle is free to move in an electric field. It may or may not move along an electric line of force.
Reason (R): Initial conditions affect the motion of charged particle.
Assertion (A) is true; a charged particle's path in an electric field depends on its initial velocity and the field's curvature. Reason (R) is also true, as the initial velocity and position are crucial 'initial conditions' determining the trajectory. Reason (R) directly explains why the particle's path may or may not follow a field line.