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Total questions: 10
Worksheet time: 19mins
Electric field intensity is a ............
base quantity
scaler quantity
non vector quantity
vector quantity
The spacing between field lines shows their
direction
position
strength
none of above
The region around a charge q in which it exerts a force on a test charge is called
electric field intensity
electric force
electric field
coulomb's force
The field lines always emerge from
negative charge
positive charge
the central point of both charges
all of above
Two point charges, q1 and q2, are placed a distance r apart. The electric field is zero at a point P between the charges on the line segment connecting them. We conclude that:
q1 and q2 must have the same magnitude and sign P must be midway between q1 and q2
q1 and q2 must have the same sign but may have different magnitudes
q1 and q2 must have equal magnitudes and opposite signs
q1 and q2 must have opposite signs and may have different magnitudes
Charges Q, -Q, and q are placed at the vertices of an equilateral triangle as shown. The total force exerted on the charge q is:
toward charge Q.
toward charge -Q.
away from charge Q.
left
right.
In the figure, if Q = 30 µC, q = 5.0 µC, and d = 30 cm, what is the magnitude of the electrostatic force on q?
15 N
23 N
zero
7.5 N
38 N
If a = 60 cm, b = 80 cm, Q = –6.0 nC, and q = 4.0 nC, what is the magnitude of the electric field at point P?
35 N/C
42 N/C
52 N/C
64 N/C
104 N/C
Two small charged objects repel each other with a force F when separated by a distance d. If the charge on each object is reduced to one-fourth (1/4) of its original value and the distance between is reduced to d/2, the force becomes:
F/16
F/8
F/4
F/2
F
A particle (mass = 4.0 g, charge = 80 mC) moves in a region of space where the electric field is uniform and is given by Ex = –2.5 N/C, Ey = Ez = 0. If the velocity of the particle at t = 0 is given by vx = 80 m/s, vy = vz = 0, what is the speed of the particle at t = 2.0 s?
40 m/s
20 m/s
60 m/s
80 m/s
180 m/s
