1
LAKSHYA JEE (2024)
Electric Charges and Field
1.
A charge q is placed at the centre of the line joining
two equal charges Q. The system of the three charges
will be in equilibrium, if q is equal to
Q
Q
(1) −
(2) −
2
4
Q
Q
(3) +
(4) +
4
2
2.
The electric charge in uniform motion produces
(1) An electric field only
(2) A magnetic field only
(3) Both electric and magnetic field
(4) Neither electric nor magnetic field
3.
Infinite charges of magnitude q each are lying at
x = 1,2,4,8.. metre on X-axis. The value of intensity
of electric field at point x = 0 due to these charges will
be
(1) 12  109 q NC–1
(2) Zero
(3) 6  109 q NC–1
(4) 4  109 q NC–1
4.
5.
1 q
40 r 2
(3) Zero
(2)
1 q
40 r
(4)
1 3q
40 r 2
The magnitude of electric field intensity E is such
that, an electron placed in it would experience an
electrical force equal to its weight is given by
mg
(1) mge
(2)
e
(3)
e
mg
(4)
e2
g
m2
6.
An electron and a proton are in a uniform electric
field, the ratio of their accelerations will be
(1) Zero
(2) Unity
(3) The ratio of the masses of proton and electron
(4) The ratio of the masses of electron and proton
7.
Dimensions of ε0 are
(1) M–1 L–3 T4A2
(2) M0 L–3 T3A3
(3) M–1 L–3 T3A
(4) M–1 L–3 T A2
8.
Consider two point charges of equal magnitude and
opposite sign separated by a certain distance. The
neutral point due to them
(1) Does not exist
(2) Will be in mid way between them
(3) Lies on the perpendicular bisector of the line
joining the two
(4) Will be closer to the negative charge
9.
The acceleration of an electron in an electric field of
magnitude 50 V/cm, if e/m value of the electron is
1.76 × 1011 C/kg, is
(1) 8.8 × 1014 m/sec²
(2) 6.2 × 1013 m/sec²
(3) 5.4 × 1012 m/sec²
(4) zero
ABC is an equilateral triangle. Charges +q are placed
at each corner. The electric intensity at O will be
(1)
DPP-06
2
10.
Two small spherical balls each carrying a charge
Q = 10µC (10 micro-coulomb) are suspended by two
insulating threads of equal lengths 1m each, from a
point fixed in the ceiling. It is found that in
equilibrium threads are separated by an angle 60°
between them, as shown in the figure. What is the
tension in the threads
(Given:
1
( 40 )
2
= 9 109 Nm/C )
(1) 18 N
(2) 1.8 N
(3) 0.18 N
(4) None of the above
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Note: Kindly find the Video Solution of DPPs Questions in the DPPs Section.
Answer Key
1.
(2)
6.
(3)
2.
(3)
7.
(1)
3.
(1)
8.
(1)
4.
(3)
9.
(1)
5.
(2)
10.
(2)
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