1
KCET 2026
MCQ (Single Correct Answer)
+1
-0
Consider three point charges $-2Q, Q$ and $-Q$ and three surfaces $S_1, S_2$ and $S_3$ as shown in the figure. Match the entries of List-I with that of List-II.

List-IList-II
(a) Net flux through $S_1$(i) $\dfrac{-2Q}{\varepsilon_0}$
(b) Net flux through $S_2$(ii) $\dfrac{-Q}{\varepsilon_0}$
(c) Net flux through $S_3$(iii) Zero
A
a - ii, b - i, c – iii
B
a - iii, b - ii, c – i
C
a - i, b - ii, c – iii
D
a - ii, b - iii, c – i
2
KCET 2026
MCQ (Single Correct Answer)
+1
-0
What will be the total electric flux through the faces of the cube as given in the figure with side of length '$a$' if a charge Q is placed at B midpoint of an edge of the cube (see figure)?
A
$\dfrac{Q}{8\varepsilon_0}$
B
$\dfrac{Q}{3\varepsilon_0}$
C
$\dfrac{Q}{4\varepsilon_0}$
D
$\dfrac{Q}{2\varepsilon_0}$
3
KCET 2026
MCQ (Single Correct Answer)
+1
-0
An electron falls through a distance $1.5$ cm in $2.0 \times 10^4$ N/C from rest. The time taken to cover this distance in second is ____
$(e = 1.6 \times 10^{-19}\text{ C}, m_e = 9.11 \times 10^{-31}\text{ kg})$
A
$2.9 \times 10^{-9}$
B
$2.9 \times 10^{9}$
C
$4 \times 10^{-6}$
D
$4 \times 10^{6}$
4
KCET 2026
MCQ (Single Correct Answer)
+1
-0
A point charge is placed in a moving train. A passenger A sitting in the train and person B on the ground observe the fields due to this charge. Then
A
A observes both electric and magnetic fields
B
B observes both electric and magnetic fields
C
A observes only magnetic field
D
B observes only electric field