1
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
$4 \times 10^{6}$
2
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
3
KCET 2026
MCQ (Single Correct Answer)
+1
-0
In the circuit shown in the figure, the potential difference across the $4 \mu\text{F}$ capacitor is
A
$3$ V
B
$4$ V
C
$9$ V
D
$12$ V
4
KCET 2026
MCQ (Single Correct Answer)
+1
-0
A parallel plate capacitor has a uniform electric field '$E$' in the space between the plates. If the distance between the plates is '$d$' and area of each plate is '$A$', the energy stored in the capacitor is
A
$\dfrac{1}{2}\varepsilon_0 E^2$
B
$\varepsilon_0 E a d$
C
$\dfrac{1}{2}\varepsilon_0 E^2 A d$
D
$\dfrac{E^2 A d}{\varepsilon_0}$