1
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0

The order and degree of the differential equation $${\left[ {1 + {{\left( {{{dy} \over {dx}}} \right)}^5}} \right]^{{1 \over 3}}} = {{{d^2}y} \over {d{x^2}}}$$ are respectively

A
2, 1
B
1, 5
C
2, 3
D
2, 5
2
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0

Light of frequency 1015 Hz falls on a metal surface of work function 2.5 eV. The stopping potential of photoelectrons (in V) is

A
1.6
B
2.5
C
4.1
D
6.6
3
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0

A proton accelerated through a potential V has de-Broglie wavelength $$\lambda$$. Then, the de-Broglie wavelength of an $$\alpha$$-particle, when accelerated through the same potential V is

A
$$\frac{\lambda}{2}$$
B
$$\frac{\lambda}{\sqrt2}$$
C
$$\frac{\lambda}{2\sqrt2}$$
D
$$\frac{\lambda}{8}$$
4
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0

Consider a thin spherical shell of radius R consisting of uniform surface charge density s. The electric field at a point of distance x from its centre and outside the shell is

A
inversely proportional to $$s$$
B
directly proportional to $$x^2$$
C
directly proportional to $$R$$
D
inversely proportional to $$x^2$$
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12