1
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

The maximum power rating of a $20 \Omega$ resistor is 2 kW . Then, it cannot be used with 300 V DC source because the

A
current drawn is very large and it can blow the fuse.
B
current drawn is very less and appliance does not work.
C
resistor may melt due to excessive heat.
D
None of the above
2
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

A metal surface is illuminated with photons of energies $E_1=4 \mathrm{eV}$ and $E_2=2.5 \mathrm{eV}$ respectively. The ratio of maximum speeds of the photoelectrons in two cases is 2 . Work function of metal surface will be

A
2.5 eV
B
5 eV
C
4 eV
D
2 eV
3
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

A germanium crystal is doped with arsenic atoms and indium atoms simultaneously. Number of arsenic atoms used $=5 \times 10^{22}$ per $\mathrm{m}^3$ and number of indium atoms used $=5 \times 10^{20}$ per $\mathrm{m}^3$, then resulting crystal is a/an

A
p-n junction
B
p-type semiconductor
C
$n$-type semiconductor
D
Depends on number of germanium atoms in given sample.
4
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

In a car lift, compressed air exerts a force $F_1$ on a small piston having a radius of 5.0 cm . This pressure is transmitted to a second piston of radius 10.0 cm . If the mass of the car to be lifted is 1350 kg . The force on a small piston is

A
1470 N
B
1480 N
C
1490 N
D
1500 N
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