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

Two point charges of $+3 \mu \mathrm{C}$ and $-3 \mu \mathrm{C}$ are placed at a certain distance apart from each other. Electric potential at a distance 60 cm from the mid-point of dipole on axial line is 150 V , then the value of dipole length is

A
$2 \times 10^{-3} \mathrm{~m}$
B
$2 \times 10^{-4} \mathrm{~m}$
C
$10^{-3} \mathrm{~m}$
D
$10^{-4} \mathrm{~m}$
2
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

The primary of a transformer has 400 turns while the secondary has 2000 turns. If the power output from the secondary at 1000 V is 12 kW . The resistance of the primary is $0.2 \Omega$ and that of the secondary is $2 \Omega$. If the efficiency of the transformer is $80 \%$, then the power loss in the primary is

A
288 W
B
1125 W
C
2000 W
D
725 W
3
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
4
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
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