1
AP EAPCET 2024 - 23th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
Two particles of charges 4 nC and $Q$ are kept in air with a separation of 10 cm between them. If the electrostatic potential energy of the system is $1.8 \mu \mathrm{~J}$, then $Q=$
A
12 nC
B
9 nC
C
5 nc
D
7 nC
2
AP EAPCET 2024 - 22th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The magnitude of an electric field which can just suspend a deuteron of mass $3.2 \times 10^{-27} \mathrm{~kg}$ freely in ari is

A
$19.6 \times 10^{-8} \mathrm{NC}^{-1}$
B
$196 \mathrm{NC}^{-1}$
C
$1.96 \times 10^{-10} \mathrm{NC}^{-1}$
D
$0.196 \mathrm{NC}^{-1}$
3
AP EAPCET 2024 - 22th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
Two charges 5 nC and -2 nC are placed at points $( 5 cm\mathrm{~}$ $0,0)$ and $(23 \mathrm{~cm}, 0,0)$ in a region of space where there is no other external field. The electrostatic potential energy of this charge system is
A
$10 \times 10^{-7} \mathrm{~J}$
B
$5 \times 10^{-7} \mathrm{~J}$
C
$15 \times 10^{-7} \mathrm{~J}$
D
$25 \times 10^{-7} \mathrm{~J}$
4
AP EAPCET 2024 - 22th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
A neutral ammonia $\mathrm{NH}_3$ in its vapour state has electric dipole moment of magnitude $5 \times 10^{-30} \mathrm{C}-\mathrm{m}$. How far apart are the molecules centres of positive and negative charge?
A
$4.125 \times 10^{-12} \mathrm{~m}$
B
$3.125 \times 10^{-12} \mathrm{~m}$
C
$3125 \times 10^{-6} \mathrm{~m}$
D
$4.125 \times 10^{-6} \mathrm{~m}$
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