1
TG EAPCET 2024 (Online) 10th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
A $10 \mu \mathrm{~F}$ capacitor is charged by a 100 V battery. It is disconnected from the battery and is connected to another uncharged capacitor of capacitance $30 \mu \mathrm{~F}$. During this process, the electrostatic energy lost by the first capacitor is
A
$5 \times 10^{-2} \mathrm{~J}$
B
$125 \times 10^{-2} \mathrm{~J}$
C
$2.75 \times 10^{-2} \mathrm{~J}$
D
$375 \times 10^{-2} \mathrm{~J}$
2
TG EAPCET 2024 (Online) 10th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A conductor of length 1.5 m and area of cross-section $3 \times 10^{-5} \mathrm{~m}^2$ has electrical resistance of $15 \Omega$.

The current density in the conductor for an electric field of $21 \mathrm{Vm}^{-1}$ is

A
$0.7 \times 10^6 \mathrm{Am}^{-2}$
B
$0.7 \times 10^{-6} \mathrm{Am}^{-2}$
C
$0.7 \times 10^{-5} \mathrm{Am}^{-2}$
D
$0.7 \times 10^5 \mathrm{Am}^{-2}$
3
TG EAPCET 2024 (Online) 10th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
The relation between the current $i$ (in ampere) in a conductor and the time $t$ (in second) is $i=12 t+9 t^2$. The charge passing through the conductor between the times $t=2 \mathrm{~s}$ and $t=10 \mathrm{~s}$ is
A
3720 C
B
3648 C
C
3600 C
D
3552 C
4
TG EAPCET 2024 (Online) 10th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
A long straight rod of diameter 4 mm carries a steady current $i$. The current is uniformly distributed across its cross-section. The ratio of the magnetic fields at distances 1 mm and 4 mm from the axis of the rod is
A
$1: 2$
B
$1: 4$
C
$4: 1$
D
$1: 1$
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