1
AP EAPCET 2024 - 21th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
Two figures are shown as Fig. $A$ and Fig. $B$. The time constant of Fig. $A$ is $\tau_A$ and time constant of Fig. $B$ is $\tau_B$. Then AP EAPCET 2024 - 21th May Morning Shift Physics - Capacitor Question 1 English
A
$\tau_A=\frac{1}{4} \mathrm{~s}$ and $\tau_B=5 \mathrm{~s}$
B
$\tau_A=\frac{1}{2} \mathrm{~s}$ and $\tau_B=\frac{1}{5} \mathrm{~s}$
C
$\tau_A=4 \mathrm{~s}$ and $\tau_B=5 \mathrm{~s}$
D
$\tau_A=\frac{1}{3} \mathrm{~s}$ and $\tau_B=10 \mathrm{~s}$
2
AP EAPCET 2024 - 21th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
Which of the following produces electromagnetic waves?
A
Stationary charges
B
Charges in uniform motion
C
Accelerating charges
D
Stationary magnet
3
AP EAPCET 2024 - 21th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
A blue lamp emits light of mean wavelength $4500$ Å. The lamp is rated at 150 W and $8 \%$ efficiency. Then, the number of photons are emitted by the lamp per second
A
$27.17 \times 10^{18}$
B
$17.17 \times 10^{18}$
C
$27.17 \times 10^{15}$
D
$54 \times 10^{16}$
4
AP EAPCET 2024 - 21th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
The ground state energy of hydrogen atom is -13.6 eV . The potential energy of the electron in this state is
A
27.2 eV
B
-27.2 eV
C
-13.6 eV
D
13.6 eV
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