1
TG EAPCET 2024 (Online) 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
An inductor of inductive reactance $R$, a capacitor of capacitive reactance $2 R$ and a resistor of resistance $R$ are connected in series to an AC source. The power factor of the series $L-C-R$ circuit is
A
$\frac{1}{\sqrt{2}}$
B
$\frac{1}{\sqrt{3}}$
C
$\frac{1}{4}$
D
$\frac{\sqrt{3}}{2}$
2
TG EAPCET 2024 (Online) 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The efficiency of a bulb of power 60 W is $16 \%$. The peak value of the electric field produced by the electromagnetic radiation from the bulb at a distance of 2 m from the bulb is $\left(\frac{1}{4 \pi \varepsilon_{0}}=9 \times 10^{9} \mathrm{Nm}^{2} \mathrm{C}^{-2}\right)$
A
$24 \mathrm{Vm}^{-1}$
B
$16 \mathrm{Vm}^{-1}$
C
$9 \mathrm{Vm}^{-1}$
D
$12 \mathrm{Vm}^{-1}$
3
TG EAPCET 2024 (Online) 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The work function of a photosensitive metal surface is 1.1 eV . Two light beams of energies 1.5 eV and 2 eV incident on the metal surface. The ratio of the maximum velocities of the emitted photoelectrons is
A
$3: 4$
B
$1: 1$
C
$2: 3$
D
$4: 9$
4
TG EAPCET 2024 (Online) 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The ground state energy of hydrogen atom is -13.6 cv . The potential energy of the electron in the first excited state of hydrogen is
A
-6.8 eV
B
-3.4 eV
C
-13.6 eV
D
-272 eV
EXAM MAP