1
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1

The light rays having photons of energy 4.2 eV are falling on a metal surface having a work function of 2.2 eV. The stopping potential of the surface is

A
6.4 V
B
2 eV
C
2 V
D
1.1 V
2
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1

Identify the function which represents a non-periodic motion.

A
$$\sin (\omega t + \pi /4)$$
B
$${e^{ - \omega t}}$$
C
$$\sin \omega t$$
D
$$\sin \omega t + \cos \omega t$$
3
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1

An inductor of inductance 2 mH is connected to a 220 V, 50 Hz ac source. Let the inductive reactance in the circuit is X1. If a 220 V dc source replace the ac source in the circuit, then the inductive reactance in the circuit is X2. X1 and X2 respectively are :

A
0.628 $$\Omega$$, infinity
B
6.28 $$\Omega$$, zero
C
6.28 $$\Omega$$, infinity
D
0.628 $$\Omega$$, zero
4
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1

The ratio of the magnitude of the magnetic field and electric field intensity of a plane electromagnetic wave in free space of permeability $${\mu _0}$$ and permittivity $${\varepsilon _0}$$ is (Given that c - velocity) of light in free space

A
$${{\sqrt {{\mu _0}{\varepsilon _0}} } \over c}$$
B
c
C
$${1 \over c}$$
D
$${c \over {\sqrt {{\mu _0}{\varepsilon _0}} }}$$
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