1
TS EAMCET 2023 (Online) 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A boy is playing with the empty rim of a cycle wheel of radius 40 cm by rolling it along a horizontal road towards north with angular speed of $20 \mathrm{rad} \mathrm{s}^{-1}$. Considering the effect of magnetic field of earth, the e.m.f induced in the rim is

(Horizontal component of earth's magnetic field $=0.26 \mathrm{G}$ )

A
zero
B
$2 \mu \mathrm{~V}$
C
2.4 mV
D
3 V
2
TS EAMCET 2023 (Online) 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

In an ideal step up transformer, if the input voltage and input power are $V_1$ and $R_1$ respectively and the output voltage and output power are $V_2$ and $P_2$ respectively, then

A
$V_1=V_2 ; P_1=P_2$
B
$V_1>V_2 ; P_1>P_2$
C
$V_1
D
$V_1
3
TS EAMCET 2023 (Online) 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The correct statement among the following is

A
Electromagnetic waves cannot travel in vacuum
B
Electromagnetic waves are longitudinal waves
C
Electromagnetic waves are produced by charges moving with uniform velocity
D
Electromagnetic waves carry both energy and momentum as they propagate through space.
4
TS EAMCET 2023 (Online) 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The additional energy that should be given to an electron to reduce its de-Broglie wavelength from 1 nm to 0.5 nm is

A
four times initial energy
B
thrice the initial energy
C
equal to the initial energy
D
twice the initial energy
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