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

The magnetic susceptibility of ferromagnetic materials is

A
$<0$
B
$>1$
C
1
D
0
2
TS EAMCET 2023 (Online) 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

If the vertical component of earth's magnetic field is $0.5 \times 10^{-4} \mathrm{~T}$ at a point. When an aeroplane of wing span 4 m is moving horizontally at this place at $360 \mathrm{kmh}^{-1}$, then the motional emf forced across the ends of the wings is

A
$20 \times 10^{-4} \mathrm{~V}$
B
$20 \times 10^{-2} \mathrm{~V}$
C
$20 \times 10^{-3} \mathrm{~V}$
D
$2 \times 10^{-4} \mathrm{~V}$
3
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
4
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
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