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Students ,
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generated by : www.My-Teacher.in ?
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incorrect and what is the correct option – and why !
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Regards / hemen Parekh
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BILLION , unique Question Papers , it is just impossible that you
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you try !
Question No 1 :
An electron is
accelerated through a potential difference of 10,000 V. Its de-Broglie
wavelength is, (nearly):
Your Options are :
1.2 × 10^-12 m
1.2 × 10^-14 m
1.2 nm
1.2 × 10^-13 m
Question
No 2 :
An inductor of 20
mH, a capacitor of 50 μF, and a resistor of 40Ω are connected in series across
a source of emf V = 10340 sin(t). What is the power loss in the AC circuit?
Your Options are :
0.67 W
0.76 W
0.89 W
0.51 W
Question
No 3 :
The energy of a
photon ejected when the electron jumps from n=3 state to n=2 state of hydrogen
is approximately?
Your Options are :
1.5 eV
0.85 eV
3.4 eV
1.9 eV
Question
No 4 :
What is the
formula for kinetic energy?
Your Options are :
KE = 1/2 mv²
KE = mv
KE = mgh
KE = 2mv
Question
No 5 :
A point mass m is
moved in a vertical circle of radius r with the help of a string. The velocity
of the mass is 7gr at the lowest point. The tension in the string at
the lowest point is
Your Options are :
6mg
7mg
8mg
1mg
Question
No 6 :
What is the
velocity of B when angle α = 60° if A is moving at 10 m/s?
Your Options are :
9.8 m/s
10 m/s
5.8 m/s
17.3 m/s
Question
No 7 :
The energy of
ground electronic state of hydrogen atom is -13.6 eV. The energy of the first
excited state will be?
Your Options are :
-54.4 eV
-27.2 eV
-6.8 eV
-3.4 eV
Question
No 8 :
For protecting a
sensitive equipment from the external magnetic field, it should be
Your Options are :
placed inside an aluminium can
placed inside an iron can
wrapped with insulation around it when passing current
through it
surrounded with fine copper sheet
Question
No 9 :
The cylindrical
tube of a spray pump has radius R, one end of which has n fine holes, each of
radius r. If the speed of the liquid in the tube is v, the speed of the
ejection of the liquid through the holes is
Your Options are :
v R \frac{n}{r^2}
v R \frac{n}{r^2}
v R \frac{n}{r^3}
v \frac{R}{n r^2}
Question No 10 :
The number of
translational degree of freedom for a diatomic gas is
Your Options are :
2
3
5
6