1 ) Four resistors A , B , C and D form Wheatstone bridge is balanced when C = 100 ohm . If A and b are interchanged , the balances for C = 121 ohm , the value of D is ?
A ) 100 ohm , B
)
C ) 121 ohm , D ) None of these ,
Correct
Answer : - B )
2 )
The substance which undergoes plastic deformation until it breaks is called . .
. . . . . . . . . . . ( ductile substances ) .
3 )
A step up transformer , increases
voltage and decreases current , whereas
a stepdown transformer decreases voltage and increases current .
4 ) We have formula that : -
t =
n T(1/2).
So
, n = no. of half lives ,
T(
1/2 ) = half lives ,
5 )
A block weighting 40 kg extend a spring by 0.16 m from its position . What is value of k ?
A ) 1250 N /
m , B
) 2450 N / m ,
C ) 4250 N /
m , D
) None of these ,
Correct
Answer : - B ) 2450 N / m
,
Solution
: -
Formula
: -
F = k x ,
k = f / x = mg / x = (40 x 9.8 ) / 0.16 ,
k =
2450 N / m ,
Answer .
6 )
Alpha particles are . . . . . . . . . . . . . . . ( ionized helium atoms ) .
7 )
We can hear sound around the corner but cannot see because of diffraction but
diffraction light waves around the corner is not noticeable .
8 )
Which is constant for satellite in orbit : -
A ) kinetic energy
, B ) momentum ,
C ) acceleration , D
) None of these ,
Correct
Answer : - A ) kinetic energy ,
Kinetic
energy is constant throughout the satellite in motion .
Now go to online quiz section and Physics Quiz 9 is uploaded related to these mcqs , so check your preparation by this link : -
