1 ) Electric field on
unit positive ( + ve ) charge at the
centre of sphere is . . . . . . . . ,
A ) finite , B
) infinite ,
C ) zero , D
) None of these ,
Correct Answer :
- C ) zero ,
2 ) The electric
field due to an infinitely long thin wire at a distance R varies as : - 1 / R .
3 ) 1 Tesla = . . . .
. . . . . . . . ,
A ) weber / m . B
) weber / m² ,
C ) m / weber . D
) None of these ,
Correct Answer :
- B ) weber / m² ,
4 ) Number of beats
per second is equal to the magnitude of difference between . . . . . . . . . .
. . of turning fork .
A ) frequency , B
) amplitude ,
C ) speed , D
) None of these ,
Correct Answer :
- A ) frequency ,
Number of beats per
second is equal to the magnitude of difference between frequency of turning
fork .
f1 – f2 = n
5 ) Fundamental
frequency : - f = ( 1 / 2Ï€ )
x √ (
T / M ) .
6 ) Law of conservation of energy : -
K.Ei + P.Ei = K.Ef
+ P.Ef ,
7 ) In-elastic
collision , which is conserved ?
A ) momentum , B
) kinetic energy ,
C ) both of these , D
) None of these ,
Correct Answer :
- A ) momentum ,
8 ) Elastic collision
is a collision in which . . . . . . . . . . . . . . is conserved .
A ) momentum , B
) kinetic energy ,
C ) both of these , D
) None of these ,
Correct Answer :
- C ) both of these ,
9 ) A communication
satellite of earth which takes 24 hours to complete orbit eventually has to be
replaced by another satellite of double mass .
If the new satellite has orbital time period of 24 hours . Then what is
the ratio of radius of new orbit to original orbit : -
A ) 1 : 1 , B ) 2 : 1 ,
C ) 1 : 2 , D
) None of these ,
Correct Answer :
- A ) 1 : 1 ,
Solution : -
