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For chain reaction to build up the size of the radioactive target should be______________?
0
A. Greater than the critical size
B. Less than the critical size
C. Equal to the critical size
D. All of above can build up a change reaction
If a car moves with a uniform speed of 2 ms-1 in a circle of radius 0.4. Its angular speed is______________?
A. 4 rad. S-1
B. 5 rad. S-1
C. 1.6 rad. S-1
D. 2.8 ms-1
Proton electron neutron and a particles have same momentum. Which of them have highest K.E ?
A. Proton
B. electron
C. neutron
D. a-particle
For a simple pendulu,m the restoring force is caused by________________?
A. Gravity
B. Spring
C. Hand
D. All of these
The energy band occupied by the valence electrons is called___________________?
A. Energy state
B. Valence band
C. ve energy state
D. conduction band
Which one is true for internal energy ?
A. It is sum of all forms of energies associated with molecules of a system
B. It is a state function of a system
C. It is proportional to transnational K.E of the molecules
D. All are correct
Which one of following band is completely filled in case of conductors ?
A. Conduction band
B. Fermi band
C. Valence band
D. Forbidden band
Two parallel wires carrying currents in the opposite directions____________________?
A. repel each other
B. attract each other
C. have no effect upon each other
D. they cancel out their individual magnetic fields
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