A. antimony
B. phosphorus
C. aluminium
D. arsenic
Related Mcqs:
- Semi-conductors with donor atoms and free electrons belong to the type________________?
A. n
B. p
C. mix
D. any of above - Acceptor and donor impurities donate______________?
A. n-carriers only
B. p-carriers only
C. p-carriers and n-carriers respectively
D. n-carriers and p-carriers respectively - Which one of the following has the greatest energy gap ?
A. insulator
B. conductor
C. semi conductor
D. any of above - Which one of following band is completely filled in case of conductors ?
A. Conduction band
B. Fermi band
C. Valence band
D. Forbidden band - Which of the following pair has same direction always ?
A. force, displacement
B. force, velocity
C. force, acceleration
D. force, momentum - Which one of the following materials is useful for making bulb filaments ?
A. constantan
B. nichrome
C. copper
D. tungsten - Which of the following types of force can do no work on the particle on which it acts ?
A. frictional force
B. gravitational force
C. elastic force
D. centripetal force - An alternating current is represented by the equation I = I∫sinπt which of the following equation represents an alternating current of frequency and amplitude twice that of the above current ?
A. I = 2I∫Sin(πt/2)
B. I = 2I∫Sin(2πt)
C. I = 2ISinπt
D. I = I∫sin(2πt) - Rain drops fall from great height Which among the following statements is true regarding it?
A. they fall with that ultimate velocity, which are different for different droplets
B. they fall with same ultimate velocity
C. their velocity increases and they fall with different velocity on the earth
D. their velocity increases and they fall with same velocity on the earthSubmitted by: Abid Hussain
- Which of the following statements is true when we see ‘rainbow’ ?
A. We face sun and raindrops
B. The Sun remains behind us and we face raindrops
C. In light rainfall, we face Sun
D. The sky remains clear and the sun is at lower position in the skySubmitted by: Abid Hussain
