The power of a concave lens is_______________?
The power of a concave lens is_______________?
A. real
B. virtual
C. positive
D. negative
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A body is moving with uniform velocity. Its______________________?
A body is moving with uniform velocity. Its______________________?A. speed changes
B. acceleration changes
C. direction of motion changes
D. displacement from origin changesIn an X-ray tube electrons each of charge e are accelerated through V potential difference allowed to hit a metal target. The wavelength of the X-rays emitted is_______________?
In an X-ray tube electrons each of charge e are accelerated through V potential difference allowed to hit a metal target. The wavelength of the X-rays emitted is_______________?A. he/ev
B. he/Vc
C. eV/h
D. impossible to predictIn liquids and gases the current is due to the motion________________?
In liquids and gases the current is due to the motion________________?A. negative charges
B. positive charges
C. both negative and positive charges
D. neutral particlesThe natural frequency of simple pendulum depends upon_______________?
The natural frequency of simple pendulum depends upon_______________?A. It’s mass
B. It’s length
C. Square of its length
D. The square root of its lengthAverage energy required to remove one nucleon from the nucleus is called__________________?
Average energy required to remove one nucleon from the nucleus is called__________________?A. Binding energy per nucleon
B. Energy of decay
C. Destruction energy
D. All of aboveBlood vessels are______________?
Blood vessels are______________?A. Rigid
B. Not rigid
C. Of glass
D. Of rubber