ency wes riol lange
(XXI) The de-Broglie wavelength of a tennis ball of mass 66g moving with velocity of 10 m/s
is approximately
(a)
10-33m
(b) 10-31m
10-16m
10-25m
(XXII) Atoms having different atomic number as well as different mass number but having
same number of neutrons are called
(a) isotopes (b) isobars (c) isotones (d) radioisotopes
(XXIII) Which of the following in motion can not be deflected by magnetic field?
(a) electron (b)
proton
sodium ion
neutron
TRUE / FALSE:
(XXIV)
(XXV)
(XXVI)
(XXVII)
(XXVIII)
Semiconductors can only be doped with pentavalent impurity.
The shape of equipotential surface due to point charge is always spherical.
Magnetic dipole moment is a scalar quantity.
The power of thick lens is smaller than that of thin lens.
In moving coil galvanometer, we use radial magnetic field so that the scale is
linear.
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Answer:
XXI- b
XXII-c
XXIII- neutron
XXIV- false
XXV- true
XXVI- false
XXVII-false
XXVIII-true
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