The curves (a), (b) (c) and (d) show the variation between the applied potential difference (V) and the photoelectric current (i), at two different intensities of light (I1 > I2). In which figure is the correct variation shown
|
(a)
|
(b)
|
(c)
|
(d)
|
(b)
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An ammeter, suspected to give inaccurate reading, is connected in series with a silver voltameter. The ammeter indicates 0.54 A. A steady current passed for one hour deposits 2.0124 gm of silver. If the E.C.E. of silver is 1.118 
, then the error in ammeter reading is
|
(a) + 0.04 A |
(b) + 0.02 A |
(c) – 0.03 A |
(d) – 0.01 A |
With respect to air critical angle in a medium for light of red colour [
is q. Other facts remaining same, critical angle for light of yellow colour [
] will be
|
(a) θ |
(b) More than θ |
(c) Less than θ |
(d) |
Three electric bulbs of rating 60W each are joined in series and then connected to electric mains. The power consumed by these three bulbs will be
|
(a) 180 W |
(b) 60 W |
(c) 20 W |
(d) |
Ionization potential of hydrogen atom is 13.6 V.
Hydrogen atoms in the ground state are excited by monochromatic radiation of photon energy 12.1 eV. The spectral lines emitted by hydrogen atoms according to Bohr's theory will be
|
(a) One |
(b) Two |
(c) Three |
(d) Four |
The average e.m.f. induced in a coil in which the current changes from 2 ampere to 4 ampere in 0.05 second is 8 volt. What is the self inductance of the coil ?
|
(a) 0.1 H |
(b) 0.2 H |
(c) 0.4 H |
(d) 0.8 H |
For a nucleus to be stable, the correct relation between neutron number N and Proton number Z is
|
(a) N > Z |
(b) N = Z |
(c) N < Z |
(d) N ≥ Z |
