Explanation:
During discharging of a cell terminal potential difference, the terminal potential difference is lesser than the emf of the cell. The direction of current inside the cell is from negative terminal to positive terminal.
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Three semi-conductors are arranged in the increasing order of their energy gap as follows. The correct arrangement is
|
(a) Tellurium, germanium, silicon |
(b) Tellurium, silicon, germanium |
|
(c) Silicon, germanium, tellurium |
(d) Silicon, tellurium, germanium |
Starting with a sample of pure 
of it decays into Zn in 15 min. The corresponding half-life is
| (a) 5 min |
(b) 7  min
|
(c) 10 min |
(d) 15 min |
A zone plate of focal length 60 cm, behaves as a convex lens, If wavelength of incident light is 6000
, then radius of first half period zone will be
|
(a) 36 |
(b) 6 |
(c) |
(d) 6 |
and 
represent mass of neutron and proton respectively. If an element having atomic mass M has N-neutron and Z-proton, then the correct relation will be
|
(a) |
(b) |
(c) |
(d) |
The combination of ‘NAND’ gates shown here under (figure) are equivalent to
|
(a) An OR gate and an AND gate respectively |
|
(b) An AND gate and a NOT gate respectively |
|
(c) An AND gate and an OR gate respectively |
|
(d) An OR gate and a NOT gate respectively. |
