In a hydrogen discharge tube it is observed that through a given cross-section 3.13 
electrons are moving from right to left and 3.12 protons are moving from left to right. What is the electric current in the discharge tube and what is its direction
|
(a) 1 mA towards right |
(b) 1mA towards left |
|
(c) 2mA towards left |
(d) 2mA towards right |
(a) 1 mA towards right
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In the following circuit find I1 and I2
|
(a) 0, 0 |
(b) 5 mA, 5 mA |
(c) 5 mA, 0 |
(d) 0, 5 mA |
Photo-electric effect can be explained by
|
(a) Corpusular theory of light |
(b) Wave nature of light |
|
(c) Bohr’s theory |
(d) Quantum theory of light |
In any fission process the ratio 
is
|
(a) Less than 1 |
|
(b) Greater than 1 |
|
(c) Equal to 1 |
|
(d) Depends on the mass of the parent nucleus |
The ground state energy of hydrogen atom is – 13.6 eV. What is the potential energy of the electron in this state
| (a) 0 eV | (b) – 27.2 eV | (c) 1 eV | (d) 2 eV |
A charge q is located at the centre of a cube. The electric flux through any face is
|
(a) |
(b) |
(c) |
(d) |
The relation between n1 and n2, if behaviour of light rays is as shown in figure is
|
(a) |
(b) |
(c) |
(d) |
