Nuclear fission experiments show that the neutrons split the uranium nuclei into two fragments of about same size. This process is accompanied by the emission of several
|
(a) Protons and positrons |
(b) a - particles |
|
(c) Neutrons |
(d) Protons and a-particles |
(c) Neutrons
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A ray of light is incident at the glass–water interface at an angle i, it emerges finally parallel to the surface of water, then the value of 
would be
|
(a) (4/3) sin i |
(b) 1/sin i |
(c) 4/3 |
(d) 1 |
A circular coil having N turns is made from a wire of length L meter. If a current I ampere is passed through it and is placed in a magnetic field of B Tesla, the maximum torque on it is
|
(a) Directly proportional to N |
(b) Inversely proportional to N |
|
(c) Inversely proportional to |
(d) Independent of N |
A long wire A carries a current of 10 amp. Another long wire B, Which is parallel to A and separated by 0.1m from A, carries a current of 5 amp, in the opposite direction to that in A. what is the magnitude and nature of the force experienced per unit length of B (
|
(a) Repulsive force of |
(b) Attractive force of |
|
(c) Repulsive force of 2π × |
(d) Attractive force of 2π |
