The wavelength associated with an electron accelerated through a potential difference of 100 V is nearly
|
(a) 100 Å |
(b) 123 Å |
(c) 1.23 Å |
(d) 0.123 Å |
(c) 1.23 Å
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The graph gives the magnitude B(t) of a uniform magnetic field that exists throughout a conducting loop, perpendicular to the plane of the loop. Rank the five regions of the graph according to the magnitude of the emf induced in the loop, greatest first
|
(a) b > (d = e) < (a = c) |
(b) b > (d = e) > (a = c) |
|
(c) b < d < e < c < a |
(d) b > (a = c) > (d = e) |
A beam of well collimated cathode rays travelling with a speed of 5 
enter a region of mutually perpendicular electric and magnetic fields and emerge undeviated from this region. If |B| = 0.02T, the magnitude of the electric field is
|
(a) |
(b) 2.5 |
(c) 1.25 |
(d) 2 |
