An electron initially at rest, is accelerated through a potential difference of 200 volt, so that it acquires a velocity 8.4 
. The value of e/m of electron will be
|
(a) 2.76 |
(b) 1.76 |
(c) 0.76 |
(d) None of these |
(b) 1.76 
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The heat produced by a 100 watt heater in 2 minute will be equal to
|
(a) 12 |
(b) 10 |
(c) 6 |
(d) 3 |
64 drops each having the capacity C and potential V are combined to form a big drop. If the charge on the small drop is q, then the charge on the big drop will be
|
(a) 2q |
(b) 4q |
(c) 16q |
(d) 64q |
