N identical spherical drops charged to the same potential V are combined to form a big drop. The potential of the new drop will be
|
(a) V |
(b) V/N |
(c) V × N |
(d) V × |
(d) V × 
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The energy in MeV is released due to transformation of 1 kg mass completely into energy (c = 3
| (a) 7.625 ×10 MeV |
(b) 10.5 
|
(c) 2.8 
|
(d) 5.625
|
The effective resistance between points A and B is
|
(a) 10 Ω |
(b) 20 Ω |
|
(c) 40 Ω |
(d) None of the above three values |
When a current is passed through water, acidified with a dilute sulphuric acid, the gases formed at the platinum electrodes are
|
(a) 1 vol. hydrogen (cathode) and 2 vol. oxygen (anode) |
|
(b) 2 vol. hydrogen (cathode) and 1 vol. oxygen (anode) |
|
(c) 1 vol. hydrogen (cathode) and 1 vol. oxygen (anode) |
|
(d) 1 vol. oxygen (cathode) and 2 vol. hydrogen (anode) |
$\vec{\text{v}},\ \vec{\text{v}}_1$ and $\vec{\text{v}}_2$ must be parallel to each other.
$\vec{\text{v}}_1+\vec{\text{v}}_2$ must be parallel to $\vec{\text{v}}.$
$\text{m}_1\vec{\text{v}}_1+\text{m}_2\vec{\text{v}}_2$ must be parallel to $\vec{\text{v}}.$
The electromagnetic waves do not transport
| (a) Energy | (b) Charge | (c) Momentum | (d) Information |