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In electrolysis, if the duration of the passage of current is doubled, the mass liberated i
|
(a) Doubled |
(b) Halved |
(c) Increased four times |
(d) Remains the same |
When a charged particle enters a uniform magnetic field its kinetic energy
|
(a) Remains constant |
(b) Increases |
(c) Decreases |
(d) Becomes zero |
The energy stored in a condenser of capacity C which has been raised to a potential V is given by
|
(a) |
(b) |
(c) CV |
(d) |
Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset?
A and B are two radioactive substances whose half lives are 1 and 2 years respectively. Initially 10 gm of A and 1 gm of B is taken. The time (approximate) after which they will have same quantity remaining is
|
(a) 6.62 years |
(b) 5 years |
(c) 3.2 years |
(d) 7 years |
A potential difference of 300 volts is applied to a combination of 2.0mF and 8.0mF capacitors connected in series. The charge on the 2.0mF capacitor is
|
(a) 2.4 |
(b) 4.8 |
(c) 7.2 |
(d) 9.6 |
