In an electrolyte 3.2 
bivalent positive ions drift to the right per second while 3.6 monovalent negative ions drift to the left per second. Then the current is
|
(a) 1.6 amp to the left |
(b) 1.6 amp to the right |
(c) 0.45 amp to the right |
(d) 0.45 amp to the left |
(b) 1.6 amp to the right
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A conductor ABOCD moves along its bisector with a velocity of 1 m/s through a perpendicular magnetic field of 1 wb/m2, as shown in fig. If all the four sides are of 1m length each, then the induced emf between points A and D is
|
(a) 0 |
(b) 1.41 volt |
(c) 0.71 volt |
(d) None of the above |
If the ratio of intensities of two waves is 1 : 25, then the ratio of their amplitudes will be
|
(a) 1 : 25 |
(b) 5 : 1 |
(c) 26 : 24 |
(d) 1 : 5 |
Keeping dissimilar poles of two magnets of equal pole strength and length same side, their time period will be
| (a) Zero | (b) One second | (c) Infinity | (d) Any value |
Two different coils have self-inductance 
,
. The current in one coil is increased at a constant rate. The current in the second coil is also increased at the same rate. At a certain instant of time, the power given to the two coils is the same. At that time the current, the induced voltage and the energy stored in the first coil are 
and 
respectively. Corresponding values for the second coil at the same instant are 
and 
respectively. Then
|
(a) |
(b) |
(c) |
(d) a, b, c |
$\lambda\geq\lambda_0$
$\lambda\geq2\lambda_0$
$\lambda\leq\lambda_0$
$\lambda<\frac{\lambda_ 0}{2}.$
