Explanation:
The minimum capacitance can be obtained by connecting all capacitors in series. It can be calculated as follows:
$\frac{1}{\text{C}}=\frac{1}{6}+\frac{1}{6}+\frac{1}{6}=\frac{1}{2}$
$\Rightarrow\text{C}=2\mu\text{F}$
The maximum capacitance can be obtained by connecting all capacitors in parallel. It can be calculated as follows:
$\text{C}=6+6+6=18\mu\text{F}$
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The 6563 Å line emitted by hydrogen atom in a star is found to be red shifted by 5 Å. The speed with which the star is receding from the earth is
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(a) 17.29 × 109 m/s |
(b) 4.29 × 107 m/s |
(c) 3.39 × 105 m/s |
(d) 2.29 × 105 m/s |
The ratio of the energy of a photon with 
to that with 
is
|
(a) 2 |
(b) 1/4 |
(c) 4 |
(d) 1/2 |
The particles which can be added to the nucleus of an atom without changing its chemical properties are called
|
(a) Electrons |
(b) Protons |
(c) Neutrons |
(d) None of the above |
Three charges are placed at the vertices of an equilateral triangle of side ‘a’ as shown in the following figure. The force experienced by the charge placed at the vertex A in a direction normal to BC is
|
(a) |
(b) |
(c) Zero |
(d) |
A uniform electric field and a uniform magnetic field are produced, pointed in the same direction. An electron is projected with its velocity pointing in the same direction
|
(a) The electron will turn to its right |
|
(b) The electron will turn to its left |
|
(c) The electron velocity will increase in magnitude |
|
(d) The electron velocity will decrease in magnitude |
The work done in turning a magnet of magnetic moment 'M' by an angle of 90° from the meridian is 'n' times the corresponding work done to turn it through an angle of 60°, where 'n' is given by
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(a) 1/2 |
(b) 2 |
(c) 1/4 |
(d) 1 |
