Explanation:
$\text{i}=\text{i}_1\cos\omega\text{t}+\text{i}_2\sin\omega\text{t}$
$\text{I}_\text{rms}=\frac{\int\limits_0^\text{T}\text{I}^2\text{dt}}{\int\limits_0^\text{T}\text{dt}}$
if $\text{I}=\cos\omega\text{t}$
$\text{I}_\text{rms}^2=\frac{\text{I}_0^2}{2}$
$\text{i}=\text{i}_1\cos\omega\text{t}+\text{i}_2\sin\omega\text{t}$
Than $\text{i}_\text{rms}^2=\frac{\text{i}_1^2}{2}+\frac{\text{i}_2^2}{2}$
$\text{i}_\text{rms}=\sqrt{\frac{\text{i}_1^2+\text{i}_2^2}{2}}$
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A condenser has a capacity 2μF and is charged to a voltage of 50 V. The energy stored is
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(a) 25 × 105 Joule |
(b) 25 Joule |
(c) 25 × 10 erg |
(d) 25 × 103 erg |
A proton of mass 1.67 
and charge 1.6 
is projected with a speed of 2 
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(a) A circle of radius = 0.2 m and time period |
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(b) A circle of radius = 0.1 m and time period 2 |
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(c) A helix of radius = 0.1 m and time period 2 |
|
(d) A helix of radius = 0.2 m and time period 4 |
Consider the two following statements A and B and identify the correct choice given in the answers;
(A) In photovlotaic cells the photoelectric current produced is not proportional to the, intensity of incident light.
(B) In gas filled photoemissive cells, the velocity of photoelectrons depends on the wavelength of the incident radiation.
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(a) Both A and B are true |
(b) Both A and B are false |
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(c) A is true but B is false |
(d) A is false B is true |
Two metal spheres of radii 
and 
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(a) |
(b) |
(c) |
(d) |
A electron (q = 1.6 × 10–19 C) is moving at right angle to the uniform magnetic field 3.534 × 10–5 T. The time taken by the electron to complete a circular orbit is
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(a) 2 ms |
(b) 4 ms |
(c) 3 ms |
(d) 1 ms |
