A parallel plate capacitor is made by stacking n equally spaced plates connected alternately. If the capacitance between any two plates is C then the resultant capacitance is
|
(a) C |
(b) nC |
(c) (n – 1)C |
(d) (n + 1)C |
(c) (n – 1)C
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Figure shows the ray diagram of a:
In Fresnel’s biprism (μ = 1.5) experiment the distance between source and biprism is 0.3 m and that between biprism and screen is 0.7m and angle of prism is 1°. The fringe width with light of wavelength 6000 Å will be
|
(a) 3 cm |
(b) 0.011 cm |
(c) 2 cm |
(d) 4 cm |
In the figure shown, for an angle of incidence 45°, at the top surface, what is the minimum refractive index needed for total internal reflection at vertical face
|
(a) |
(b) |
(c) |
(d) |
The electric field near a conducting surface having a uniform surface charge density σ is given by
|
(a) |
(b) |
|
(c) |
(d) |
The magnetic flux through a circuit of resistance R changes by an amount ∆∅ in time ∆t, Then the total quantity of electric charge Q, which passing during this time through any point of the circuit is given by
|
(a) Q = |
(b) Q = |
(c) Q = |
(d) Q = |
If resistance of voltmeter is 10000 W and resistance of ammeter is 2 W then find R when voltmeter reads 12V and ammeter reads 0.1 A
|
(a) 118 W |
(b) 120 W |
(c) 124 W |
(d) 114W |
