KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics: Questions 132 - 133 of 268

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Question number: 132

» Electrostatics » Capacitors

MCQ▾

Question

Three identical parallel plate capacitors of capacitance 2 µF each are connected in series with a battery of emf, 10 V as shown. Q is the charge on the capacitor. If two of the capacitors are now filled with a dielectric of dielectric constant k, the amount of charge which will flow through the battery is (neglect internal resistance of the battery)

Circuit diagram of three capacitors and a battery

Circuit Diagram of Three Capacitors and a Battery

In figure a circuit diagram consist of three capacitors and a battery is shown.

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 133

» Ray Optics » Snell's Law

Appeared in Year: 2015

MCQ▾

Question

Electromagnetic waves emanating from a point A (in air) are incident on a rectangular block of material M and emerge from the other side as shown. The angles i and r are angles of incidence and refraction when the wave travels from air to the medium. Such paths for the rays are possible

Electromagnetic waves travel through block of material M

Electromagnetic Waves Travel Through Block of Material M

In figure electromagnetic waves emanating from point A (in air) are incident on a rectangular block of material M and emerge from the other side.

Choices

Choice (4) Response

a.

only with gamma rays with a wavelength smaller than atomic nuclei of the material

b.

If the material has a refractive index less than zero

c.

If the material has a refractive index very nearly equal to zero

d.

only if the wave travels in M with a speed faster than the speed of light in vacuum.

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