KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Physics: Questions 156 - 160 of 253

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Question number: 156

» Atoms and Nuclei » Composition and Size of Nucleus

MCQ▾

Question

A nucleus of bismuth emits three electrons followed by two alpha particles. The resulting nucleus will have –

Choices

Choice (4) Response

a.

78 protons and 134 neutrons

b.

82 protons and 92 neutrons

c.

82 protons and 128 neutrons

d.

80 protons and 119 neutrons

Question number: 157

» Magnetic Effects of Current and Magnetism » Biot - Savart Law

MCQ▾

Question

Three infinitely long identical conductors are placed along OX, OY and OZ of coordinate axes, O being their common end. Current in OX is 2I and those in OY and OZ are I and I. The magnetic field at point P (0, -d, 0) is –

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 158

» Electrostatics » Capacitors

MCQ▾

Question

70 sheets of mica, each of thickness 0.25 mm are interspersed with aluminum foils of area 50 cm2. The metal sheets are connected alternately to form a system of capacitors. The capacitance of the capacitor is –

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 159

» Laws of Motion » Dynamics of Uniform Circular Motion

MCQ▾

Question

A solid sphere of mass 5 kg rolls on a smooth horizontal surface at . It then rolls up a smooth inclined plane of inclination 600 with the horizontal. The height attained by the sphere before it stops is

Choices

Choice (4) Response

a.

9.8 m

b.

10.28 m

c.

11.14 m

d.

12.22 m

Question number: 160

» Oscillations and Waves » Doppler Effect in Sound

MCQ▾

Question

A tuning fork vibrating at 160 Hz produces a sound wave which travels in air at a speed 300 ms-1. The distance travelled by sound during the time the fork makes 70 vibrations is,

Choices

Choice (4) Response

a.

127 m

b.

131 m

c.

137 m

d.

120 m

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