KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Physics: Questions 156 - 160 of 253
Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 253 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.
Rs. 200.00 or
Question number: 156
» Atoms and Nuclei » Composition and Size of Nucleus
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
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
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
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
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 |
|