PHYSICS HOMEWORK
GRADE: XII DATE:26th NOVEMBER 2017, Sunday
COMMON QUESTIONS
1. Can two independent sources of light be coherent to each other?
2. Describe an experiment with necessary theory by which the velocity of sound in air is determined by using resonance tube method.
3. Define Self Inductance. Derive an expression for energy stored in an inductor.
4. State and prove Braggs law.
5. Write the laws of transverse vibration of string. Explain how the law of length is verified experimentally.
6. What are coherent sources? Show that both bright and dark fringes are of same width in a Young’s double slits experiment.
7. State Biot’s and Savart’s law. Find the derivation of magnetic field at the axis of solenoid.
8. What is rectifier? Discuss the working of a full wave rectifier.
SET 1
1. A jet plane is travelling due west at the speed of 1800 km/hr. What is voltage difference developed between the ends of the wings 25 m long, if the earth’s magnetic field at the location is 5 × 10-4 T and dip angle is 30° .
2. In a resonance tube experiment, the first and the second resonance positions were observed at 17 cm and 52.6 cm respectively. The tuning fork used was frequency 512 Hz and the temperature was 27°C. Calculate the velocity of sound in air at 0° C and the end correction of the tube.
3. State and prove Braggs law.
4. Write the laws of transverse vibration of string. Explain how the law of length is verified experimentally.
5. What are coherent sources? Show that both bright and dark fringes are of same width in a Young’s double slits experiment.
6. State Biot’s and Savart’s law. Find the derivation of magnetic field at the axis of solenoid.
7. What is rectifier? Discuss the working of a full wave rectifier.
SET 2
1. 1. A piano string has a length of 2 m and density of 800 kg/m3. When the tension in the string produces a strain of 1%, the fundamental note obtained from the string in the transverse vibrations is 170 Hz. Calculate Young’s modulus for the material of the string.
2. 2. A horizontal straight wire of mass 0.12 gm and length 10 cm is placed perpendicular to a uniform horizontal magnetic field of flux density 0.6 T. If the resistance per unit length of the wire is 3.8 Ω/m, calculate the potential difference that has to be applied between the end of the wire to make it just self supporting.
3. State and prove Braggs law.
4. Write the laws of transverse vibration of string. Explain how the law of length is verified experimentally.
5. What are coherent sources? Show that both bright and dark fringes are of same width in a Young’s double slits experiment.
6. State Biot’s and Savart’s law. Find the derivation of magnetic field at the axis of solenoid.
7. What is rectifier? Discuss the working of a full wave rectifier.
SET 3
1. Explain why the soldiers are ordered to break their steps while crossing a bridge.
2. State and explain Lenz law.
3. In the production of X-ray, how will you control the penetrating power of X-rays?
4. State and prove Braggs law.
5. Write the laws of transverse vibration of string. Explain how the law of length is verified experimentally.
6. What are coherent sources? Show that both bright and dark fringes are of same width in a Young’s double slits experiment.
7. State Biot’s and Savart’s law. Find the derivation of magnetic field at the axis of solenoid.
8. What is rectifier? Discuss the working of a full wave rectifier.
SET 4
1. How does the temperature affect the frequency of an organ pipe?
2. How is magnetic field made radial in moving coil galvanometer?
3. Differentiate between conductor and semiconductor.
4. State and prove Braggs law.
5. Write the laws of transverse vibration of string. Explain how the law of length is verified experimentally.
6. What are coherent sources? Show that both bright and dark fringes are of same width in a Young’s double slits experiment.
7. State Biot’s and Savart’s law. Find the derivation of magnetic field at the axis of solenoid.
8. What is rectifier? Discuss the working of a full wave rectifier.
SET5
1. What are the conditions for constructive and destructive interference of light?
2. State and explain Lenz law.
3. In the production of X-ray, how will you control the penetrating power of X-rays?
4. State and prove Braggs law.
5. Write the laws of transverse vibration of string. Explain how the law of length is verified experimentally.
6. What are coherent sources? Show that both bright and dark fringes are of same width in a Young’s double slits experiment.
7. State Biot’s and Savart’s law. Find the derivation of magnetic field at the axis of solenoid.
8. What is rectifier? Discuss the working of a full wave rectifier.
GRADE: XII DATE:26th NOVEMBER 2017, Sunday
COMMON QUESTIONS
1. Can two independent sources of light be coherent to each other?
2. Describe an experiment with necessary theory by which the velocity of sound in air is determined by using resonance tube method.
3. Define Self Inductance. Derive an expression for energy stored in an inductor.
4. State and prove Braggs law.
5. Write the laws of transverse vibration of string. Explain how the law of length is verified experimentally.
6. What are coherent sources? Show that both bright and dark fringes are of same width in a Young’s double slits experiment.
7. State Biot’s and Savart’s law. Find the derivation of magnetic field at the axis of solenoid.
8. What is rectifier? Discuss the working of a full wave rectifier.
SET 1
1. A jet plane is travelling due west at the speed of 1800 km/hr. What is voltage difference developed between the ends of the wings 25 m long, if the earth’s magnetic field at the location is 5 × 10-4 T and dip angle is 30° .
2. In a resonance tube experiment, the first and the second resonance positions were observed at 17 cm and 52.6 cm respectively. The tuning fork used was frequency 512 Hz and the temperature was 27°C. Calculate the velocity of sound in air at 0° C and the end correction of the tube.
3. State and prove Braggs law.
4. Write the laws of transverse vibration of string. Explain how the law of length is verified experimentally.
5. What are coherent sources? Show that both bright and dark fringes are of same width in a Young’s double slits experiment.
6. State Biot’s and Savart’s law. Find the derivation of magnetic field at the axis of solenoid.
7. What is rectifier? Discuss the working of a full wave rectifier.
SET 2
1. 1. A piano string has a length of 2 m and density of 800 kg/m3. When the tension in the string produces a strain of 1%, the fundamental note obtained from the string in the transverse vibrations is 170 Hz. Calculate Young’s modulus for the material of the string.
2. 2. A horizontal straight wire of mass 0.12 gm and length 10 cm is placed perpendicular to a uniform horizontal magnetic field of flux density 0.6 T. If the resistance per unit length of the wire is 3.8 Ω/m, calculate the potential difference that has to be applied between the end of the wire to make it just self supporting.
3. State and prove Braggs law.
4. Write the laws of transverse vibration of string. Explain how the law of length is verified experimentally.
5. What are coherent sources? Show that both bright and dark fringes are of same width in a Young’s double slits experiment.
6. State Biot’s and Savart’s law. Find the derivation of magnetic field at the axis of solenoid.
7. What is rectifier? Discuss the working of a full wave rectifier.
SET 3
1. Explain why the soldiers are ordered to break their steps while crossing a bridge.
2. State and explain Lenz law.
3. In the production of X-ray, how will you control the penetrating power of X-rays?
4. State and prove Braggs law.
5. Write the laws of transverse vibration of string. Explain how the law of length is verified experimentally.
6. What are coherent sources? Show that both bright and dark fringes are of same width in a Young’s double slits experiment.
7. State Biot’s and Savart’s law. Find the derivation of magnetic field at the axis of solenoid.
8. What is rectifier? Discuss the working of a full wave rectifier.
SET 4
1. How does the temperature affect the frequency of an organ pipe?
2. How is magnetic field made radial in moving coil galvanometer?
3. Differentiate between conductor and semiconductor.
4. State and prove Braggs law.
5. Write the laws of transverse vibration of string. Explain how the law of length is verified experimentally.
6. What are coherent sources? Show that both bright and dark fringes are of same width in a Young’s double slits experiment.
7. State Biot’s and Savart’s law. Find the derivation of magnetic field at the axis of solenoid.
8. What is rectifier? Discuss the working of a full wave rectifier.
SET5
1. What are the conditions for constructive and destructive interference of light?
2. State and explain Lenz law.
3. In the production of X-ray, how will you control the penetrating power of X-rays?
4. State and prove Braggs law.
5. Write the laws of transverse vibration of string. Explain how the law of length is verified experimentally.
6. What are coherent sources? Show that both bright and dark fringes are of same width in a Young’s double slits experiment.
7. State Biot’s and Savart’s law. Find the derivation of magnetic field at the axis of solenoid.
8. What is rectifier? Discuss the working of a full wave rectifier.
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