- CH.PHYSICS

# lesson wise important questions for class 11 students

__Units and Measurements__

__Units and Measurements__

1. **Explain parallax method to measure the largest distances. **

**2. Explain how diameter of a planet can be measured.**

**3. How to estimate the small distances? Explain a scientific method. **

**4. Define the terms Accuracy, precision and error. **

**5. What is an error? Explain their types. **

**6. How to measure the magnitude of an error? Give different methods to measure the magnitude of error. **

**7. Define the term significant figure.**

**8. What is dimensional formula? What are its applications? Explain each with an example.**

**9. Explain about fundamental forces in nature.**

__Motion in a Straight Line__

__Motion in a Straight Line__

1. **Define the following terms. **

**a. Distance **

**b. Displacement**

**c. Uniform motion**

**d. Average speed**

**e. Average velocity**

**f. Instantaneous speed**

**g. Instantaneous velocity. **

**h. Acceleration**

**2. Derive kinematic equations for uniformly accelerated motion. **

**3. Derive the equations for maximum height achieved by an object and time of flight. **

**4. Define the term relative velocity. Give an example and explain. **

**5. Discuss various possibilities of s-t graph, v-t graph and a-t graph. **

__Motion in a plane__

__Motion in a plane__

1. **Define the terms scalar and vector. Give examples for each. **

**2. Explain different properties of vector addition and subtraction. **

**3. How to resolve a vector. Explain with an example. **

**4. Define Scalar product (Dot product) and vector product(Cross product)**

**5. Discuss vector addition in detail. And hence prove parallelogram law. **

**6. Using vector notation, define velocity and acceleration. **