NCERT (Physics) Class-VII
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| PhysicsDate Added: 2022-05-20 Which of the following statements is/are correct about heat? 1. It causes the sensation of hotness and coldness. 2. When a body is heated, its energy decreases. 3. S.I unit is Joule. Choose the correct option from the codes given below: | ||
| PhysicsDate Added: 2022-05-20 Which of the following statements is/are correct about laboratory thermometer? 1. Size is larger than clinical thermometer. 2. Range is 35-42 degree Celsius. 3. It is cylindrical in shape. 4. It has straight capillary. Choose the correct option from the codes given below: | ||
| PhysicsDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Conduction----objects should be in direct contact. 2. Convention------heat is carried by actual movement of hot particles 3. Radiation---------needs medium Choose the correct option from the codes given below: | ||
| PhysicsDate Added: 2022-05-20 Which of the following statements is/are correct for Celsius scale? 1. It was designed by Anders Celsius. 2. It is a metric scale of temperature. 3. It is called laboratory thermometer. Choose the correct option from the codes given below: | ||
| PhysicsDate Added: 2022-05-20 Which of the following is/are correct for simple pendulum? 1. Huygens suggested that a pendulum can be used to regulate clocks. 2. Rest position is also called mean position. 3. The maximum displacement from the mean position is called amplitude of the pendulum. Choose the correct option from the codes given below: | ||
| PhysicsDate Added: 2022-05-20 Which of the following is/are correct for uniform motion? 1. A body moving with constant speed. 2. The distance travelled is inversely proportional to time. Choose the correct option from the codes given below: | ||
| PhysicsDate Added: 2022-05-20 Which of the following is not a use of graph? | ||
| PhysicsDate Added: 2022-05-20 Which of the following is/are not correctly matched ? | ||
| PhysicsDate Added: 2022-05-20 Which of the following is/are correct for electrical circuit? 1. It is a continuous path. 2. It can be open or closed. 3. When electrical contact is broken, it is called a closed circuit. Choose the correct option from the codes given below: | ||
| PhysicsDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Heating effect of electric current--------production of heat in the resistor. 2. Magnetic effect of electric current------hans Christian Oersted. 3. Chemical Effect of electric current-------electric fuse. Choose the correct option from the codes given below: | ||
| PhysicsDate Added: 2022-05-20 Which of the following is/are correct for electric bell? 1. It is based on heating effect of electric current. 2. A U-shaped or horseshoe-shaped electromagnet is used. Choose the correct option from the codes given below: | ||
| PhysicsDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Open circuit-------------no flow of current 2. Copper--------------------good conductor 3. Nichrome--------------heavy loads Choose the correct option from the codes given below: | ||
| PhysicsDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Ray of light---straight line. 2. Beam of light -------- bundle of rays of light. 3. Divergent-------rays coming closer. Choose the correct option from the codes given below: | ||
| PhysicsDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Plane mirror-------highly polished surface. 2. Curved mirror-------reflecting surface is curved. Choose the correct option from the codes given below: | ||
| PhysicsDate Added: 2022-05-20 Which of the following is/are correct for reflection? 1. The ray of light which falls on the smooth polished surface is called the incident ray. 2. The ray of light which gets bounced off is reflected ray. 3. The angle of incidence is not equal to the angle of reflection. Choose the correct option from the codes given below: | ||
| PhysicsDate Added: 2022-05-20 Which of the following statements is/ are correct for a virtual image? 1. The rays of light actually meet at the point. 2. The image cannot be obtained on the screen. Choose the correct option from the codes given below: | ||
| PhysicsDate Added: 2022-05-20 Which of the following is/are correct for a convex lens? 1. It is thicker in the middle 2. It always forms virtual and erect image 3. It is a converging lens Choose the correct option from the codes given below: | ||
| PhysicsDate Added: 2022-05-20 Which of the following is/ are correctly matched? 1. Oscillation---------movement of a body. 2. Amplitude---------maximum displacement from mean position. 3. Frequency---------time period. Choose the correct option from the codes given below: | ||
| PhysicsDate Added: 2022-05-20 Which of the following is/ are correctly matched? 1. Sonic sound-------20-20000 Hz 2. Ultrasonic sound-------greater than 2000 Hz 3. Infrasonic sound--------less than 20 Hz Choose the correct option from the codes given below: | ||
| PhysicsDate Added: 2022-05-20 Which of the following difference between noise and musical sound is correct? NoiseMusical sound 1. Irregular waveformregular waveform 2. High Frequencylow frequency 3. Irregular and non-regular and periodic periodic vibrationvibration Choose the correct option from the codes given below: | ||
| PhysicsDate Added: 2022-05-20 Which of the following is/are effects of noise pollution? 1. Hearing Loss 2. Fatigue 3. Low blood pressure Choose the correct option from the codes given below: | ||
| PhysicsDate Added: 2022-05-20 Which of the following is/ are correct for electrolytic solution ? 1. Electrolyte conducts electricity when dissolved in water. 2. Sodium chloride, sugar solution, sulphuric acid are electrolytic solution. Choose the correct option from the codes given below : | ||
| PhysicsDate Added: 2022-05-20 Which of the following is/are correct for conductors? 1. They allow flow of electricity. 2. Solution of weak electrolyte are good conductors. Choose the correct option from the codes given below: | ||
| PhysicsDate Added: 2022-05-20 Which of the following is the correct order of the conductivity ? | ||
| PhysicsDate Added: 2022-05-20 Which of the following is/are the correct for LED: 1. It emits light only when weak current flows through it. 2. It is an electronic device. 3. The longer lead is positive. Choose the correct option from the codes given below: | ||
| PhysicsDate Added: 2022-05-20 Which of the following is/are the correctly matched? 1. Electrolyte--------------- conductor 2. Cation--------------------positive ion 3. Bakelite-----------------poor conductor Choose the correct option from the codes given below: | ||