Practice Physics Questions and Answers

• Speed of sound in air is unaffected by change in :
• Who defined the law of gravitation? 
• A simple microscope consists of :
• The instrument which uses sound waves to measure the depth of oceans is –
• One Kilowatt hour is equal to—
• How much calorie of energy is released by a boiled egg?
• Smog is a combination of –
• For which type of motion, the distance time graph is not a straight line and can be any kind of curve?
• Heat stored in water vapour is –
• A rear-view mirror for driving is –
• The important unit of a microprocessor is –
• The time period of a second’s pendulum is –
• The instrument for measuring intensity of earthquakes is called –
• Which one of the following animals can hear ultrasonic sound?
• ‘Therm' is the unit of –
• Which law is also called the law of inertia?
• Which of the following circuit elements is used to 'block' DC in an electronic circuit?
• Which of the following statements is true when we see 'rainbow'?
• Pulsars are :
• Which atmospheric layer contains ozone layer?
• The device used for locating submerged objects under sea is –
• If input frequency of a full wave rectifier be n, then output frequency would be-
• Panchayat was added to our constitution through which amendment? 
• Which of the following liquids has the least density?
• The hair of shaving brush clings together when removed from water due to –
• In the atmosphere ultraviolet rays are absorbed by –
• Which of the following instruments is used to measure humidity?
• Which compound is used to prepare water proof clothes?
• Which Nobel Gas is also known as ‘Stranger Gas’?
• Which Metal is found in the highest proportion in earth’s crust?
• Which of the following statements is incorrect?
• The loudness of the sound depends upon 
• The waves which are less than 20Hz are known as 
• The hormone related to drought tolerance is-
• Where is the gravitational acceleration zero?
• The momentum of a body depends on:
• A storm is predicted if atmospheric pressure:
• Who discovered the electron?
• What is the cause of hypermetropia?
• The energy of wind is-