Practice Physics Questions and Answers

• 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-
•  Photovoltaic cells are: 
• Which of the following is the best fire-extinguisher?
• During __________ motion of an object along a straight line, the change in velocity of the object for any time interval is zero.
• The motion of a freely falling body is an example of ______________ accelerated motion.
• The SI unit of electric current is:
• Which pioneer scientist used radio waves to transmit signals over distances of several kilometres in the 1890s?
• The blades of a moving jet engine are an example of:
• Which of the following types of waves has the smallest wavelength?
• The energy possessed by a body due to its position or shape is known as:
• Why does the pole star appear to be fixed in one place while all other stars seem to move from east to west?
• What is the SI unit of power?
• What is the speed of light in air?
• A ray of light from the object parallel to principal axis of a concave lens, after refraction appears to diverge from which point on the same side of the l...
• What does friction cause to the screws, ball bearings and soles of the shoes?
• ______ is an important metal to form amalgam.
• What is the SI unit of G — the universal gravitation constant?
• A concave lens has a focal length 15 cm. If the object is placed at 30 cm from the lens, what is the image distance?
• Which device uses ultrasonic waves for getting images of internal organs of human body?
• Why is red colour preferred for danger signal lights?