Recent questions in Olympiad-Science

Depletion of water table is due to

asked Nov 5, 2017 by priyanka.c

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When electric current passes through a wire, it acts as a

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Miniature circuit breakers automatically turns off when there is

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When is Newton's disc is rotated what would be the colour seen?

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Concave lens are _______ lens.

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Why is the word ambulance written as a virtual image in an ambulance van?

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What is the dark funnel shaped cloud that reaches the ground from the sky called?

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Process of applying a coat of zinc to prevent iron from rusting is called as ________.

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Camouflage of polar bears is due to ________.

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Which of the following are not the elements of weather?

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Temperature is measured in ________.

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Rohit's school is 800 meters away from his house. If he rides his bicycle at a speed of 2 m/s, how long will it take for him to reach his school?

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Which of the following is true?

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What is the process of transfer of heat with no medium called?

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Virtual images are formed by the ________

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The images formed by a plane mirror are always ________

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When does a virtual image occur ?

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The property of a conductor carrying current in the shape of a coil which behaves like a magnet is called as _________

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The circuit is complete when the electrical switch is in __________position.

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The longer line in the representation of a cell in an electric circuit represents _______

asked Nov 3, 2017 by priyanka.c

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The wind distributed throughout the lower atmosphere are called as ______

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What is the main reason behind wind generation ?

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The cosmic rays from the sun is deflected from entering the earth by _______

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After attending Arjun goes back home driving his car. He rode for 9 km in the east direction and found that he had crossed his house. In order to reach his home he had to travel 2 km in the west direction. The entire journey took him 5 hours. At what speed did Arjun travel averagely ?

asked Nov 3, 2017 by priyanka.c

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What is the metallic ball in a pendulum called?

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Prathithi enjoys playing in the swing. She moves fast as much as possible. Now what is the type of motion of the swing Prathithi is playing with?

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The day to day condition of the atmosphere at a place with respect to the temperature, rainfall, wind speed is called as _______.

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Heat energy is measure in the units of

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The rate of change of position of an object with time in a given direction is called

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A greater effort is required to stop a bullet from the gun than to stop a bullet of same mass which is thrown by the hand. This is due to

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The law of inertia was formulated by

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When a bus takes a sharp turn a person sitting in the bus experiences a force acting away from the centre of the curved path. This is due to

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Read the passage and answer the question below Different objects may take different amounts of time to cover a given distance. Some of them move fast and some move slowly. The rate at which objects move can be different. Also, different objects can move at the same rate. One of the ways of measuring the rate of motion of an object is to find out the distance travelled by the object in unit time. This quantity is referred to as speed. The SI unit of speed is ms-1. To specify the speed of an object we require only its magnitude. The speed of an object need not be a constant. In most cases, objects will be in non-uniform motion. Therefore we describe the rate of motion of such objects in terms of their average speed. The average speed of an object is the total distance divided by the total time taken. If the speed of the object is v, then v = s/t, where s I the distance travelled and t is the time taken. QUESTION : When an object covers unequal distances in equal intervals of time then it is said to be

asked Nov 3, 2017 by priyanka.c

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Read the following passage and answer the question below Different objects may take different amounts of time to cover a given distance. Some of them move fast and some move slowly. The rate at which objects move can be different. Also, different objects can move at the same rate. One of the ways of measuring the rate of motion of an object is to find out the distance travelled by the object in unit time. This quantity is referred to as speed. The SI unit of speed is ms-1. To specify the speed of an object we require only its magnitude. The speed of an object need not be a constant. In most cases, objects will be in non-uniform motion. Therefore we describe the rate of motion of such objects in terms of their average speed. The average speed of an object is the total distance divided by the total time taken. If the speed of the object is v, then v = s/t, where s I the distance travelled and t is the time taken. QUESTION : An object travels from A to B at 40 m/s and from B to A at 60m/s. Then its average speed is

asked Nov 3, 2017 by priyanka.c

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If the radius of the earth becomes twice its original radius without change in its mass, what will happen to your weight?

asked Nov 3, 2017 by priyanka.c

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An astronaut tries to drop an object from a height of 10 m on the surface of the moon. How long will it take to reach the moon's surface? [take g= $10m/s^2$]

asked Nov 3, 2017 by priyanka.c

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The value of g is

asked Nov 2, 2017 by priyanka.c

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The kinetic energy of a ball of mass 1kg moving at a speed of 20 cm/s is

asked Nov 2, 2017 by priyanka.c

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What will be the time taken to do 1320 J of work at the rate of 110W?

asked Nov 2, 2017 by priyanka.c

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The sensory cells of cochlea are called

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The term that describes how the brain interprets the frequency of sound is called

asked Nov 2, 2017 by priyanka.c

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The frequency of a sound wave has 1000 Hz and a wavelength of 34 cm. How long will it take to travel 1 km?

asked Nov 2, 2017 by priyanka.c

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The property of sound which is used in stethoscope is

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The wavelength of a sound wave whose frequency is 300 Hz and speed 330 m/s is

asked Nov 2, 2017 by priyanka.c

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When we increase the loudness of sound produced by a radio, the property of the sound wave that changes is

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Ultrasonic waves are used for detecting objects under water. What technique is used for this ?

asked Nov 2, 2017 by priyanka.c

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In which of the following cases is the potential energy of the spring minimum?

asked Nov 2, 2017 by priyanka.c

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The work done by the weight of a 1.5 kg mass when it moves through a distance of 2m is

asked Nov 2, 2017 by priyanka.c

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Read the passage below and answer the question If the displacement of an object is perpendicular to the force acting on it, the work done by the force on the object is zero. Consider for example, the force of gravity acting on an aero plane flying in the sky. The force of gravity is in the downward direction, whereas the aero plane's displacement is in the horizontal direction, I.e; the force and the displacement are perpendicular to each other. There is no displacement in the direction of the force of gravity, and therefore, the work done by it on the aero plane is zero. QUESTION : When the porter climbs up a staircase the work done is

asked Nov 2, 2017 by priyanka.c

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Read the passage carefully and answer question If the displacement of an object is perpendicular to the force acting on it, the work done by the force on the object is zero. Consider for example, the force of gravity acting on an aero plane flying in the sky. The force of gravity is in the downward direction, whereas the aero plane's displacement is in the horizontal direction, I.e; the force and the displacement are perpendicular to each other. There is no displacement in the direction of the force of gravity, and therefore, the work done by it on the aero plane is zero. QUESTION : A porter is moving a distance of 'd' m, with a heavy load on his head. The work done by this porter is

asked Nov 2, 2017 by priyanka.c

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