Test 20
General Science
English
Physics
Timer :
60
Your Score is
0
Correct Answer : + 1
Incorrect Answer : -0.25
Instructions
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The test consists of multiple-choice questions (MCQs).
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Each question has four options, out of which only one is correct.
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For each correct answer, one mark will be awarded.
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For each incorrect answer, 0.25 marks will be deducted.
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No marks will be given for unanswered questions.
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The test has a timer. If the time is up, your answers will be automatically submitted.
Q. 1
A device which is used to limit the current in an electrical circuit is called a
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Q. 2
Hypermetropia or long sight can be corrected by using :
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Q. 3
Stars appear twinkling because of.................of light.
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Q. 4
Speed of sound in air is unaffected by change in :
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Q. 5
The audio signals of TV are:
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Q. 6
In mirrors the back surface is coated with a thin layer of:
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Q. 7
A bomb at rest explodes into a large number of tiny fragments. The total momentum of all the fragments
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Q. 8
An optically plane surface reflects a beam of light
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Q. 9
The slope of a velocity-time graph represents
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Q. 10
The earth-wire of a cable is connected to
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Q. 11
Water is used in car radiator because of its
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Q. 12
How much mechanical work must be done to completely melt 1 gram of ice at 0°C?
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Q. 13
A bullet is fired from a rifle which recoils after firing. The ratio of kinetic energy of the rifle to that of the bullet is
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Q. 14
Heat stored in water vapour is
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Q. 15
The layer of atmosphere used for radio-wave transmission is
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Q. 16
Negative feedback in amplifiers
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Q. 17
Water cannot be used to extinguish fire caused by electric current, because
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Q. 18
A periscope works on the principle of
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Q. 19
A copper disc has a hole. If the disc is heated, the size of the hole
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Q. 20
A rear-view mirror for driving is
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