#science mcq

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In big showrooms and departmental stores, the vigilance mirror used is a

In big showrooms and departmental stores, the vigilance mirror used is a

In big showrooms and departmental stores, the vigilance mirror used is a (A) plane mirror (B) convex mirror (C) concave mirror (D) combination of a concave mirror and convex mirror (E) None of the above/More than one of above Answer: (B) Solution: In big showrooms and departmental stores, the vigilance mirror used is a convex mirror.

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When a bar magnet is placed in the earth's magnetic field, with its north pole pointing towards the geographical north, the number of neutral points around the magnet is

When a bar magnet is placed in the earth’s magnetic field, with its north pole pointing towards the geographical north, the number of neutral points around the magnet is

When a bar magnet is placed in the earth’s magnetic field, with its north pole pointing towards the geographical north, the number of neutral points around the magnet is (A) 2 (B) 4 (C) 6 (D) 5 (E) None of the above / More than one of the above Answer: (A) Solution: When a bar magnet is placed in the earth’s magnetic field, with its north pole pointing towards the geographical north, the…

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The hearing frequency range of cat is

The hearing frequency range of cat is

The hearing frequency range of a cat is (A) 20 Hz to 20 kHz (B) 20 Hz to 50 kHz (C) 45 Hz to 64 kHz (D) 10 Hz to 100 kHz (E) None of the above/More than one of the above Answer: (E) Solution: The hearing frequency range of a cat lies between 48 Hz and 85 kHz. Since none of the options indicated this range, the answer conclude to be an option (E).

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In a barber's shop, two plane mirrors are placed

In a barber’s shop, two plane mirrors are placed

In a barber’s shop, two plane mirrors are placed (A) parallel to each other (B) perpendicular to each other (C) at an angle of 45 degree (D) at an angle of 60 degrees. (E) None of the above/More than one of the above Answer: (A) Solution: In a barber’s shop, two plane mirrors are placed parallel to each other.

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During very cold weather, _____ of water helps in preserving aquatic life.

During very cold weather, _____ of water helps in preserving aquatic life.

During very cold weather, _____ of water helps in preserving aquatic life. (A) contraction (B) expansion (C) evaporation (D) sublimation (E)None of the above/More than one of the above Answer: (C) Solution: During very cold weather, anomalous expansion of water helps in preserving aquatic life.

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A sudden rise in the barometric

A sudden rise in the barometric

height indicates A sudden rise in the barometric height indicates (A) coming of storm or cyclone (B) possibility of rain (C) dry weather (D) extremely dry weather (E) None of the above/More than one of the above Answer: (C)

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The time period of a pendulum clock is

The time period of a pendulum clock is

The time period of a pendulum clock is (A) 1 second (B) 2 seconds (C) 1 minute (D) 1 hour (E) None of the above/More than one of the above Answer: (B) A pendulum clock takes one second to move from one side of the clock to the other. As a result, it takes 2 seconds for the clock to make a full swing.

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1 zepto is equal to

1 zepto is equal to

Q. 1 zepto is equal to (A) 10-25 (B) 1025 (C) 10-21 (D) 10-22 (E) None of the above/ More than one of the above Answer: (C) A zepto is a unit prefix—like kilo, milli, and centi—in the metric system representing a factor of 10−21, or 0.000000000000000000001.

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