kilohertz (kHz) is a unit which measures...? Mcqs

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kilohertz (kHz) is a unit which measures...?

(A) Power used by a current of one ampere
(B) Electromagnetic radio wave frequencies

(C) Voltage
(D) Electric resistance

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Light travelling in a straight line ______ when it strikes the surface of another medium....?

(A) Reflects
(B) Refracts

(C) Diffracts
(D) Absorbs

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Which of the following is a currency of Body cells...?

(A) ADP
(B) DNA

(C) RNA
(D) ATP

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For burning, which agent is necessary...?

(A) Oxygen
(B) Hydrogen

(C) Carbon
(D) Fire

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Matter changes state from solid to liquid and from liquid to gases, when it...?

(A) Loses energy
(B) Gains energy

(C) Remains same energy
(D) Has constant temperature

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The hottest stars are the blue stars and their temperature is around _____...?

(A) 25000°C
(B) 20000°C

(C) 15000°C
(D) 10000°C

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Which planet is called “red planet”...?

(A) Mars
(B) Venus

(C) Jupiter
(D) Saturn

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Which one of the following of glass can cut ultraviolet rays...?

(A) Jena Glass
(B) Soda Glass

(C) Pyrex Glass
(D) Crookes Glass

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The springs in brakes and clutches are used ______...?

(A) To restore original position
(B) To measure forces

(C) To absorb shocks
(D) To absorb strain energy

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Accumulation of salts in kidneys results in_________...?

(A) Diabetes
(B) Hypertension

(C) Cancer
(D) Kidney Stone

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