Approximately, how many times each day do our heart valves open and close normally...? Mcqs

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Approximately, how many times each day do our heart valves open and close normally...?

(A) 10,000
(B) 1,00,000

(C) 1,50,000
(D) 2,00,000

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Gamma rays have greatest similarity with...?

(A) a-rays
(B) X-rays

(C) b-rays
(D) U.V.-rays

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Which one of the following is oxidizing agent...?

(A) Al
(B) H2S

(C) Cl2
(D) NaH

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The hindrance to the flow of current is called...?

(A) Conductance
(B) Inductance

(C) Resistance
(D) Capacitance

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A___is a stiff bar that rests on a support called a fulcrum which lifts or move loads....?

(A) Pulley
(B) Wedge

(C) Screw
(D) Lever

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Which of the following is the lightest substance...?

(A) Uranium
(B) Hydrogen

(C) Oxygen
(D) Nitrogen

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When an oscillating object is in simple harmonic motion, its maximum speed occurs when the object is at its _____...?

(A) Highest point
(B) Lowest point

(C) Equilibrium point
(D) Extreme point

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The condition when the resistance of a circuit is zero is known as...?

(A) Closed-circuit
(B) Short circuit

(C) Open circuit
(D) Zero circuit

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The Distance of Neptune From Sun is ________ astronomical unit....?

(A) 28
(B) 30

(C) 32
(D) None of these

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The unit of torque in International system of unit is _________...?

(A) Newton
(B) Newton-Meter

(C) Kilogram
(D) Meter

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