When the angle of refraction is 90° and the refractive index for water is 1. 33, the critical angle is ______...? Mcqs

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When the angle of refraction is 90° and the refractive index for water is 1. 33, the critical angle is ______...?

(A) 48.8°
(B) 50.0°

(C) 49.1°
(D) 51.0°

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What is the range, in hertz, of the normal human hearing...?

(A) 10 Hz to 10 kHz
(B) 20 Hz to 20 kHz

(C) 2000Hz
(D) 40 Hz to 40 kHz

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The PH of milk is __________...?

(A) 6.0
(B) 6.5

(C) 7.0
(D) 7.5

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A force applied on a body through the string is called_________...?

(A) Weight
(B) Momentum

(C) Tension
(D) Torque

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Bats can also fly in dark because they are capable of taking the help of _________...?

(A) Ultraviolet Waves
(B) Ultrasonic Waves

(C) Electromagnetic Waves
(D) Special Retina

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Intensity of gravitational field of earth is maximum at...?

(A) Poles
(B) Equator

(C) Center of earth
(D) Surface

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Which of the following scientific instruments is used to measure the atmospheric pressure...?

(A) Odometer
(B) Barometer

(C) Seismograph
(D) Audiometer

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Which three conditions are necessary for seed germination...?

(A) Water, Light, and Humidity
(B) Water, Nutrients, and Darkness

(C) Water, Carbon Dioxide, and Pressure
(D) Water, Oxygen, and Proper Temperature

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In data organization, which method is mostly useful...?

(A) Table
(B) Graph

(C) Ratio
(D) Both a and b

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Maintenance of soil fertility without addition of nutrition is due to...?

(A) Microbial Activity
(B) Crops residue

(C) Floods
(D) None of these

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