Physics - Mock Test 1

Question 1

ध्वनि की तीव्रता (Intensity of Sound) मापने की इकाई क्या है?

A) हर्ट्ज़ (Hertz) B) डेसिबल (Decibel) C) पास्कल (Pascal) D) वाट (Watt)

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ध्वनि की तीव्रता को मापने के लिए डेसिबल (dB) इकाई का उपयोग किया जाता है। हर्ट्ज़ (Hz) ध्वनि की आवृत्ति (Frequency) मापने की इकाई है।

Question 2

When removed from water, the hairs of the shaving brush stick together. this is due to

A) surface tension B) viscosity C) elasticity D) friction

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Question 3

The distance time graph of an object moving with a constant speed is a

A) point B) circle C) straight line D) curve

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Question 4

The largest interval lying in

A) a B) b C) c D) d

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Question 5

AB is a vertical pole with B at the ground level and A at the top. A man finds that the angle of elevation of the point A from a certain point C on the ground is 60°. He moves away from the pole along the line BC to a point D such that CD = 7 m. From D the angle of elevation of the point A is 45°. Then the height of the pole is

A) a B) b C) c D) d

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Question 6

A person standing on the bank of a river observes that the angle of elevation of the top of a tree on the opposite bank of the river is 60º and when he retires 40 meters away from the tree the angle of elevation becomes 30º. The breadth of the river is

A) 40 m B) 30 m C) 20 m D) 60 m

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Question 7

Question based on image

A) a B) b C) c D) d

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Question 8

Which of the following is dimensionally correct

A) Specific heat = joule per kilogram kelvin B) Specific heat = newton per kilogram kelvin C) Specific heat = joule per kelvin D) None of the above

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Question 9

Which of the following physical quantities has neither dimensions nor unit

A) Angle B) Luminous intensity C) Coefficient of friction D) Current

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Question 10

Which of the following pairs have same dimensions

A) Torque and work B) Angular momentum and work C) Energy and Young's modulus D) Light year and wavelength

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