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Working Model of Physics for Class 9

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Working Model of Physics for Class 9. We covered all the Working Model of Physics for Class 9 MCQs in this post for free so that you can practice well for the exam.

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Working Model of Physics for Class 9 Objective for Students

Magnesium is used in:

(a) fireworks to make a bright white light

(b) gemstones in jewelry

(c) examination of the alimentary canal of the patient

(d) purification of water

Option a – fireworks to make a bright white light

Which one of the following types of radiations has the smallest wavelength?

(a) Microwaves

(b) Infrared

(c) Visible light

(d) X-rays

Option d – X-rays

Which of the following is not associated with the UNO?

(A) ILO

(B) WHO

(C) Security Council

(D) ASEAN

Show Answer

The instrument used for detecting the presence of electric current in a circuit is:

(a) Refractometer

(b) Galvanometer

(c) Viscometer

(d) Diffractometer

Option d – Galvanometer

Which of the following statements is NOT correct regarding the travel of sound waves?

(a) Sound waves can travel through water

(b) Sound waves can travel through the air

(c) Sound waves can travel through steel

(d) Sound waves can travel through a vacuum

Option d – Sound waves can travel through a vacuum

The International Court of Justice is located at?

(A) Geneva

(B) Hague

(C) Amsterdam

(D) Vienna

Show Answer

The cost of energy to operate an industrial refrigerator that consumes 5 kW of power working 10 hours per day for 30 days will be (Given that the charge per kWh of energy = ₹ 4):

(a) ₹ 600

(b) ₹ 6,000

(c) ₹ 1,200

(d) ₹ 1,500

Option b – ₹ 6,000

Two planets orbit the Sun in circular orbits, with their radius of orbit as R1 = T and R2 = 4R. The ratio of their periods (T1/T2) around the Sun will be:

(a) 1/16

(b) 1/8

(c) 1/4

(d) 1/2

Option b – 1/8

Light of uniform intensity impinges perpendicularly on a totally reflecting surface. If the area of the surface is halved, the radiation force on it will become:

(a) Double

(b) Half

(c) Four times

(d) One-fourth

Option b – Half

We covered all the working models of physics for class 9 mcqs above in this post for free so that you can practice well for the exam.

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