Which of the following is the main characteristic of electromagnets that makes them useful in cranes and doorbells...? Mcqs

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Which of the following is the main characteristic of electromagnets that makes them useful in cranes and doorbells...?

(A) They are very strong
(B) They are permanent

(C) They can be switched on and off
(D) They are very heavy

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Water waves pass from deep into the shallow region and are then refracted. The characteristics of waves which will remain constant is _____...?

(A) Direction
(B) Frequency

(C) Speed
(D) Wavelength

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Which triplet in DNA codes for valine ...?

(A) CTT
(B) AGU

(C) CAT
(D) AAT

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Plasmids are most often found in:...?

(A) Bacteria
(B) Virus

(C) Fungi
(D) Viroid

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The highest percentage of fat is present in which, organ of fish...?

(A) Meat
(B) Brain

(C) Skeleton
(D) Vessels

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Comets revolves around...?

(A) The sun
(B) The Moon

(C) The Earth
(D) Venus

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_______________ causes biomagnification problem in the Ecosystem....?

(A) Lead
(B) Mercury

(C) Chromium
(D) Copper

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What is the escape velocity on Earth...?

(A) 7.9 km/s
(B) 9.8 km/s

(C) 11.2 km/s
(D) 12.4 km/s

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A force of 15 N makes an angle of 60° with horizontal. Its vertical component will be ____...?

(A) 15 N
(B) 10 N

(C) 13 N
(D) 7 N

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All of the following substances are crystalline except_____________...?

(A) Ice
(B) Diamond

(C) Sucrose
(D) Plastic

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