Physics (2018) | Study Mode

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Question 1

A man walks 1km due east and then 1 km due north His displacement

?2km N 45E

1km N 30E

1km N 15E

?2km N 60E

Explanation

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Correct option: A

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Question 2

The density of 400cm of palm oil was 0.9gcm-3 before frying. If the density of the oil was 0.6gm-3 after frying, assuming no loss of oil due to spilling, its new volume was?

1360cm\(^3\)

600cm\(^3\)

240cm\(^3\)

8000m\(^3\)

Explanation

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Correct option: B

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Question 3

Natural radioactivity consists of the emission of

- particles and - rays

- particles and X-rays

- particles, - rays and -rays

- rays and X-rays

Explanation

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Correct option: C

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Question 4

Which of the following is true of an electrical charge?

Positive charge means deficit electrons

Negative charge means excess of electrons

electric current means movement of electrons

All of the above

Explanation

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Correct option: D

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Question 5

Which of the following does NOT describe the Image formed by a plane minor?

Erect

Laterally inverted

Same distance from mirror as object

Magnified

Explanation

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Correct option: D

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Question 6

What is the resultant resistance of the circuit in the image shown?

3.6

Explanation

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Correct option: A

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Question 7

Which of the following best describes the energy changes which take place when a steam engine drives a generator which lights a lamp?

heat ----> Light----> Sound ----> Kinetic

Kinetic ----> Light ----> Heat ----> Electricity

heat ----> Kinetic ----> Electricity ----> Heat and Light

electricity ----> Kinetic ----> Heat ----> Light

Explanation

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Correct option: C

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Question 8

Cathode rays are

High-energy electromagnetic waves

protons

neutrons

streams of electrons

Explanation

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Correct option: D

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Question 9

A narrow beam of white light can be split up into different Colours by a glass prism. The correct explanation is that

white light Is an electromagnetic wave

the prism has all the colours of the white light

different colours of white light travel with different speeds in glass

white light has undergone total Internal reflection in the prism

Explanation

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Correct option: C

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Question 10

The diagram shown represents a block-and-tackle pulley system on which an effort of W Newtons supports a load of 120.0N. If the efficiency of the machine is 40, then the value of W is?

28.0

48.0N

233.0N

50.0N