Level 20: Technical Multidisciplinary Science Reasoning IQ

The magnetic effect of an electric current generates a magnetic field around the current-carrying coil of a metallic wire

1 Mark(s)

Your Answer:

A) When the electric current stops flowing through the coil
B) When the coil becomes hot due to the heating effect of the electric current
C) When the electric current is flowing through the coil
D) When the coil is brought near another magnet

A light ray is incident on a mirror and gets reflected by it. The angle made by the incident ray with the normal to the mirror is 40° . What is the angle made by the reflected ray with the mirror ?

1 Mark(s)

Your Answer:

40° 40°
50° 50°
45° 45°
60° 60°

Digital thermometers measure temperature using whichsensors?

1 Mark(s)

Your Answer:

A) Light sensors A) Light sensors
B) Sound sensors B) Sound sensors
C) Heat sensors C) Heat sensors
D) Pressure sensors D) Pressure sensors

How can you determine if an object is in motion?

1 Mark(s)

Your Answer:

A) If it changes position with respect to a reference point over time.
B) If it makes a sound. B) If it makes a sound.
C) If it is heavy. C) If it is heavy.
D) If it is colourful. D) If it is colourful.

Which of the following clocks are known to be the most precise?

1 Mark(s)

Your Answer:

A) Pendulum clock A) Pendulum clock
B) Atomic clock B) Atomic clock
C) Digital clock C) Digital clock
D) Quartz clock D) Quartz clock

Which of the following cannot be used for measurement of time?

1 Mark(s)

Your Answer:

A) A leaking tap A) A leaking tap
B) Simple pendulum B) Simple pendulum
C) Shadow of an object during the day C) Shadow of an object during the day
D) Blinking of eyes D) Blinking of eyes

The heat reaches to us from the sun in the form of:

1 Mark(s)

Your Answer:

A) Convection A) Convection
B) Radiation B) Radiation
C) Conduction C) Conduction
D) All of these methods D) All of these methods

When the light is incident along the normal on the mirror, which of the following statements is true?(NCERT Book Question)

1 Mark(s)

Your Answer:

angle of incidence is 90° angle of incidence is 90°
angle of incidence is 0° angle of incidence is 0°
angle of reflection is 90° angle of reflection is 90°
no reflection of light takes place in this case

Heat produced in a heating element on passing current through it depends on: (i) Nature of the material of the heating element (ii) Thickness of the wires of the element (iii) Colour of the element (iv) Length of the wire of the element Choose the combination of correct answers from the four options above.

1 Mark(s)

Your Answer:

A) (i) and (ii) only A) (i) and (ii) only
B) (i), (ii), and (iv) only B) (i), (ii), and (iv) only
C) All four are correct C) All four are correct
D) (ii) and (iii) only (i), (ii), and (iv) only

What tool can be used by visually challenged students to measure lengths?

1 Mark(s)

Your Answer:

A) Normal 15 – cm scale A) Normal 15 – cm scale
B) Digital scale B) Digital scale
C) Raised markings scale C) Raised markings scale
D) Normal measuring tape D) Normal measuring tape

Which of the following is/are not always necessary to observe a shadow?

1 Mark(s)

Your Answer:

A) Sun A) Sun
B) Screen B) Screen
C) Source of light C) Source of light
D) Opaque object D) Opaque object

A comb attracts tiny bits of paper due to :

1 Mark(s)

Your Answer:

friction friction
electrostatic force electrostatic force
gravitational force gravitational force
magnetic force magnetic force

At what temperature does molecular motion theoretically cease?

1 Mark(s)

Your Answer:

A) 0°C A) 0°C
B) – 100 °C B) – 100 °C
C) -273.15 °C C) -273.15 °C
D) – 500 °C 15 °C D) – 500 °C 15 °C

After using a thread to measure a curved line, what should you do next?

1 Mark(s)

Your Answer:

A) Measure the length of the thread against a straight scale.
B) Cut the thread. B) Cut the thread.
C) Mark the thread with a pen. C) Mark the thread with a pen.
D) Wrap the thread around the object again.

Why is it important to measure temperature accurately in scientific experiments?

1 Mark(s)

Your Answer:

A) To save time A) To save time
B) To ensure reproducibility and reliability of results
C) To use expensive equipment C) To use expensive equipment
D) To make experiments faster D) To make experiments faster

When we\are on a moving bus and look at the other passengers on the bus, what do we conclude about their motion?

1 Mark(s)

Your Answer:

A) They are in motion. A) They are in motion.
B) They are at rest. B) They are at rest.
C) They are jumping. C) They are jumping.
D) They are asleep. D) They are asleep.

A freely suspended bar magnet rests in

1 Mark(s)

Your Answer:

A) north-south directions A) north-south directions
B) east-west directions B) east-west directions
C) upside down C) upside down
D) any direction by chance D) any direction by chance

Which of the following is NOT a drawback of the heating effects of electric current?

1 Mark(s)

Your Answer:

A) Loss of electric energy during transmission
B) Melting of plastic sockets and plugs due to overheating
C) Heating of water with an immersion rod
D) Fires due to electric short circuits D) Fires due to electric short circuits

The Sl unit of weight is:

1 Mark(s)

Your Answer:

kilogram kilogram
newton newton
newton metre newton metre
Kilometre Kilometre

When electric current is passed through the filament of a bulb, it gives off:

1 Mark(s)

Your Answer:

Sound Sound
Heat Heat
Magnetism Magnetism
Light Light
A and B A and B
B and C B and C

Natural luminous object among the following is

1 Mark(s)

Your Answer:

A) tube light A) tube light
B) bulb B) bulb
C) moon C) moon
D) stars D) stars

Which of the following is NOT an SI unit of length?

1 Mark(s)

Your Answer:

A) Kilometre A) Kilometre
B) Centimetre B) Centimetre
C) Inch C) Inch
D) Millimetre D) Millimetre

What type of measuring tape/ scale is ideal for measuring curved lines?

1 Mark(s)

Your Answer:

A) Metal tape A) Metal tape
B) 15 cm scale B) 15 cm scale
C) Metre rod C) Metre rod
D) Flexible tape D) Flexible tape

Assertion (A): Infrared thermometers were widely used during the COVID-19 pandemic. Reason (R): Infrared thermometers can measure temperature without direct contact with the body.

1 Mark(s)

Your Answer:

A) Both A and R are true and R is correct explanation of the assertion,
B) Both A and R are true but R is not the correct explanation of the assertion,
C) A is true but R is false, C) A is true but R is false,
D) A is false but R is true Match the following items given in Column A with that in Column B:

A beggar wrapped himself with a few layers of newspaper on a cold winter night. This helped him to keep himself warm because

1 Mark(s)

Your Answer:

A) friction between the layers of newspaper produces heat.
B) air trapped between the layers of newspaper is a bad conductor of heat.
C) newspaper is a conductor of heat. C) newspaper is a conductor of heat.
D) newspaper is at a higher temperature than the temperature of the surrounding.

Which is an example of a magnetic substance?

1 Mark(s)

Your Answer:

A) Iron A) Iron
B) Nickel B) Nickel
C) Cobalt C) Cobalt
D) All of these D) All of these

What limits infiltration in urban areas?

1 Mark(s)

Your Answer:

A) Rainfall A) Rainfall
B) Sandy soil B) Sandy soil
C) Open spaces C) Open spaces
D) Concrete surfaces D) Concrete surfaces

Which of the following can never form acircular shadow?

1 Mark(s)

Your Answer:

A) A ball A) A ball
B) A flat disc B) A flat disc
C) A shoe box C) A shoe box
D) An ice cream cone D) An ice cream cone

Three magnets A, B and C were dipped one by one in a Figure shows the amount of the iron filing sticking to them. The strength of these magnets willbe

1 Mark(s)

Your Answer:

A) A > B > C A) A > B > C
B) A B) A
C) A = B = C C) A = B = C
D) A C Fill in the blanks with appropriate words: 1. When north-pole of one magnet is brought near the __________ of another magnet, they attract one another. Answer: south pole 2. When the north-pole of one magnet is brought close to the __________ of another magnet, they repel each other. Answer: north pole 3. Similar poles of two magnets __________ one another. Answer: repel 4. A compass needle always points in __________ a direction. Answer: north-south 5. Magnetic poles always __________ in pairs. Answer: exist 6. Materials which get __________ towards magnet are known as magnetic. Answer: attracted 7. The __________ of magnet where maximum iron filings get clung, are known as __________. Answer: ends, poles 8. Hammering destroys the __________ of small magnets inside. Answer: Magnetism 9. We should not drop the magnet, shouldn’t heat it, shouldn’t __________ it. Answer: hammer 3. State whether the statements given below are True or False: (i) Lodestone is composed of oxides of iron. Answer: True (ii) North and south poles are found to exist separately. Answer: False (iii) Magnetite doesn’t show magnetic properties. Answer: False (iv) If we cut a bar magnet in two halves we will have two magnets. Answer: True (v) Heat can destroy magnetic properties of a magnet. Answer: True (vi) Magnets are made up of different materials and in different shapes. Answer: True (vii) Compass needle is made of a magnet. Answer: True (viii) There is a maximum attraction in middle of a bar magnet. Answer: False 4. Match the following items given in Column A with that in Column B:

What is the SI unit of length?

1 Mark(s)

Your Answer:

A) Foot A) Foot
B) Inch B) Inch
C) Metre C) Metre
D) Yard D) Yard

Which of the following force is utilised in reducing air pollution by removing dust, soot and fly-ash particles from the smoke coming out of chimneys of factories ?

1 Mark(s)

Your Answer:

magnetic force magnetic force
gravitational force gravitational force
electrostatic force electrostatic force
frictional force frictional force

What two ends of a magnet are called?

1 Mark(s)

Your Answer:

A) North pole A) North pole
B) South pole B) South pole
C) North and south pole C) North and south pole
D) Self demagnetisation D) Self demagnetisation

What type of motion does a merry- go-round exhibit?

1 Mark(s)

Your Answer:

A) Linear motion A) Linear motion
B) Circular motion B) Circular motion
C) Oscillatory motion C) Oscillatory motion
D) Irregular motion D) Irregular motion

Voltaic cell uses _______________ electrolyte that is why it is not considered as convenient as a dry cell

1 Mark(s)

Your Answer:

A) coloured A) coloured
B) solid B) solid
C) liquid C) liquid
D) paste D) paste

A marble tile feels colder than a wooden tile on a winter morning, because the marble tile

1 Mark(s)

Your Answer:

A) is a better conductor of heat than the wooden tile.
B) is polished while wooden tile is not polished.
C) reflects more heat than wooden tile. C) reflects more heat than wooden tile.
D) is a poor conductor of heat than the wooden tile.

Evaluating Your Answers

Level 20: Technical Multidisciplinary Science Reasoning IQ : Question 1 of 35