Explore topic-wise InterviewSolutions in Current Affairs.

This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.

1.

Connecting many devies to a singlesocket leads to 'short circuit'

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Solution :CONNECTING many DEVICES to a SINGLE socket leads to OVERLOAD in the CIRCUIT.
Discussion
2.

Assertion (A) : Rama Raju loves listening to Carnatic music played on Mridangam whereas his daughter Neeta gets irritated by it. Reason (R) : The sound that produces pleasant effect on our ears is called music and the sound that produces an unpleasant effect on our ears is called noise.

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Both A and R are CORRECT and R is the correct explanation of A.
Both A and R are correct but R is not the correct explanation of A.
A is correct and R is incorrect.
Both A and R are incorrect.

Solution :The correct reason for A in that it is difficult to CLASSIFY a given sound as music or noise as they may produce a pleasant EFFECT on one PERSON and an unpleasant effect on another person.
Hence,A and R are correct but R is not the correct reasons for A.
Discussion
3.

Answer the following question Define sublimatin

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Discussion
4.

The energy stored in an electric cell is

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CHEMICAL energy
electrical energy
heat energy
mechanical energy

Answer :A
Discussion
5.

Answer the following question Why boiling water is not used to sterilize a clinical thermometer?

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Solution :CLINICAL thermometers have a very small range, being from 20ºC to 45ºC in general. If placed in BOILING water, which is 100 degrees, damage will be CAUSED to the thermometer
Discussion
6.

s^(-1) is the unit of ______.

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ANSWER :C
Discussion
7.

By heating_______of substance can be changed

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size
temperature
STATE
all the above

SOLUTION :On heating substacne will UNDERGO chnge in size temperture and state .
Discussion
8.

When an object is moving witha unifrom speed, its average speed is equal to its speed

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Discussion
9.

Which of the following is not an electrical appliance ?

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WASHING machine
TV
Fire extinguisher
Water cooler

Answer :C
Discussion
10.

In a torch, we use ........... as the source of electricity.

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SOLUTION :DRY CELL
Discussion
11.

Which of the following geometrical plane figure cannot be drawn on a wooden board only by using a divider ?

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Both (a) and ( C )

ANSWER :D
Discussion
12.

We know that (a) like electrical charges repel each other and (b) substances which allow charges to move through them are called conductors. In the light of these facts, find where the charge placed ona conductor resides.

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SOLUTION :LET us consider a spherical conductor, and negative charge is placed at the CENTRE . Different negativelycharged particles repel each other. Because the BODY is a conductor. They are repelled to the boundarics. As such charge placed on a conductor, ALWAYS resideson outer surface of it.
Discussion
13.

A physics student took a number full of dry ice with a thermometer placed in ti .He strted supplying heat energy at constant rate by placing it on a heating device .The student observed no change in the thermometer reading even after 90 %of ice melted explain what happened to the heat energy supplied

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Solution :When ICE at `0^(@)C` is CHANGED in to WATER at `0^(@)C` the energhy is USED to increase the intermolecular spacing and to change in to the liquid state .The heat energy supplied is not used to increse the temperature of the SUBSTACNE
Discussion
14.

The average temperature in Udhagamandalam (Ooty) is 74^@F What is the temperature in the Celsius scale? What will be the temperature in K?

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Solution :The TEMPERATURE in the CELSIUS scale is
`""^@C = 5/9 (F-32)`
`= 5/9 (74 - 32)`
`=(5 xx 42)//9 = 23.3^@C`
In Kelvin scale , the temperature will be,
`K= 273 + ""^@C = 273 + 23.3 = 296.3 K`
Discussion
15.

{:(,"Column A",,, "Column B"),(A., "Sound", ( ), a., "Percussion instrument"),(B., "Depth of ocean bed", ( ), b., "Sound needs a medium"),(C., "Maximum displacement", ( ), c., "SONAR"),(D., "Tabla", ( ), d., "Amplitude"),(E., "Bell jar experiment", ( ), e., "Vibrating body"):}

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Answer :A : EB : CC : dD : aE : b
Discussion
16.

Find the relationship between the time period of the pendulum and the length of the pendulum.

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Discussion
17.

Which among the folloeing is the unit of energy?

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JOULE
watt
newton
All the above

Solution :Joule is a UNIT of ENERGY
Discussion
18.

Arrange the following steps in a sequential order to measure the specific heat capacity of a substance using a calorimeter (a) measur the common temperature of the mixture in calorimeterand calculate the fall in temprature of hot substance and rise in temperature of the water and the calorimeter (c ) calculate heat gained by the water and the calorimeterltbvrgt (d) Take a hot substance measure its mass and temprature and mix it with the water in calorimeter (e ) Take some water in a calorimeter measure the mass of water mass of heat calorimeter and temperature of water and the calorimeter

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Discussion
19.

Eclipses are formed due to recitinear propagation of light.

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SOLUTION :Eclipses (SHADOWS) are formed DUE to RECTILINEAR propagation of light.
Discussion
20.

One foot candle= ______ lux.

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`12.56`
`10.76`
700
None of these

Solution :ONE FOOT CANDLE =10.76 LUX
Discussion
21.

A concave mirror has radius of curvature of 30 cm. Find its focal length

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Solution :Focal LENGTH, `f=("Radius of curvature")/(2)`
`=(30)/(2)CM`
f=15cm
Discussion
22.

Answer the following question Two iron speres of equal mass having temperature 20^(@)C and 48^(@)C are brought in to contact with each other. What is the equilibrium temperature ? Assume there is no heat loss surrounding.

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Discussion
23.

"_____" is a safety device that prevents excess flow of current through an appliance.

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SOLUTION :Fuse is a safety device that prevents EXCESS FLOW of current THROUGHAN appliance.
Discussion
24.

Water is a________ conductor of heat

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SOLUTION :WATER is a BAD CONDUCTOR of HEAT
Discussion
25.

The unit of frequency is second.

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SOLUTION :The unit of FREQUENCY is cycles PER SECOND (or) Hertz
Discussion
26.

A plane mirror..... reflect 100 percent light falling on it.

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SOLUTION :does not
Discussion
27.

After reflection, the light rays from a point object at the focus of a concave mirror,

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emerge PERPENDICULAR to the PRINCIPAL axis.
emerge parallel to the principal axis.
form REAL image.
Both (b) and (c)

Solution :When light rays PASS through the focus of a concave mirror, the reflected rays emerge parallel to the principal axis.
Discussion
28.

Express 100 W in candlepower.

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Solution :Power of the BULD =100 W
1 W 683 lumen and 1 lumen =12.56 candle power.
`:.100W=100xx638` lumen
`=100xx638xx12.56` candle power
`:.` The intensity of bulb is 8,57,848 timses more than the brightness (intensity) of a candle.
Discussion
29.

A body projected upwards from the top of a builing is an example of ______

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UNIFORM motion
non-uniform motion
PERIODIC motion
oscillatory motion

Solution :A BODY projected UPWARDS from the top of a building is an example of a non - uniform motion.
Discussion
30.

The angle of incident of a light rays incidents on the surface of a plane mirror is 30^(@). The angle of deviation is

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`120^(@)`
`30^(@)`
`60^(@)`
`90^(@)`

SOLUTION :The ANGLE of DEVIATION `=180-2i=180-2xx30=120^(@)`
Discussion
31.

1 hectare=____m^(2)

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`10^(2)`
`10^(3)`
`10^(4)`
`10^(5)`

SOLUTION :1 hectare=10000`m^(2)=10^(4)m^(2)`
Discussion
32.

A ray of light after reflection from a mirror is known as

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REFLECTED ray
normal
incident ray
refracted ray

Answer :A
Discussion
33.

Assertion (A) : The pitch of the sound produced by the vibrating string can be changed. Reason (R) : The pitch of the sound can be changed by changing the length, tension and thickness of the vibrating string.

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Both A and R are correct and R is the correct EXPLANATION of A.
Both A and R are correct but R is not the correct explanation of A.
A is correct and R is incorrect.
Both A and R are incorrect.

Solution :The pitch of the sound produced by a vibrating string can be CHANGED by changing the LENGTH, tension and thickness of the vibrating string. So, R is the correct explanation or reason for A.
Discussion
34.

Which of the following tools are useful in cutting a smal piece of metal?

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Vice
Hack-saw
Screwdirver
Both (a) and (B)

ANSWER :D
Discussion
35.

In household connnections, no current passes through neutral wire when the switch is off.

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SOLUTION :A SWITCH is ALWAYS connected to a liv wire. When it is 'off' no current passes through a NEUTRAL wire.
Discussion
36.

The use of the handle of theplough, when the farmer uses onhis field is __________

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to control the DIRECTION of PLOUGH
to control the direction of bulls
to control the depth of the soil ploughed
Both (a) and (c)

SOLUTION :The farmer controls the direction of the plough, depth of the soil ploughed by measn of the HANDLE attahed to the plough
Discussion
37.

Answer the following question Define calorific value of a fuel

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Discussion
38.

1 hectare = ...... m^(2).

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`10^(2)`
`10^(3)`
`10^(4)`
`10^(5)`

Solution :1 hectare=10000`m^(2)=10^(4)m^(2)`
Discussion
39.

Which of the following tools cannot be fixed in the collet of a multipurpose tool?

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file
poker
a SCREW driver
Hammer

Answer :D
Discussion
40.

The to and fro motion of an object is called vibration.

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SOLUTION :To and fro MOTION of an object is CALLED VIBRATION.
Discussion
41.

What are uniform speed and non- unifromm speed ? Explain , with suitable examples.

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Discussion
42.

The path of light entering into the eye .

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intensity
COLOUR of LIGHT
speed
None of these

Solution :The difference in the brightness of OBJECT is DUE to the difference in the intensity of light.
Discussion
43.

Identify the correct statement/s related to polarization in voltraic cell. (a) When current passes through the voltaic cell, zinc plate starts dissolvingin the acid and pro-duces hydrogen bubbles. (b) These hydrogen bubbles accumulate on the cop-per plate and develop resistance to the flow of current.

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Only (A) is true.
Only (B) is true.
Both (A) and (B) true.
Both (A) and (B) are false.

Solution :When CURRENT passesthrough the VOLTAIC cell, zic plate starts dissolving in the acid and products hydro-gen BUBBLES and these hydrogen bubbles ACCUMULATE on the copper plate and develop RESISTANCE to the flow of current.
Discussion
44.

We observe the bulb glowing when the switch is 'ON'. Can we conculde that charges instantly move from the 'switch' to the bulb ? Discuss.

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Solution :In any electric CIRCUIT, wires made upof good con-ductors are used to connected different appliances. All conductorshave free charges MOVING in al DIRECTIONS. When the switch is 'ON', free charges through-out the circuit start moving in a spcific direction INSTANTLY. Even through nocharge moves from switch to bulb instantly, charges at the end of the conductor that are connected to the bulb star moving through the bulb when switch is 'ON'.
Discussion
45.

The temperatures of two bodies differ by 10^@Con the Celsius scale. How much will they differ on theKelvin scale ?

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Solution : 100 divisions on Celsius SCALE = 100 divisions on KELVIN scale
10 divisions on Celsius scale = 10 divisions on Kelvin scale
Hence the temperature of TWO bodies will DIFFER by 10 K on the Kelvin scale.
Discussion
46.

A current carrying conductor can produce which of the following?

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only HEAT
only MEGNETIC field
Both heat and MAGNETIC field
None of the above

Answer :C
Discussion
47.

When we see an object the image formed on the retina is

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ANSWER :VIRTUAL and ERECT
Discussion
48.

Like poles............. each other and unlike poles ...........

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SOLUTION :REPEL, ATTRACT
Discussion
49.

The porous pot in Leclanche cell contains "_____" with a carbon rod dipped in it.

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Solution :The POROUS pot in Leclanche CELL contains powdered CARBON and manganese DIOXIDE with a carbon rod rippedin it.
Discussion
50.

The angle between the direction of applied forces and the main plough (or blade of plough), in a wooden plough is __________

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greater than `90^(@)`
`90^(@)`
`60^(@)`
less than `90^(@)`

Solution :From the adjacent FIGURE, it is clear that the angle is less than `90^(@)`.if the angle is `90^(@)`, then it is DIFFICULT to pull the plough, andhence the angle is always ACUTE.
Discussion