13232 + Interview Questions in Physics Page 27 InterviewSolution

1301.	63.A stone is projected from the ground with a velocity of 14m/s one second later it clears a wall 2m high. The angle of projection is (g=10m/s2)
Answer» 63.A stone is projected from the ground with a velocity of 14m/s one second later it clears a wall 2m high. The angle of projection is (g=10m/s2)

Discussion

1302.	What is a bulb horn ? Name the principle on which a bulb horn works.
Answer» What is a bulb horn ? Name the principle on which a bulb horn works.

Discussion

1303.	'धर्म का रहस्य जानना सिर्फ़ धर्माचार्यों का काम नहीं, कोई भी व्यक्ति अपने स्तर पर उस रहस्य को जानने की कोशिश कर सकता है, अपनी राय दे सकता है'- टिप्पणी कीजिए।
Answer» 'धर्म का रहस्य जानना सिर्फ़ धर्माचार्यों का काम नहीं, कोई भी व्यक्ति अपने स्तर पर उस रहस्य को जानने की कोशिश कर सकता है, अपनी राय दे सकता है'- टिप्पणी कीजिए।

Discussion

1304.	Which of the following is true about displacement?
Answer» Which of the following is true about displacement?

Discussion

1305.	if the force inside the earth surface varies as r^n where r is the dis†an ce of body from the centre of earth then the value of n will be
Answer» if the force inside the earth surface varies as r^n where r is the dis†an ce of body from the centre of earth then the value of n will be

Discussion

1306.	△ H=△ U+△(pv) how do exapandit when both pressure andvolumd are changing
Answer» △ H=△ U+△(pv) how do exapandit when both pressure andvolumd are changing

Discussion

1307.	Three particles A B And C of a system are in reat initially then they start to mve due mutual interactions, momentum of particle A and B are (2i + 3j) and (-4j + k) m/s respectively then the magnitude of momentum of particle C is
Answer» Three particles A B And C of a system are in reat initially then they start to mve due mutual interactions, momentum of particle A and B are (2i + 3j) and (-4j + k) m/s respectively then the magnitude of momentum of particle C is

Discussion

1308.	Answer the following.(1) Suppose you and your friend are on the moon. Will you be able to hear any sound produced by your friend? Give reasons.(2) Why can we not hear echo produced in our classroom?(3) Why are ceilings of concert halls, cinema halls curved?(4) Which type of waves are sound waves? State their characteristics.(5) Explain auditory aspects of human ear.
Answer» Answer the following. (1) Suppose you and your friend are on the moon. Will you be able to hear any sound produced by your friend? Give reasons. (2) Why can we not hear echo produced in our classroom? (3) Why are ceilings of concert halls, cinema halls curved? (4) Which type of waves are sound waves? State their characteristics. (5) Explain auditory aspects of human ear.

1308.

Answer the following.(1) Suppose you and your friend are on the moon. Will you be able to hear any sound produced by your friend? Give reasons.(2) Why can we not hear echo produced in our classroom?(3) Why are ceilings of concert halls, cinema halls curved?(4) Which type of waves are sound waves? State their characteristics.(5) Explain auditory aspects of human ear.

Answer»

Answer the following.

(1) Suppose you and your friend are on the moon. Will you be able to hear any sound produced by your friend? Give reasons.

(2) Why can we not hear echo produced in our classroom?

(3) Why are ceilings of concert halls, cinema halls curved?

(4) Which type of waves are sound waves? State their characteristics.

(5) Explain auditory aspects of human ear.

Discussion

1309.	A man in the lift weighs more, when the lift
Answer» A man in the lift weighs more, when the lift

Discussion

1310.	For work to be done, energy must be
Answer» For work to be done, energy must be

Discussion

1311.	Find the resistance of a hollow cylinder of inner radius a and outer radius b whose inner and outer cylindrical surfaces are connected by to a p.d (ρ resistivity)
Answer» Find the resistance of a hollow cylinder of inner radius a and outer radius b whose inner and outer cylindrical surfaces are connected by to a p.d ( $ρ$ resistivity)

Discussion

1312.	A battery of e.m.f. 10 V is connected to resistances as shown in figure. The potential difference VA–VB between the points A and B is
Answer» A battery of e.m.f. $10 V$ is connected to resistances as shown in figure. The potential difference $V_{A} - V_{B}$ between the points $A$ and $B$ is

Discussion

1313.	Forces of interaction between two co-axial short electric dipoles whose centres are R distance apart varies as _____________
Answer» Forces of interaction between two co-axial short electric dipoles whose centres are R distance apart varies as _____________

Discussion

1314.	What is the physical quantity that always remains constant in projectile motion
Answer» What is the physical quantity that always remains constant in projectile motion

Discussion

1315.	An object is placed at a distance of 10 cmfrom a concave mirror of radius of curvature 0.6 m. Which of the following statement is incorrect?
Answer» An object is placed at a distance of 10 $c m$ from a concave mirror of radius of curvature 0.6 $m$ . Which of the following statement is incorrect?

Discussion

1316.	Fill in the blanks:(a) The hotness of an object is determined by its ____.(b) Temperature of boiling water cannot be measured by a ____ thermometer.(c) Temperature is measured in degree ____.(d) No medium is required for transfer of heat by the process of ____.(e) A cold steel spoon is dipped in a cup of hot milk. Heat is transferred to its other end by the process of ____.(f) Clothes of ____ colours absorb more heat better than clothes of light colours.
Answer» Fill in the blanks: (a) The hotness of an object is determined by its ____. (b) Temperature of boiling water cannot be measured by a ____ thermometer. (c) Temperature is measured in degree ____. (d) No medium is required for transfer of heat by the process of ____. (e) A cold steel spoon is dipped in a cup of hot milk. Heat is transferred to its other end by the process of ____. (f) Clothes of ____ colours absorb more heat better than clothes of light colours.

1316.

Fill in the blanks:(a) The hotness of an object is determined by its .(b) Temperature of boiling water cannot be measured by a thermometer.(c) Temperature is measured in degree .(d) No medium is required for transfer of heat by the process of .(e) A cold steel spoon is dipped in a cup of hot milk. Heat is transferred to its other end by the process of .(f) Clothes of colours absorb more heat better than clothes of light colours.

Answer»

Fill in the blanks:

(a) The hotness of an object is determined by its ____.

(b) Temperature of boiling water cannot be measured by a ____ thermometer.

(c) Temperature is measured in degree ____.

(d) No medium is required for transfer of heat by the process of ____.

(e) A cold steel spoon is dipped in a cup of hot milk. Heat is transferred to its other end by the process of ____.

(f) Clothes of ____ colours absorb more heat better than clothes of light colours.

Discussion

1317.	The effective width of a reinforced concrete T-beam flange under compression, according to IS: 456-1978, given l0 is the distance between the adjacent zero moment points, b is the breadth of the rib and D is the thickness of the flange, is
Answer» The effective width of a reinforced concrete T-beam flange under compression, according to IS: 456-1978, given $l_{0}$ is the distance between the adjacent zero moment points, b is the breadth of the rib and D is the thickness of the flange, is

Discussion

1318.	A person listening to a tone of 500 Hz sitting at a distance of 450 m from the source of the sound. What is the time interval between successive compressions from the source?
Answer» A person listening to a tone of 500 Hz sitting at a distance of 450 m from the source of the sound. What is the time interval between successive compressions from the source?

Discussion

1319.	Two satellites of mass m are revolving around earth of mass M in the same orbit of radius r. Rotational directions of the two are opposite therefore , they can collide. Total mechanical energy of the system(both satellites and the earth) is (m
Answer» Two satellites of mass m are revolving around earth of mass M in the same orbit of radius r. Rotational directions of the two are opposite therefore , they can collide. Total mechanical energy of the system(both satellites and the earth) is (m<

Discussion

1320.	If q=2t2+3, find current at t=2 s.
Answer» If $q = 2 t^{2} + 3$ , find current at $t = 2 s$ .

Discussion

1321.	The time period of a sound wave travelling in a medium is T. At a given instant t=0, a particular region in a medium has minimum density. The density of this region will be minimum again at
Answer» The time period of a sound wave travelling in a medium is $T$ . At a given instant $t = 0$ , a particular region in a medium has minimum density. The density of this region will be minimum again at

Discussion

1322.	Q 14/15 If the length of second's hand in a clock is 1m, then change in velocity of its tip is 15 s is
Answer» Q 14/15 If the length of second's hand in a clock is 1m, then change in velocity of its tip is 15 s is

Discussion

1323.	Calculate the time taken by the sound wave to travel 1.5 km when the frequency and wavelength are 2000 Hz and 0.35 m respectively.
Answer» Calculate the time taken by the sound wave to travel 1.5 km when the frequency and wavelength are 2000 Hz and 0.35 m respectively.

Discussion

1324.	6. Path of particle projected from the ground isgiven by y ax - bx2, then maximum heightattained by particle (y-axis is vertically upward) isa24a2(1) 2+b2(2)4\lbrack a2 + b2\rbrack a2(3) 4b4a2(4)b
Answer» 6. Path of particle projected from the ground isgiven by y ax - bx2, then maximum heightattained by particle (y-axis is vertically upward) isa24a2(1) 2+b2(2)4\lbrack a2 + b2\rbrack a2(3) 4b4a2(4)b

Discussion

1325.	Dedsec text and body with acceleration of 9.8 M per second square so when the object is falling then does the gravitational force between them helps think its velocity
Answer» Dedsec text and body with acceleration of 9.8 M per second square so when the object is falling then does the gravitational force between them helps think its velocity

Discussion

1326.	Why water droplets are spherical
Answer» Why water droplets are spherical

Discussion

1327.	if force F,velocity V,and time T are taken as fundamental units,then the dimention of mass are
Answer» if force F,velocity V,and time T are taken as fundamental units,then the dimention of mass are

Discussion

1328.	Which of the following involves Newton's second law of motion?
Answer» Which of the following involves Newton's second law of motion?

Discussion

1329.	One day the meter reading is found to be 7643 units while the next day, it was 7657 units. What is the consumption of electricity in a day?
Answer» One day the meter reading is found to be 7643 units while the next day, it was 7657 units. What is the consumption of electricity in a day?

Discussion

1330.	46.A body is PROJECTED horizontally with a velocity 4m/s from the top of a high tower.The angle at which it will strike the ground is?(take g=10m/s)
Answer» 46.A body is PROJECTED horizontally with a velocity 4m/s from the top of a high tower.The angle at which it will strike the ground is?(take g=10m/s)

Discussion

1331.	A wooden cylinder floats in water, with 35% of its volume above water. What is the density of wooden cylinder in SI system?
Answer» A wooden cylinder floats in water, with 35% of its volume above water. What is the density of wooden cylinder in SI system?

Discussion

1332.	Why two stones do not come closer, even if there is gravitational force of attraction between them ?
Answer» Why two stones do not come closer, even if there is gravitational force of attraction between them ?

Discussion

1333.	A bike moving along straight road cover 35 m in the 4th second and 40 m in the 5th second. What is its initial velocity and acceleration (if the acceleration is assumed to be uniform)?
Answer» A bike moving along straight road cover $35 m$ in the $4^{th} second$ and $40 m$ in the $5^{th} second$ . What is its initial velocity and acceleration (if the acceleration is assumed to be uniform)?

Discussion

1334.	An object of mass 1 kg travelling in a straight line with a velocity of 10 ms−1 collides with, and sticks to, a stationary wooden block of mass 5 kg. Then they both move off together in the same straight line. Calculate the total momentum just before the impact and just after the impact. Also, calculate the velocity of the combined object.
Answer» An object of mass 1 kg travelling in a straight line with a velocity of $10 m s^{- 1}$ collides with, and sticks to, a stationary wooden block of mass 5 kg. Then they both move off together in the same straight line. Calculate the total momentum just before the impact and just after the impact. Also, calculate the velocity of the combined object.

Discussion

1335.	Two inductors L1 (Inductance 1 mH, internal resistance 2 Ω) and L2 (inductance 2 mH, internal resistance 4 Ω) and a resistor R (resistance12 Ω) are all connected in parallel across a 5 V battery. The circuit is switched on at time t=0. The ratio of the maximum to the minimum current (Imax/Imin) drawn from the battery is
Answer» Two inductors $L_{1}$ $(Inductance 1 mH, internal resistance 2 Ω)$ and $L_{2}$ $(inductance 2 mH, internal resistance 4 Ω)$ and a resistor $R$ $(resistance 12 Ω)$ are all connected in parallel across a $5 V$ battery. The circuit is switched on at time $t = 0$ . The ratio of the maximum to the minimum current $(I_{max} / I_{min})$ drawn from the battery is

Discussion

1336.	When an object is fully submerged in strong salty water, it undergoes an apparent :(1) loss in mass(2) loss in volume(3) loss in density(4) loss in weight
Answer» When an object is fully submerged in strong salty water, it undergoes an apparent : (1) loss in mass (2) loss in volume (3) loss in density (4) loss in weight

Discussion

1337.	Purchasing 1 kilogram of sugar will be profitable at
Answer» Purchasing 1 kilogram of sugar will be profitable at

Discussion

1338.	A pendulum makes 135 oscillations in a duration of 15 seconds. What is the time period of the pendulum?
Answer» A pendulum makes 135 oscillations in a duration of 15 seconds. What is the time period of the pendulum?

Discussion

1339.	If the apple is attracted by the earths gravitation force then why isn't the earth attracted towards the apple? Mentioned earlier that every object in the universe attracts every other object in universe? Is it because the force of the apple is negligible?
Answer» If the apple is attracted by the earths gravitation force then why isn't the earth attracted towards the apple? Mentioned earlier that every object in the universe attracts every other object in universe? Is it because the force of the apple is negligible?

Discussion

1340.	“If you work hard and know where you’re going, you’ll get there,” says Evelyn Glennie.You have now read about two musicians, Evelyn Glennie and Ustad Bismillah Khan. Do you think that they both worked hard? Where did they want to ‘go’? Answer these questions in two paragraphs, one on each of the two musicians.
Answer» “If you work hard and know where you’re going, you’ll get there,” says Evelyn Glennie. You have now read about two musicians, Evelyn Glennie and Ustad Bismillah Khan. Do you think that they both worked hard? Where did they want to ‘go’? Answer these questions in two paragraphs, one on each of the two musicians.

1340.

“If you work hard and know where you’re going, you’ll get there,” says Evelyn Glennie.You have now read about two musicians, Evelyn Glennie and Ustad Bismillah Khan. Do you think that they both worked hard? Where did they want to ‘go’? Answer these questions in two paragraphs, one on each of the two musicians.

Answer»

“If you work hard and know where you’re going, you’ll get there,” says Evelyn Glennie.

You have now read about two musicians, Evelyn Glennie and Ustad Bismillah Khan. Do you think that they both worked hard? Where did they want to ‘go’? Answer these questions in two paragraphs, one on each of the two musicians.

Discussion

1341.	why temperature remains onstant during inter convertion of state
Answer» why temperature remains onstant during inter convertion of state

Discussion

1342.	A boy stands at a distance x m from a cliff and shouts loudly. The echo is heard 4 s later. The boy then walks a distance of 80 m away from the cliff and shouts again. This time the echo is heard 4.5 s later. The speed of the sound in air is-(1)310 m/s (2)320 m/s (3)330 m/s (4)Data Insufficient
Answer» A boy stands at a distance x m from a cliff and shouts loudly. The echo is heard 4 s later. The boy then walks a distance of 80 m away from the cliff and shouts again. This time the echo is heard 4.5 s later. The speed of the sound in air is-(1)310 m/s (2)320 m/s (3)330 m/s (4)Data Insufficient

Discussion

1343.	Name the physical quantities related to the following units : (a) km2 (b) newton (c) joule (d) pascal (e) watt
Answer» Name the physical quantities related to the following units : (a) $k m^{2}$ (b) newton (c) joule (d) pascal (e) watt

1343.

Name the physical quantities related to the following units : (a) km2 (b) newton (c) joule (d) pascal (e) watt

Answer»

Name the physical quantities related to the following units :

(a) $k m^{2}$ (b) newton (c) joule

(d) pascal (e) watt

Discussion

1344.	There are three sources of sound of equal intensity with frequency 200Hz,201Hz and 202Hz respectively, if all sounded simultaneously then beat frequency heard by listener?
Answer» There are three sources of sound of equal intensity with frequency 200Hz,201Hz and 202Hz respectively, if all sounded simultaneously then beat frequency heard by listener?

Discussion

1345.	State two units of mass bigger than a kilogram. Give their relationship with the kilogram.
Answer» State two units of mass bigger than a kilogram. Give their relationship with the kilogram.

Discussion

1346.	The line joining the places where the magnetic needle becomes horizontal is called___.
Answer» The line joining the places where the magnetic needle becomes horizontal is called___.

Discussion

1347.	A spinning solid spherical ball having angular velocity is projected on a horizontal rough surface with velocity v0/2r. The velocity of centre of mass of the ball when slipping ceases, will be
Answer» A spinning solid spherical ball having angular velocity is projected on a horizontal rough surface with velocity v0/2r. The velocity of centre of mass of the ball when slipping ceases, will be

Discussion

1348.	ntP (momentum ) increases by 50% . The change in K.E is 125%. If p increase by 100% then the chance in KE should become 250% (125 +125 i.e just double ) but it is 300% why is it so?? n
Answer» ntP (momentum ) increases by 50% . The change in K.E is 125%. If p increase by 100% then the chance in KE should become 250% (125 +125 i.e just double ) but it is 300% why is it so?? n

Discussion

1349.	a particle executes SHM with period of 4s. find minimum time interval in which the velocity of particle changes by an amount equal to its maximum velocity ?
Answer» a particle executes SHM with period of 4s. find minimum time interval in which the velocity of particle changes by an amount equal to its maximum velocity ?

Discussion

1350.	Two spheres have radii 10 cm & 20 cm. One of the sphere is given 150 microcoulomb charge and connected by a wire. Their common potential will be-(1) 9 × 10^6 volts (2) 4.5 × 10^6 volts (3) 1.8 × 10^6 volts (4) 1.35 × 10^9 volts
Answer» Two spheres have radii 10 cm & 20 cm. One of the sphere is given 150 microcoulomb charge and connected by a wire. Their common potential will be- (1) 9 × 10^6 volts (2) 4.5 × 10^6 volts (3) 1.8 × 10^6 volts (4) 1.35 × 10^9 volts

Discussion

Explore topic-wise InterviewSolutions in .

63.A stone is projected from the ground with a velocity of 14m/s one second later it clears a wall 2m high. The angle of projection is (g=10m/s2)

What is a bulb horn ? Name the principle on which a bulb horn works.

Which of the following is true about displacement?

if the force inside the earth surface varies as r^n where r is the dis†an ce of body from the centre of earth then the value of n will be

△ H=△ U+△(pv) how do exapandit when both pressure andvolumd are changing

Three particles A B And C of a system are in reat initially then they start to mve due mutual interactions, momentum of particle A and B are (2i + 3j) and (-4j + k) m/s respectively then the magnitude of momentum of particle C is

A man in the lift weighs more, when the lift

For work to be done, energy must be

Find the resistance of a hollow cylinder of inner radius a and outer radius b whose inner and outer cylindrical surfaces are connected by to a p.d (ρ resistivity)

A battery of e.m.f. 10 V is connected to resistances as shown in figure. The potential difference VA–VB between the points A and B is

Forces of interaction between two co-axial short electric dipoles whose centres are R distance apart varies as _____________

What is the physical quantity that always remains constant in projectile motion

An object is placed at a distance of 10 cmfrom a concave mirror of radius of curvature 0.6 m. Which of the following statement is incorrect?

The effective width of a reinforced concrete T-beam flange under compression, according to IS: 456-1978, given l0 is the distance between the adjacent zero moment points, b is the breadth of the rib and D is the thickness of the flange, is

A person listening to a tone of 500 Hz sitting at a distance of 450 m from the source of the sound. What is the time interval between successive compressions from the source?

Two satellites of mass m are revolving around earth of mass M in the same orbit of radius r. Rotational directions of the two are opposite therefore , they can collide. Total mechanical energy of the system(both satellites and the earth) is (m

If q=2t2+3, find current at t=2 s.

The time period of a sound wave travelling in a medium is T. At a given instant t=0, a particular region in a medium has minimum density. The density of this region will be minimum again at

Q 14/15 If the length of second's hand in a clock is 1m, then change in velocity of its tip is 15 s is

Calculate the time taken by the sound wave to travel 1.5 km when the frequency and wavelength are 2000 Hz and 0.35 m respectively.

6. Path of particle projected from the ground isgiven by y ax - bx2, then maximum heightattained by particle (y-axis is vertically upward) isa24a2(1) 2+b2(2)4\lbrack a2 + b2\rbrack a2(3) 4b4a2(4)b

Dedsec text and body with acceleration of 9.8 M per second square so when the object is falling then does the gravitational force between them helps think its velocity

Why water droplets are spherical

if force F,velocity V,and time T are taken as fundamental units,then the dimention of mass are

Which of the following involves Newton's second law of motion?

One day the meter reading is found to be 7643 units while the next day, it was 7657 units. What is the consumption of electricity in a day?

46.A body is PROJECTED horizontally with a velocity 4m/s from the top of a high tower.The angle at which it will strike the ground is?(take g=10m/s)

A wooden cylinder floats in water, with 35% of its volume above water. What is the density of wooden cylinder in SI system?

Why two stones do not come closer, even if there is gravitational force of attraction between them ?

A bike moving along straight road cover 35 m in the 4th second and 40 m in the 5th second. What is its initial velocity and acceleration (if the acceleration is assumed to be uniform)?

When an object is fully submerged in strong salty water, it undergoes an apparent :(1) loss in mass(2) loss in volume(3) loss in density(4) loss in weight

Purchasing 1 kilogram of sugar will be profitable at

A pendulum makes 135 oscillations in a duration of 15 seconds. What is the time period of the pendulum?

If the apple is attracted by the earths gravitation force then why isn't the earth attracted towards the apple? Mentioned earlier that every object in the universe attracts every other object in universe? Is it because the force of the apple is negligible?

why temperature remains onstant during inter convertion of state

A boy stands at a distance x m from a cliff and shouts loudly. The echo is heard 4 s later. The boy then walks a distance of 80 m away from the cliff and shouts again. This time the echo is heard 4.5 s later. The speed of the sound in air is-(1)310 m/s (2)320 m/s (3)330 m/s (4)Data Insufficient

Name the physical quantities related to the following units : (a) km2 (b) newton (c) joule (d) pascal (e) watt

There are three sources of sound of equal intensity with frequency 200Hz,201Hz and 202Hz respectively, if all sounded simultaneously then beat frequency heard by listener?

State two units of mass bigger than a kilogram. Give their relationship with the kilogram.

The line joining the places where the magnetic needle becomes horizontal is called___.

A spinning solid spherical ball having angular velocity is projected on a horizontal rough surface with velocity v0/2r. The velocity of centre of mass of the ball when slipping ceases, will be

ntP (momentum ) increases by 50% . The change in K.E is 125%. If p increase by 100% then the chance in KE should become 250% (125 +125 i.e just double ) but it is 300% why is it so?? n

a particle executes SHM with period of 4s. find minimum time interval in which the velocity of particle changes by an amount equal to its maximum velocity ?

Two spheres have radii 10 cm & 20 cm. One of the sphere is given 150 microcoulomb charge and connected by a wire. Their common potential will be-(1) 9 × 10^6 volts (2) 4.5 × 10^6 volts (3) 1.8 × 10^6 volts (4) 1.35 × 10^9 volts