13232 + Interview Questions in Physics Page 3 InterviewSolution

101.	The frog feeding on an insect is:
Answer» The frog feeding on an insect is:

101.

The frog feeding on an insect is:

Answer»

The frog feeding on an insect is:

102.	19. A square loop of one turn,each of length is l having current i is given below.find magnetic dipole moment of this loop.
Answer» 19. A square loop of one turn,each of length is l having current i is given below.find magnetic dipole moment of this loop.

Discussion

103.	If the Average life of a person is taken as 100 s, the age of universe on this scale is of the order?
Answer» If the Average life of a person is taken as 100 s, the age of universe on this scale is of the order?

Discussion

104.	The tension (T) in the string is (Assume pulley and strings are light and smooth. Take g as acceleration due to gravity)
Answer» The tension (T) in the string is (Assume pulley and strings are light and smooth. Take g as acceleration due to gravity)

Discussion

105.	Average KE of a particle of mass m performing SHM of amplitude x0 and angular frequency ω in one complete oscillation with respect to position, is:
Answer» Average KE of a particle of mass $m$ performing SHM of amplitude $x_{0}$ and angular frequency $ω$ in one complete oscillation with respect to position, is:

Discussion

106.	Mention five differences between an electromagnet and permanent magnet.
Answer» Mention five differences between an electromagnet and permanent magnet.

Discussion

107.	A progressive wave having frequency 500Hz has a velocity of 360m/s . Find Distance between two nearest points which are 120 degrees out of phase.
Answer» A progressive wave having frequency 500Hz has a velocity of 360m/s . Find Distance between two nearest points which are 120 degrees out of phase.

Discussion

108.	How angular velocity is equal to 2π/T
Answer» How angular velocity is equal to 2π/T

Discussion

109.	Area under velocity-time graph gives:
Answer» Area under velocity-time graph gives:

Discussion

110.	The relation between position (x) and time (t) are given below for a particle moving along a straightline. Which of the following equation represents uniformly accelerated motion? \lbrack where α and β are positive constants\rbrack (1)β x=α t+αβ (2)α x=β+t (3) xt=αβ (4)α t=\sqrt{β+
Answer» The relation between position (x) and time (t) are given below for a particle moving along a straightline. Which of the following equation represents uniformly accelerated motion? \lbrack where α and β are positive constants\rbrack (1)β x=α t+αβ (2)α x=β+t (3) xt=αβ (4)α t=\sqrt{β+

Discussion

111.	ntThree charges +4q, Q and q are placed in a straight line of length l at points 0, l/2and l distance away from one end respectively. What should be Q in order to make the net force on q to be zero?n
Answer» ntThree charges +4q, Q and q are placed in a straight line of length l at points 0, l/2and l distance away from one end respectively. What should be Q in order to make the net force on q to be zero?n

Discussion

112.	Question 15 A car starts from rest and moves along the x-axis with constant acceleration 5 ms−2 for 8 seconds. If it then continues with constant velocity, what distance will the car cover in 12 seconds since it started from the rest?
Answer» Question 15 A car starts from rest and moves along the x-axis with constant acceleration $5 m s^{- 2}$ for 8 seconds. If it then continues with constant velocity, what distance will the car cover in 12 seconds since it started from the rest?

Discussion

113.	Two stones are thrown with same speed u at differentangles from ground in air. If both stones have samerange and height attained by them are h1and h2then h1 + h2 is equal to
Answer» Two stones are thrown with same speed u at differentangles from ground in air. If both stones have samerange and height attained by them are h1and h2then h1 + h2 is equal to

Discussion

114.	Three masses 5 kg, 2 kg and 7 kg are aligned in a straight line as shown below. Find the net gravitational force on 4 kg?
Answer» Three masses 5 kg, 2 kg and 7 kg are aligned in a straight line as shown below. Find the net gravitational force on 4 kg?

114.

Three masses 5 kg, 2 kg and 7 kg are aligned in a straight line as shown below. Find the net gravitational force on 4 kg?

Answer»

Three masses 5 kg, 2 kg and 7 kg are aligned in a straight line as shown below. Find the net gravitational force on 4 kg?

Discussion

115.	if velocity is zero then acceleration is constant.explain
Answer» if velocity is zero then acceleration is constant.explain

Discussion

116.	The diameter of a metallic ball is 4.2 cm. What is the mass of the ball, if the density of the metal is 8.9 g per cm3?
Answer» The diameter of a metallic ball is 4.2 cm. What is the mass of the ball, if the density of the metal is 8.9 g per cm³?

Discussion

117.	What's magnitude and vector laws??
Answer» What's magnitude and vector laws??

Discussion

118.	22.The pitch of a screw gauge is 1mm and there are 50 divisions on its cap. When nothing is put in between the studs , 44th division of circular scale coincides with reference line. When a glass plate is placed between the studs, the main scale reads three divisions and the circular scale reads 26 division. The
Answer» 22.The pitch of a screw gauge is 1mm and there are 50 divisions on its cap. When nothing is put in between the studs , 44th division of circular scale coincides with reference line. When a glass plate is placed between the studs, the main scale reads three divisions and the circular scale reads 26 division. The

Discussion

119.	Refractive index of diamond is 2.42 and that of carbon disulphide is 1.63. Calculate refractive index of diamond with respect to carbon disulphide.
Answer» Refractive index of diamond is 2.42 and that of carbon disulphide is 1.63. Calculate refractive index of diamond with respect to carbon disulphide.

Discussion

120.	A star having a mass __ times the solar mass, after passing through different stages becomes a supernova.
Answer» A star having a mass __ times the solar mass, after passing through different stages becomes a supernova.

Discussion

121.	Drops of liquid of density d are floating half immersed in a liquid of density ρ. If the surface tension of liquid is T, then radius of the drop will be
Answer» Drops of liquid of density $d$ are floating half immersed in a liquid of density $ρ$ . If the surface tension of liquid is $T$ , then radius of the drop will be

Discussion

122.	A particle is thrown vertically with a velocity of 50m/s. What time would it take to reach the height point? What would be its velocity at highest point? How high would the particle rise?
Answer» A particle is thrown vertically with a velocity of 50m/s. What time would it take to reach the height point? What would be its velocity at highest point? How high would the particle rise?

Discussion

123.	What is the amount of work to be done on a car of mass 1000 kg to increase its velocity from 10 km hr−1 to 20 km hr−1?
Answer» What is the amount of work to be done on a car of mass $1000 k g$ to increase its velocity from $10 k m h r^{- 1}$ to $20 k m h r^{- 1}$ ?

Discussion

124.	is S2 is he paramagnetic or diamagnetic
Answer» is S2 is he paramagnetic or diamagnetic

Discussion

125.	A motorcyclist drives from place A to B with a uniform speed of 30 km h−1 and returns from place B to A with a uniform speed of 20 km h−1. Find his average speed.
Answer» A motorcyclist drives from place A to B with a uniform speed of 30 km $h^{- 1}$ and returns from place B to A with a uniform speed of 20 km $h^{- 1}$ . Find his average speed.

Discussion

126.	A man moves to go 50 m due south, 40 m due west, and 20 m due north to reach a field. Find what is his displacement from his house to the field?
Answer» A man moves to go 50 m due south, 40 m due west, and 20 m due north to reach a field. Find what is his displacement from his house to the field?

Discussion

127.	The potential difference applied to an X -ray tube is 5 kV and the current through it is 3.2 mA. Then the number of the electrons striking the target per second is
Answer» The potential difference applied to an X -ray tube is 5 kV and the current through it is 3.2 mA. Then the number of the electrons striking the target per second is

Discussion

128.	A block of wood is floating on water with its dimensions 50 cm × 50 cm × 50 cm inside water. Calculate the buoyant force acting on the block. Take g = 9.8 N kg/1
Answer» A block of wood is floating on water with its dimensions 50 cm × 50 cm × 50 cm inside water. Calculate the buoyant force acting on the block. Take g = 9.8 N kg/1

Discussion

129.	A particle is projected with velocity u from a point on an inclined plane.iF v1 IS ITS VELOCITY ON STRIKING THE plane when the range up the plane is max. and v2 the velocity when the range down the plane is max. Relate these 3 vel.
Answer» A particle is projected with velocity u from a point on an inclined plane.iF v1 IS ITS VELOCITY ON STRIKING THE plane when the range up the plane is max. and v2 the velocity when the range down the plane is max. Relate these 3 vel.

Discussion

130.	what is realtionship between magnification and focal lengt
Answer» what is realtionship between magnification and focal lengt

Discussion

131.	If the loudness of a sound is reduced to 1 % then its amplitude will be
Answer» If the loudness of a sound is reduced to 1 % then its amplitude will be

Discussion

132.	Position of a particle varies as x=1/2t\ast t+1 , where x is in metres and t is in seconds, the average velocity of the body during t=0 to t=1s is what? (1) 2m/s (2) 1m/s (3) 1.5m/s (4) 0.5m/s
Answer» Position of a particle varies as x=1/2t\ast t+1 , where x is in metres and t is in seconds, the average velocity of the body during t=0 to t=1s is what? (1) 2m/s (2) 1m/s (3) 1.5m/s (4) 0.5m/s

Discussion

133.	derivation of pushing or pulling a roller is easier explain with hand written
Answer» derivation of pushing or pulling a roller is easier explain with hand written

Discussion

134.	What will be the average velocity of the minute hand of a clock between 5:00 PM to 6:00 PM if its length is given as 15 cm?
Answer» What will be the average velocity of the minute hand of a clock between 5:00 PM to 6:00 PM if its length is given as 15 cm?

Discussion

135.	Time period(T) is related to frequency(f) as
Answer» Time period(T) is related to frequency(f) as

Discussion

136.	37. A plane is moving horizontally with constant velocity ejects a package from it to an observer on groundthe package falls with a speed 10 m/s at an anglewith horizontal and to the pilot it seems vertical witha speed 8 m/s at the same instant. The actual speed of plane is(1) 36 m/s(2) 6 m/s(3) 3 m/s(4) 4 m/s
Answer» 37. A plane is moving horizontally with constant velocity ejects a package from it to an observer on groundthe package falls with a speed 10 m/s at an anglewith horizontal and to the pilot it seems vertical witha speed 8 m/s at the same instant. The actual speed of plane is(1) 36 m/s(2) 6 m/s(3) 3 m/s(4) 4 m/s

Discussion

137.	A piece of stone of mass 15.1 g is first immersed in a liquid and it weighs 10.9 gf. Then on immersing the piece of stone in water, it weighs 9.7 gf. Calculate : (a) the weight of the piece of stone in air, (b) the volume of the piece of stone, (c) the relative density of stone, (d) the relative density of the liquid.
Answer» A piece of stone of mass 15.1 g is first immersed in a liquid and it weighs 10.9 gf. Then on immersing the piece of stone in water, it weighs 9.7 gf. Calculate : (a) the weight of the piece of stone in air, (b) the volume of the piece of stone, (c) the relative density of stone, (d) the relative density of the liquid.

Discussion

138.	which type of collision take place in between photon and electron in photo electric effect
Answer» which type of collision take place in between photon and electron in photo electric effect

Discussion

139.	State two ways through which the strength of an electromagnet can be increased.
Answer» State two ways through which the strength of an electromagnet can be increased.

Discussion

140.	The mass of a planet is 6×1024 kg and its diameter is 12.8 ×103 km. If the value of a gravitational constant is 6.7 ×10-11 Nm2/kg2, calculate the value of acceleration due to gravity on the surface of the planet. What planet could this be?
Answer» The mass of a planet is 6 $\times$ 10²⁴ kg and its diameter is 12.8 $\times$ 10³ km. If the value of a gravitational constant is 6.7 $\times$ 10^$-$¹¹ Nm²/kg², calculate the value of acceleration due to gravity on the surface of the planet. What planet could this be?

Discussion

141.	33.The displacement-time graph for two particles A and B is as follows. The ratio VA/VB is
Answer» 33.The displacement-time graph for two particles A and B is as follows. The ratio VA/VB is

Discussion

142.	A particle of mass 2 m moving with velocity v strikes a stationary particles of mass 3 m and sticks to it. The speed of the system will be0.8 v0.2 v0.6 v0.4 v
Answer» A particle of mass 2 m moving with velocity v strikes a stationary particles of mass 3 m and sticks to it. The speed of the system will be 0.8 v 0.2 v 0.6 v 0.4 v

Discussion

143.	Assertion-all combustion reactions are exothermic reason-enthalpies of products are greater than enthalpies o reac†an ts
Answer» Assertion-all combustion reactions are exothermic reason-enthalpies of products are greater than enthalpies o reac†an ts

Discussion

144.	In a progressive longitudnal wave, the separation between a compression and immediate rarefaction is 2.4 m, if its speed is 360 m/s, the frequency is:
Answer» In a progressive longitudnal wave, the separation between a compression and immediate rarefaction is 2.4 m, if its speed is 360 m/s, the frequency is:

Discussion

145.	Question 5 (b)What is the physical state of water at— (b)0∘C
Answer» Question 5 (b) What is the physical state of water at— $(b) 0^{\circ} C$

Discussion

146.	Q. यूरोपीय संघ के संदर्भ में, निम्नलिखित कथनों पर विचार कीजिए। नीचे दिए गए कूटों का प्रयोग कर सही उत्तर का चयन कीजिए:
Answer» Q. यूरोपीय संघ के संदर्भ में, निम्नलिखित कथनों पर विचार कीजिए। नीचे दिए गए कूटों का प्रयोग कर सही उत्तर का चयन कीजिए:

146.

Q. यूरोपीय संघ के संदर्भ में, निम्नलिखित कथनों पर विचार कीजिए। नीचे दिए गए कूटों का प्रयोग कर सही उत्तर का चयन कीजिए:

Answer»

Q. यूरोपीय संघ के संदर्भ में, निम्नलिखित कथनों पर विचार कीजिए।

नीचे दिए गए कूटों का प्रयोग कर सही उत्तर का चयन कीजिए:

Discussion

147.	A shell is fired vertically upwards with a velocity v1 from a trolley moving horizontally with velocity v2. A person on the ground observed the motion of the shell as a parabola, whose horizontal range
Answer» A shell is fired vertically upwards with a velocity v1 from a trolley moving horizontally with velocity v2. A person on the ground observed the motion of the shell as a parabola, whose horizontal range

Discussion

148.	a particle execute SHM from the mean position. its amplitude is A, its time period is T. at what displacement, its speed is half of its maximum speed.a)root 3A/2b)root 2A/3c)2A/root 3d)3A/root 2
Answer» a particle execute SHM from the mean position. its amplitude is A, its time period is T. at what displacement, its speed is half of its maximum speed. a)root 3A/2 b)root 2A/3 c)2A/root 3 d)3A/root 2

Discussion

149.	If we drop three watermelons weighing 2 kg, 4 kg and 6 kg respectively from the same height and at the same time, which one of it will reach the ground first? (Given: negligible air resistance)
Answer» If we drop three watermelons weighing $2 kg$ , $4 kg$ and $6 kg$ respectively from the same height and at the same time, which one of it will reach the ground first? (Given: negligible air resistance)

Discussion

150.	Define upthrust and state its S.I. unit.
Answer» Define upthrust and state its S.I. unit.

Discussion

Explore topic-wise InterviewSolutions in .

The frog feeding on an insect is:

19. A square loop of one turn,each of length is l having current i is given below.find magnetic dipole moment of this loop.

If the Average life of a person is taken as 100 s, the age of universe on this scale is of the order?

The tension (T) in the string is (Assume pulley and strings are light and smooth. Take g as acceleration due to gravity)

Average KE of a particle of mass m performing SHM of amplitude x0 and angular frequency ω in one complete oscillation with respect to position, is:

Mention five differences between an electromagnet and permanent magnet.

A progressive wave having frequency 500Hz has a velocity of 360m/s . Find Distance between two nearest points which are 120 degrees out of phase.

How angular velocity is equal to 2π/T

Area under velocity-time graph gives:

The relation between position (x) and time (t) are given below for a particle moving along a straightline. Which of the following equation represents uniformly accelerated motion? \lbrack where α and β are positive constants\rbrack (1)β x=α t+αβ (2)α x=β+t (3) xt=αβ (4)α t=\sqrt{β+

ntThree charges +4q, Q and q are placed in a straight line of length l at points 0, l/2and l distance away from one end respectively. What should be Q in order to make the net force on q to be zero?n

Question 15 A car starts from rest and moves along the x-axis with constant acceleration 5 ms−2 for 8 seconds. If it then continues with constant velocity, what distance will the car cover in 12 seconds since it started from the rest?

Two stones are thrown with same speed u at differentangles from ground in air. If both stones have samerange and height attained by them are h1and h2then h1 + h2 is equal to

Three masses 5 kg, 2 kg and 7 kg are aligned in a straight line as shown below. Find the net gravitational force on 4 kg?

if velocity is zero then acceleration is constant.explain

The diameter of a metallic ball is 4.2 cm. What is the mass of the ball, if the density of the metal is 8.9 g per cm3?

What's magnitude and vector laws??

Refractive index of diamond is 2.42 and that of carbon disulphide is 1.63. Calculate refractive index of diamond with respect to carbon disulphide.

A star having a mass __ times the solar mass, after passing through different stages becomes a supernova.

Drops of liquid of density d are floating half immersed in a liquid of density ρ. If the surface tension of liquid is T, then radius of the drop will be

A particle is thrown vertically with a velocity of 50m/s. What time would it take to reach the height point? What would be its velocity at highest point? How high would the particle rise?

What is the amount of work to be done on a car of mass 1000 kg to increase its velocity from 10 km hr−1 to 20 km hr−1?

is S2 is he paramagnetic or diamagnetic

A motorcyclist drives from place A to B with a uniform speed of 30 km h−1 and returns from place B to A with a uniform speed of 20 km h−1. Find his average speed.

A man moves to go 50 m due south, 40 m due west, and 20 m due north to reach a field. Find what is his displacement from his house to the field?

The potential difference applied to an X -ray tube is 5 kV and the current through it is 3.2 mA. Then the number of the electrons striking the target per second is

A block of wood is floating on water with its dimensions 50 cm × 50 cm × 50 cm inside water. Calculate the buoyant force acting on the block. Take g = 9.8 N kg/1

A particle is projected with velocity u from a point on an inclined plane.iF v1 IS ITS VELOCITY ON STRIKING THE plane when the range up the plane is max. and v2 the velocity when the range down the plane is max. Relate these 3 vel.

what is realtionship between magnification and focal lengt

If the loudness of a sound is reduced to 1 % then its amplitude will be

Position of a particle varies as x=1/2t\ast t+1 , where x is in metres and t is in seconds, the average velocity of the body during t=0 to t=1s is what? (1) 2m/s (2) 1m/s (3) 1.5m/s (4) 0.5m/s

derivation of pushing or pulling a roller is easier explain with hand written

What will be the average velocity of the minute hand of a clock between 5:00 PM to 6:00 PM if its length is given as 15 cm?

Time period(T) is related to frequency(f) as

which type of collision take place in between photon and electron in photo electric effect

State two ways through which the strength of an electromagnet can be increased.

The mass of a planet is 6×1024 kg and its diameter is 12.8 ×103 km. If the value of a gravitational constant is 6.7 ×10-11 Nm2/kg2, calculate the value of acceleration due to gravity on the surface of the planet. What planet could this be?

33.The displacement-time graph for two particles A and B is as follows. The ratio VA/VB is

A particle of mass 2 m moving with velocity v strikes a stationary particles of mass 3 m and sticks to it. The speed of the system will be0.8 v0.2 v0.6 v0.4 v

Assertion-all combustion reactions are exothermic reason-enthalpies of products are greater than enthalpies o reac†an ts

In a progressive longitudnal wave, the separation between a compression and immediate rarefaction is 2.4 m, if its speed is 360 m/s, the frequency is:

Question 5 (b)What is the physical state of water at— (b)0∘C

Q. यूरोपीय संघ के संदर्भ में, निम्नलिखित कथनों पर विचार कीजिए। नीचे दिए गए कूटों का प्रयोग कर सही उत्तर का चयन कीजिए:

A shell is fired vertically upwards with a velocity v1 from a trolley moving horizontally with velocity v2. A person on the ground observed the motion of the shell as a parabola, whose horizontal range

a particle execute SHM from the mean position. its amplitude is A, its time period is T. at what displacement, its speed is half of its maximum speed.a)root 3A/2b)root 2A/3c)2A/root 3d)3A/root 2

If we drop three watermelons weighing 2 kg, 4 kg and 6 kg respectively from the same height and at the same time, which one of it will reach the ground first? (Given: negligible air resistance)

Define upthrust and state its S.I. unit.