13232 + Interview Questions in Physics Page 111 InterviewSolution

5501.	Three charge +Q, -q, and +q are placed at point A(0,2a), B(-a,0) and C(+a,0) respectively then the net force on the charge which is at point A will b
Answer» Three charge +Q, -q, and +q are placed at point A(0,2a), B(-a,0) and C(+a,0) respectively then the net force on the charge which is at point A will b

Discussion

5502.	How long should a flow of 1019 electrons be maintained between two points A and B to have a constant current of 8 A flowing between them?
Answer» How long should a flow of $10^{19}$ electrons be maintained between two points A and B to have a constant current of 8 A flowing between them?

Discussion

5503.	first law of motion
Answer» first law of motion

Discussion

5504.	A car has initial velocity of 5 m/s is increasing its acceleration uniformly by 2 m/s2. At what distance will be the car after 12 seconds ?
Answer» A car has initial velocity of 5 m/s is increasing its acceleration uniformly by 2 m/s2. At what distance will be the car after 12 seconds ?

Discussion

5505.	21. Why density increases in impurity defect?
Answer» 21. Why density increases in impurity defect?

Discussion

5506.	what is loventz force?
Answer» what is loventz force?

Discussion

5507.	an object of mass m is divided into two parts which are placed at dis†an ce d if gravitstional force of attraction is maximum between parts then find the ratio of mass of both par
Answer» an object of mass m is divided into two parts which are placed at dis†an ce d if gravitstional force of attraction is maximum between parts then find the ratio of mass of both par

Discussion

5508.	Can I known how to use this equation I have seen the motion videos but sometimes I just feel I don't anything so to encourage me for my tomorrow exam plz help me and suggest me some tips or work to be done by me plz AS A STUDENT OF BYJUS I WANT TO SCORE 50/50 .IN SCIENCE EXAM
Answer» Can I known how to use this equation I have seen the motion videos but sometimes I just feel I don't anything so to encourage me for my tomorrow exam plz help me and suggest me some tips or work to be done by me plz AS A STUDENT OF BYJUS I WANT TO SCORE 50/50 .IN SCIENCE EXAM

Discussion

5509.	Question 2Acid rain happens because(a) sun leads to heating of the upper layer of atmosphere(b) burning of fossil fuels release oxides of carbon, nitrogen and sulphur in the atmosphere(c) electrical charges are produced due to friction amongst clouds(d) earth atmosphere contains acids
Answer» Question 2 Acid rain happens because (a) sun leads to heating of the upper layer of atmosphere (b) burning of fossil fuels release oxides of carbon, nitrogen and sulphur in the atmosphere (c) electrical charges are produced due to friction amongst clouds (d) earth atmosphere contains acids

Discussion

5510.	There are two wires of the same length and of the same material and radii r and 2r . The ratio of their specific resistance is
Answer» There are two wires of the same length and of the same material and radii r and 2r . The ratio of their specific resistance is

Discussion

5511.	2.7 Henry's law constant for CO, in water is 1.67x108 Pa at 298 K. Calculate2the quantity of CO, in 500 mL of soda water when packed under 2.5 atmCO2 pressure at 298 K.
Answer» 2.7 Henry's law constant for CO, in water is 1.67x108 Pa at 298 K. Calculate2the quantity of CO, in 500 mL of soda water when packed under 2.5 atmCO2 pressure at 298 K.

Discussion

5512.	The value of g at the surface of earth is 9.8 m/s^2. Then the value of 'g' at a place 480 km above the surface of the earth will be nearly (radius of the earth is 6400 km)(1) 9.8 m/s^2(2) 7.2 m/s^2(3) 8.5 m/s^2(4) 4.2 m/s^{
Answer» The value of g at the surface of earth is 9.8 m/s^2. Then the value of 'g' at a place 480 km above the surface of the earth will be nearly (radius of the earth is 6400 km)(1) 9.8 m/s^2(2) 7.2 m/s^2(3) 8.5 m/s^2(4) 4.2 m/s^{

Discussion

5513.	Which of the following correctly describes the magnetic field near a long straight wire carrying current?
Answer» Which of the following correctly describes the magnetic field near a long straight wire carrying current?

Discussion

5514.	A variable force acts on a body as given \overrightarrow{F }=y i+x j . Find the work done to move the body from origin to(x,y
Answer» A variable force acts on a body as given \overrightarrow{F }=y i+x j . Find the work done to move the body from origin to(x,y

Discussion

5515.	Which of the following graph represents the variation of resistivity (ρ) with absolute temperature (T) for nichrome ?
Answer» Which of the following graph represents the variation of resistivity $(ρ)$ with absolute temperature $(T)$ for nichrome ?

Discussion

5516.	A hydrometer is used to measure the following quantity of a liquid:
Answer» A hydrometer is used to measure the following quantity of a liquid:

Discussion

5517.	In the circuit shown in figure, the power dissipated in the form of heat through the 6 Ω resistor is 6 W. What is the value of resistance R in the circuit?
Answer» In the circuit shown in figure, the power dissipated in the form of heat through the $6 Ω$ resistor is $6 W$ . What is the value of resistance $R$ in the circuit?

Discussion

5518.	Name some books which must be read by a students for studying and NSTSE , NSO and IMO.
Answer» Name some books which must be read by a students for studying and NSTSE , NSO and IMO.

Discussion

5519.	a barometer tube reads 75 cm ofHg.if the tube is gradually inclined at an angle 30^° with the horizontal keeping the open end in the mercury container,then find the length of the mercury column in the barometer tub
Answer» a barometer tube reads 75 cm ofHg.if the tube is gradually inclined at an angle 30^° with the horizontal keeping the open end in the mercury container,then find the length of the mercury column in the barometer tub

Discussion

5520.	99. The pressure of air increases by 100mm of Hg and the temperature decreases by 1�C. The change in speed of sound in air atSTP is
Answer» 99. The pressure of air increases by 100mm of Hg and the temperature decreases by 1�C. The change in speed of sound in air atSTP is

Discussion

5521.	A ship sends out ultrasound that returns from the seabed and is detected after 10 s. If the speed of ultrasound through seawater is 1578 m/s, what is the distance of the seabed from the ship?
Answer» A ship sends out ultrasound that returns from the seabed and is detected after 10 s. If the speed of ultrasound through seawater is 1578 m/s, what is the distance of the seabed from the ship?

Discussion

5522.	The value of 'g' at a particular point is 9.8m/s2. Suppose the earth suddenly shrinks uniformly to half its present size without losing any mass. What will be the value of 'g' at the same point?
Answer» The value of 'g' at a particular point is $9.8 m / s^{2}$ . Suppose the earth suddenly shrinks uniformly to half its present size without losing any mass. What will be the value of 'g' at the same point?

Discussion

5523.	what is the meaning of magnitude ?
Answer» what is the meaning of magnitude ?

Discussion

5524.	The advantages of electromagnet over a permanent magnet is/are
Answer» The advantages of electromagnet over a permanent magnet is/are

Discussion

5525.	Consider the situation shown in figure. The wire which has a mass of 2.00 g and length 20 cm, oscillates in its second harmonic and sets the air column in the closed tube into vibrations in its fundamental mode. Assuming that the speed of sound in air is 340 ms−1, find the tension in the wire.
Answer» Consider the situation shown in figure. The wire which has a mass of $2.00 g$ and length $20 cm$ , oscillates in its second harmonic and sets the air column in the closed tube into vibrations in its fundamental mode. Assuming that the speed of sound in air is $340 {ms}^{- 1}$ , find the tension in the wire.

Discussion

5526.	A skydiver with mass of 60 kg is moving at a terminal speed of 40 m in 2 seconds. Rate of work done by gravity is _____. Take g=10 ms−2
Answer» A skydiver with mass of $60 k g$ is moving at a terminal speed of $40 m$ in $2 s e c o n d s$ . Rate of work done by gravity is _____. Take $g = 10 m s^{- 2}$

Discussion

5527.	A body is accelerating in a straight line. The unbalanced force acts:
Answer» A body is accelerating in a straight line. The unbalanced force acts:

Discussion

5528.	Complete the following : (a) 1 light year = .......................... m (b) 1 m = ............................. A∘ (c) 1 m = ...............................µ (d) 1 micron = ................................A∘ (e) 1 fermi =.................................. m
Answer» Complete the following : (a) 1 light year = .......................... m (b) 1 m = ............................. $A^{\circ}$ (c) 1 m = ...............................µ (d) 1 micron = ................................ $A^{\circ}$ (e) 1 fermi =.................................. m

5528.

Complete the following : (a) 1 light year = .......................... m (b) 1 m = ............................. A∘ (c) 1 m = ...............................µ (d) 1 micron = ................................A∘ (e) 1 fermi =.................................. m

Answer»

Complete the following :

(a) 1 light year = .......................... m

(b) 1 m = ............................. $A^{\circ}$

(c) 1 m = ...............................µ

(d) 1 micron = ................................ $A^{\circ}$

(e) 1 fermi =.................................. m

Discussion

5529.	55.The maximum speed of a bus is 72 km/ he. It accelerates uniformly at a rate of 1m/ s2 and regards uniformly at a rate of 4 / s2. Find the least time in which it can do a journey of 1 km??
Answer» 55.The maximum speed of a bus is 72 km/ he. It accelerates uniformly at a rate of 1m/ s2 and regards uniformly at a rate of 4 / s2. Find the least time in which it can do a journey of 1 km??

Discussion

5530.	Arun is travelling with his friends in a car. The car suddenly stops due to some problem in the engine. Arun and his friends apply a force of 1000 N to drag the car to the nearest garage with a displacement of 1.2 km from that place. Determine the total power applied by them, if they dragged it to the nearest garage in 20 minutes.
Answer» Arun is travelling with his friends in a car. The car suddenly stops due to some problem in the engine. Arun and his friends apply a force of $1000 N$ to drag the car to the nearest garage with a displacement of $1.2 k m$ from that place. Determine the total power applied by them, if they dragged it to the nearest garage in $20$ minutes.

Discussion

5531.	15.What is the difference between fluorescence and scintillation?
Answer» 15.What is the difference between fluorescence and scintillation?

Discussion

5532.	Where does the gravitational potential energy comes from?
Answer» Where does the gravitational potential energy comes from?

Discussion

5533.	The distance traveled by a particle from rest and moving with an acceleration 4÷3 ms-2 in 3rd second is?
Answer» The distance traveled by a particle from rest and moving with an acceleration 4÷3 ms-2 in 3rd second is?

Discussion

5534.	How MCBs prevent the damage of household electric items?
Answer» How MCBs prevent the damage of household electric items?

Discussion

5535.	A ball thrown up, vertically returns to the thrower after 6 seconds find: (a) the velocity with which it was thrown up (b) the maximum height it reaches (c) its position after 4 seconds
Answer» A ball thrown up, vertically returns to the thrower after 6 seconds find: (a) the velocity with which it was thrown up (b) the maximum height it reaches (c) its position after 4 seconds

5535.

A ball thrown up, vertically returns to the thrower after 6 seconds find: (a) the velocity with which it was thrown up (b) the maximum height it reaches (c) its position after 4 seconds

Answer»

A ball thrown up, vertically returns to the thrower after 6 seconds find:

(a) the velocity with which it was thrown up

(b) the maximum height it reaches

(c) its position after 4 seconds

Discussion

5536.	A plane has a take-off speed of 120 ms−1 after covering a distance of 2400 m. Determine the acceleration (a) of the plane and the time (t) required to reach that speed.
Answer» A plane has a take-off speed of $120 m s^{- 1}$ after covering a distance of $2400 m$ . Determine the acceleration $(a)$ of the plane and the time $(t)$ required to reach that speed.

Discussion

5537.	कोमल और कठोर दोनों भाव किस प्रकार गांधीजी के व्यक्तित्व की विशेषता बन गए।
Answer» कोमल और कठोर दोनों भाव किस प्रकार गांधीजी के व्यक्तित्व की विशेषता बन गए।

Discussion

5538.	A man stands on a weighing machine. The weighing machine Shows 45.Is 45 the weight or the mass.(2 marks)
Answer» A man stands on a weighing machine. The weighing machine Shows 45.Is 45 the weight or the mass.(2 marks)

Discussion

5539.	A 2.0 cm high object is placed at a distance of 20 cm from a concave mirror. A real image is formed at 40 cm from the mirror. Calculate the focal length of the mirror and the size of the image.
Answer» A $2.0 cm$ high object is placed at a distance of $20 cm$ from a concave mirror. A real image is formed at $40 cm$ from the mirror. Calculate the focal length of the mirror and the size of the image.

Discussion

5540.	A lens is found to form both real and virtual images of an object, depending on the position of the object with respect to the lens. What kind of lens is it–convex or concave?
Answer» A lens is found to form both real and virtual images of an object, depending on the position of the object with respect to the lens. What kind of lens is it–convex or concave?

Discussion

5541.	Paragraph for below questionनीचे दिये गये प्रश्न के लिए अनुच्छेदWerner Heisenberg states that it is impossible to determine simultaneously, the exact position and exact momentum (or velocity) of an electron. Mathematically, Δx×Δpx≥h4π where, Δx is the uncertainty in position, Δpx is the uncertainty in momentum and h is Planck’s constant.वर्नर हाइजेनबर्ग के अनुसार, एक इलेक्ट्रॉन की सही स्थिति तथा सही संवेग (या वेग) का एक साथ निर्धारण करना असंभव है। गणितीय रूप से Δx×Δpx≥h4π जहाँ Δx स्थिति में अनिश्चितता, Δpx संवेग में अनिश्चितता और h प्लांक नियतांक है।Q. If uncertainty in position is equal to the uncertainty in momentum then uncertainty in velocity isप्रश्न - यदि स्थिति में अनिश्चितता संवेग में अनिश्चितता के बराबर है, तो वेग में अनिश्चितता है
Answer» Paragraph for below question नीचे दिये गये प्रश्न के लिए अनुच्छेद Werner Heisenberg states that it is impossible to determine simultaneously, the exact position and exact momentum (or velocity) of an electron. Mathematically, $Δ x \times Δ p_{x} \geq \frac{h}{4 π}$ where, Δx is the uncertainty in position, Δp_x is the uncertainty in momentum and h is Planck’s constant. वर्नर हाइजेनबर्ग के अनुसार, एक इलेक्ट्रॉन की सही स्थिति तथा सही संवेग (या वेग) का एक साथ निर्धारण करना असंभव है। गणितीय रूप से $Δ x \times Δ p_{x} \geq \frac{h}{4 π}$ जहाँ Δx स्थिति में अनिश्चितता, Δp_x संवेग में अनिश्चितता और h प्लांक नियतांक है। Q. If uncertainty in position is equal to the uncertainty in momentum then uncertainty in velocity is प्रश्न - यदि स्थिति में अनिश्चितता संवेग में अनिश्चितता के बराबर है, तो वेग में अनिश्चितता है

5541.

Paragraph for below questionनीचे दिये गये प्रश्न के लिए अनुच्छेदWerner Heisenberg states that it is impossible to determine simultaneously, the exact position and exact momentum (or velocity) of an electron. Mathematically, Δx×Δpx≥h4π where, Δx is the uncertainty in position, Δpx is the uncertainty in momentum and h is Planck’s constant.वर्नर हाइजेनबर्ग के अनुसार, एक इलेक्ट्रॉन की सही स्थिति तथा सही संवेग (या वेग) का एक साथ निर्धारण करना असंभव है। गणितीय रूप से Δx×Δpx≥h4π जहाँ Δx स्थिति में अनिश्चितता, Δpx संवेग में अनिश्चितता और h प्लांक नियतांक है।Q. If uncertainty in position is equal to the uncertainty in momentum then uncertainty in velocity isप्रश्न - यदि स्थिति में अनिश्चितता संवेग में अनिश्चितता के बराबर है, तो वेग में अनिश्चितता है

Answer»

Paragraph for below question

नीचे दिये गये प्रश्न के लिए अनुच्छेद

Werner Heisenberg states that it is impossible to determine simultaneously, the exact position and exact momentum (or velocity) of an electron. Mathematically,

Δ x \times Δ p_{x} \geq \frac{h}{4 π}

where, Δx is the uncertainty in position, Δp_x is the uncertainty in momentum and h is Planck’s constant.

वर्नर हाइजेनबर्ग के अनुसार, एक इलेक्ट्रॉन की सही स्थिति तथा सही संवेग (या वेग) का एक साथ निर्धारण करना असंभव है। गणितीय रूप से

Δ x \times Δ p_{x} \geq \frac{h}{4 π}

जहाँ Δx स्थिति में अनिश्चितता, Δp_x संवेग में अनिश्चितता और h प्लांक नियतांक है।

Q. If uncertainty in position is equal to the uncertainty in momentum then uncertainty in velocity is

प्रश्न - यदि स्थिति में अनिश्चितता संवेग में अनिश्चितता के बराबर है, तो वेग में अनिश्चितता है

Discussion

5542.	24.A man drops a 10 kg rock from the top of a 5 m ladder . what is its speed just before it hits the ground ? What is its kinetic energy when it reaches the ground
Answer» 24.A man drops a 10 kg rock from the top of a 5 m ladder . what is its speed just before it hits the ground ? What is its kinetic energy when it reaches the ground

Discussion

5543.	Magnets like every other thing, are made up atoms. So why do they behave differently from other objects as in case of attracting and repelling one another as well as in attracting iron?
Answer» Magnets like every other thing, are made up atoms. So why do they behave differently from other objects as in case of attracting and repelling one another as well as in attracting iron?

Discussion

5544.	Which of the following pairs of quantities cannot simultaneously be non-zero and constant for a body?
Answer» Which of the following pairs of quantities cannot simultaneously be non-zero and constant for a body?

Discussion

5545.	For the given object (O) and mirror arrangement, the velocity (in m/s) of the image with respect to ground will be[All the velocities are given with respect to ground]
Answer» For the given object (O) and mirror arrangement, the velocity $($ in $m/s)$ of the image with respect to ground will be $[$ All the velocities are given with respect to ground $]$

Discussion

5546.	The direction of the force experienced by a conductor when placed in a magnetic field depends upon
Answer» The direction of the force experienced by a conductor when placed in a magnetic field depends upon

Discussion

5547.	48. a= 2t i u= 2 j Find Radius Of Curvature at 2 second
Answer» 48. a= 2t i u= 2 j Find Radius Of Curvature at 2 second

Discussion

5548.	A body moves along the path OABC. Which of the following statement about it's position-time graph is true?
Answer» A body moves along the path OABC. Which of the following statement about it's position-time graph is true?

Discussion

5549.	The orbital electron of the hydrogen atom jumps from the ground state to a higher energy state and its orbital velocity is reduced to one third of its initial value. If the radius of the orbit in ground state is r, what is the radius of new orbit?
Answer» The orbital electron of the hydrogen atom jumps from the ground state to a higher energy state and its orbital velocity is reduced to one third of its initial value. If the radius of the orbit in ground state is $r$ , what is the radius of new orbit?

Discussion

5550.	Write the formula for buoyant force in a liquid and explain the terms in it. A, B, and C are three science students. They have 3 objects of relative densities 0.9,1, and 1.5 but with the same volume. Student A took the object with RD =0.9, student B took the object with RD =1, and student C took the last object. All three of them completely immersed their objects in water and removed their hands. What can be the observations of the three students about the force of buoyancy acting on the three objects: When they immersed the objects completely in water. When they removed their hands after immersing the objects.
Answer» Write the formula for buoyant force in a liquid and explain the terms in it. A, B, and C are three science students. They have $3$ objects of relative densities $0.9, 1,$ and $1.5$ but with the same volume. Student A took the object with RD $= 0.9$ , student B took the object with RD $= 1$ , and student C took the last object. All three of them completely immersed their objects in water and removed their hands. What can be the observations of the three students about the force of buoyancy acting on the three objects: When they immersed the objects completely in water. When they removed their hands after immersing the objects.

Discussion

Explore topic-wise InterviewSolutions in .

Three charge +Q, -q, and +q are placed at point A(0,2a), B(-a,0) and C(+a,0) respectively then the net force on the charge which is at point A will b

How long should a flow of 1019 electrons be maintained between two points A and B to have a constant current of 8 A flowing between them?

first law of motion

A car has initial velocity of 5 m/s is increasing its acceleration uniformly by 2 m/s2. At what distance will be the car after 12 seconds ?

21. Why density increases in impurity defect?

what is loventz force?

an object of mass m is divided into two parts which are placed at dis†an ce d if gravitstional force of attraction is maximum between parts then find the ratio of mass of both par

Can I known how to use this equation I have seen the motion videos but sometimes I just feel I don't anything so to encourage me for my tomorrow exam plz help me and suggest me some tips or work to be done by me plz AS A STUDENT OF BYJUS I WANT TO SCORE 50/50 .IN SCIENCE EXAM

Question 2Acid rain happens because(a) sun leads to heating of the upper layer of atmosphere(b) burning of fossil fuels release oxides of carbon, nitrogen and sulphur in the atmosphere(c) electrical charges are produced due to friction amongst clouds(d) earth atmosphere contains acids

There are two wires of the same length and of the same material and radii r and 2r . The ratio of their specific resistance is

2.7 Henry's law constant for CO, in water is 1.67x108 Pa at 298 K. Calculate2the quantity of CO, in 500 mL of soda water when packed under 2.5 atmCO2 pressure at 298 K.

The value of g at the surface of earth is 9.8 m/s^2. Then the value of 'g' at a place 480 km above the surface of the earth will be nearly (radius of the earth is 6400 km)(1) 9.8 m/s^2(2) 7.2 m/s^2(3) 8.5 m/s^2(4) 4.2 m/s^{

Which of the following correctly describes the magnetic field near a long straight wire carrying current?

A variable force acts on a body as given \overrightarrow{F }=y i+x j . Find the work done to move the body from origin to(x,y

Which of the following graph represents the variation of resistivity (ρ) with absolute temperature (T) for nichrome ?

A hydrometer is used to measure the following quantity of a liquid:

In the circuit shown in figure, the power dissipated in the form of heat through the 6 Ω resistor is 6 W. What is the value of resistance R in the circuit?

Name some books which must be read by a students for studying and NSTSE , NSO and IMO.

a barometer tube reads 75 cm ofHg.if the tube is gradually inclined at an angle 30^° with the horizontal keeping the open end in the mercury container,then find the length of the mercury column in the barometer tub

99. The pressure of air increases by 100mm of Hg and the temperature decreases by 1�C. The change in speed of sound in air atSTP is

A ship sends out ultrasound that returns from the seabed and is detected after 10 s. If the speed of ultrasound through seawater is 1578 m/s, what is the distance of the seabed from the ship?

The value of 'g' at a particular point is 9.8m/s2. Suppose the earth suddenly shrinks uniformly to half its present size without losing any mass. What will be the value of 'g' at the same point?

what is the meaning of magnitude ?

The advantages of electromagnet over a permanent magnet is/are

Consider the situation shown in figure. The wire which has a mass of 2.00 g and length 20 cm, oscillates in its second harmonic and sets the air column in the closed tube into vibrations in its fundamental mode. Assuming that the speed of sound in air is 340 ms−1, find the tension in the wire.

A skydiver with mass of 60 kg is moving at a terminal speed of 40 m in 2 seconds. Rate of work done by gravity is _____. Take g=10 ms−2

A body is accelerating in a straight line. The unbalanced force acts:

Complete the following : (a) 1 light year = .......................... m (b) 1 m = ............................. A∘ (c) 1 m = ...............................µ (d) 1 micron = ................................A∘ (e) 1 fermi =.................................. m

55.The maximum speed of a bus is 72 km/ he. It accelerates uniformly at a rate of 1m/ s2 and regards uniformly at a rate of 4 / s2. Find the least time in which it can do a journey of 1 km??

15.What is the difference between fluorescence and scintillation?

Where does the gravitational potential energy comes from?

The distance traveled by a particle from rest and moving with an acceleration 4÷3 ms-2 in 3rd second is?

How MCBs prevent the damage of household electric items?

A ball thrown up, vertically returns to the thrower after 6 seconds find: (a) the velocity with which it was thrown up (b) the maximum height it reaches (c) its position after 4 seconds

A plane has a take-off speed of 120 ms−1 after covering a distance of 2400 m. Determine the acceleration (a) of the plane and the time (t) required to reach that speed.

कोमल और कठोर दोनों भाव किस प्रकार गांधीजी के व्यक्तित्व की विशेषता बन गए।

A man stands on a weighing machine. The weighing machine Shows 45.Is 45 the weight or the mass.(2 marks)

A 2.0 cm high object is placed at a distance of 20 cm from a concave mirror. A real image is formed at 40 cm from the mirror. Calculate the focal length of the mirror and the size of the image.

A lens is found to form both real and virtual images of an object, depending on the position of the object with respect to the lens. What kind of lens is it–convex or concave?

24.A man drops a 10 kg rock from the top of a 5 m ladder . what is its speed just before it hits the ground ? What is its kinetic energy when it reaches the ground

Magnets like every other thing, are made up atoms. So why do they behave differently from other objects as in case of attracting and repelling one another as well as in attracting iron?

Which of the following pairs of quantities cannot simultaneously be non-zero and constant for a body?

For the given object (O) and mirror arrangement, the velocity (in m/s) of the image with respect to ground will be[All the velocities are given with respect to ground]

The direction of the force experienced by a conductor when placed in a magnetic field depends upon

48. a= 2t i u= 2 j Find Radius Of Curvature at 2 second

A body moves along the path OABC. Which of the following statement about it's position-time graph is true?

The orbital electron of the hydrogen atom jumps from the ground state to a higher energy state and its orbital velocity is reduced to one third of its initial value. If the radius of the orbit in ground state is r, what is the radius of new orbit?