50278 + Interview Questions in Physics

1.	The potential difference between points A and B is
Answer» The potential difference between points A and B is

Discussion

2.	This body is in ___
Answer» This body is in ___

Discussion

3.	An ideal choke takes a current of 8 ampere when conto an AC supply of 100 volt and 50 Hz, A pure resistor underthe same conditions takes a current of 10 ampere. If the twor 18are connected to an AC supply of 150 volt and 40 Hz, thenthe current in a series combination of the above resistor andinductor is:
Answer» An ideal choke takes a current of 8 ampere when conto an AC supply of 100 volt and 50 Hz, A pure resistor underthe same conditions takes a current of 10 ampere. If the twor 18are connected to an AC supply of 150 volt and 40 Hz, thenthe current in a series combination of the above resistor andinductor is:

Discussion

4.	Which of the following is the possible energy of an excited state of hydrogen atom?
Answer» Which of the following is the possible energy of an excited state of hydrogen atom?

Discussion

5.	Two coherent light sources P and Q each of wavelength λ are separated by a distance 3λ as shown. The maximum number of minima formed on line AB which runs from −∞ to +∞ is: (correct answer + 1, wrong answer - 0.25)
Answer» Two coherent light sources $P$ and $Q$ each of wavelength $λ$ are separated by a distance $3 λ$ as shown. The maximum number of minima formed on line $A B$ which runs from $- \infty$ to $+ \infty$ is: (correct answer + 1, wrong answer - 0.25)

Discussion

6.	in a uniform sphere of charge (charge density p) , a small cavity is created. the center of cavity is at distance 'a' from center of sphere. taking the center of sphere as origin and as a unit vector along the line joining the center of cavity and origin. find the electric field at any point inside the cavity?
Answer» in a uniform sphere of charge (charge density p) , a small cavity is created. the center of cavity is at distance 'a' from center of sphere. taking the center of sphere as origin and as a unit vector along the line joining the center of cavity and origin. find the electric field at any point inside the cavity?

Discussion

7.	A solid body rotates about a stationary axis with an angular deceleration β∝√ω where ω is its angular velocity. If at the initial moment of time, its angular velocity was equal to ω0, then the mean angular velocity of the body averaged over the whole time of rotation till it comes to rest is,
Answer» A solid body rotates about a stationary axis with an angular deceleration $β \propto \sqrt{ω}$ where $ω$ is its angular velocity. If at the initial moment of time, its angular velocity was equal to $ω_{0}$ , then the mean angular velocity of the body averaged over the whole time of rotation till it comes to rest is,

Discussion

8.	Question 12In torches, search lights and headlights of vehicles the bulb is placed(a) between the pole and the focus of the reflector(b) very near to the focus of the reflector(c) between the focus and centre of curvature of the reflector(d) at the centre of curvature of the reflector
Answer» Question 12 In torches, search lights and headlights of vehicles the bulb is placed (a) between the pole and the focus of the reflector (b) very near to the focus of the reflector (c) between the focus and centre of curvature of the reflector (d) at the centre of curvature of the reflector

Discussion

9.	current of 0.0965 ampere is passed for 1000 secondsthrough 50 mL of 0.1 M KCl using inert electrode at 25^° CThe pH of solution is
Answer» current of 0.0965 ampere is passed for 1000 secondsthrough 50 mL of 0.1 M KCl using inert electrode at 25^° CThe pH of solution is

Discussion

10.	In a certain code, MISSIONS is written as MSIISNOS. How is ONLINE written in that code?
Answer» In a certain code, $M I S S I O N S$ is written as $M S I I S N O S .$ How is $O N L I N E$ written in that code?

Discussion

11.	A string of length 0.4 m and mass 10−2 kg is tightly clampled at its ends. The tension in the string is 1.6 N. identical wave pulses are produced at one end at equal intervals of time ∆t. The minimum value of ∆t, which allows constructive interference between succesive pulses, is :
Answer» A string of length 0.4 m and mass $10^{- 2}$ kg is tightly clampled at its ends. The tension in the string is 1.6 N. identical wave pulses are produced at one end at equal intervals of time ∆t. The minimum value of ∆t, which allows constructive interference between succesive pulses, is :

Discussion

12.	When a current of 100 μA is passed through a galvanometer, it gives a full deflection of 50 divisions. If resistance of galvanometer is 1000 Ω, its voltage semitivity is
Answer» When a current of $100 μ A$ is passed through a galvanometer, it gives a full deflection of $50 divisions$ . If resistance of galvanometer is $1000 Ω$ , its voltage semitivity is

Discussion

13.	The half life of a radioactive isotope 'X' is 20 years.It decays to another element 'Y' which is stable.The two elements 'X' and 'Y' were found to be in the ratio 1:7 in a sample of a given rock.The age of the rock is estimated to be: a)100 years b)40 years c)60 years d)80 years
Answer» The half life of a radioactive isotope 'X' is 20 years.It decays to another element 'Y' which is stable.The two elements 'X' and 'Y' were found to be in the ratio 1:7 in a sample of a given rock.The age of the rock is estimated to be: a)100 years b)40 years c)60 years d)80 years

Discussion

14.	Charges Q,2Q and −Q are given to three concentric conducting spherical shells A,B and C respectively as shown in figure. The ratio of charges on the inner and outer surfaces of shell C will be
Answer» Charges $Q, 2 Q$ and $- Q$ are given to three concentric conducting spherical shells $A, B$ and $C$ respectively as shown in figure. The ratio of charges on the inner and outer surfaces of shell $C$ will be

Discussion

15.	Which graph shows the relationship between Xc and f?
Answer» Which graph shows the relationship between X_c and f?

Discussion

16.	A solid sphere of radius R has a volume charge density ρ=ρ0r3 (where ρ0 is a constant and r is the distance from center). At a distance x from its centre (for x < R), the electric field is directly proportional to:
Answer» A solid sphere of radius R has a volume charge density $ρ = ρ_{0} r^{3}$ (where $ρ_{0}$ is a constant and r is the distance from center). At a distance x from its centre (for x < R), the electric field is directly proportional to:

Discussion

17.	a particle of mass 2 kg is moving along line AB according to y=x-4 with the speed of 4m/s , then angular momentum about O i
Answer» a particle of mass 2 kg is moving along line AB according to y=x-4 with the speed of 4m/s , then angular momentum about O i

Discussion

18.	A wire carries a steady current of 50 A as shown in the figure. Find the magnetic field caused by a 1 cm segment of this wire at a point P, which is 1 m away.
Answer» A wire carries a steady current of $50 A$ as shown in the figure. Find the magnetic field caused by a $1 cm$ segment of this wire at a point $P$ , which is $1 m$ away.

Discussion

19.	A rod OA of mass m and length L is rotating in a horizontal circle about point O as shown in figure. B is the mid-point of rod. If T represents tension in the rod at any point and Uo represents elastic strain energy stored in the rod OA, UB represents elastic strain energy stored in the rod (OB) then choose correct alternative (s).
Answer» A rod $O A$ of mass $m$ and length $L$ is rotating in a horizontal circle about point $O$ as shown in figure. $B$ is the mid-point of rod. If $T$ represents tension in the rod at any point and $U_{o}$ represents elastic strain energy stored in the rod $O A$ , $U_{B}$ represents elastic strain energy stored in the rod $(O B)$ then choose correct alternative (s).

Discussion

20.	A system of consists of particles of mass 4 kg placed at (4,0),6 kg placed at (0,−4) and 3 kg placed at (−3,4). How far from the origin must a particle of mass 10 kg be placed so that the moment of inertia of the system about the origin becomes 300 kgm2?
Answer» A system of consists of particles of mass $4 kg$ placed at $(4, 0), 6 kg$ placed at $(0, - 4)$ and $3 kg$ placed at $(- 3, 4)$ . How far from the origin must a particle of mass $10 kg$ be placed so that the moment of inertia of the system about the origin becomes $300 {kgm}^{2}$ ?

Discussion

21.	A U shaped container has uniform cross-sectional area S. It is suspended vertically with the help of a spring and two strings A and B as shown. The springs and strings are light. When water (density =d) is poured slowly into the container it was observed that the level of water remained unchanged with respect to the ground. If the force constant of spring is found to be ySdg, then the value of 4y is
Answer» A U shaped container has uniform cross-sectional area $S$ . It is suspended vertically with the help of a spring and two strings $A$ and $B$ as shown. The springs and strings are light. When water (density $= d$ ) is poured slowly into the container it was observed that the level of water remained unchanged with respect to the ground. If the force constant of spring is found to be $y S d g$ , then the value of $4 y$ is

Discussion

22.	A ball is dropped on the floor from a height of 10 m. It rebounds to a height of 2.5 m. If the ball is in contact with the floor for 0.01 sec, the average acceleration during contact is
Answer» A ball is dropped on the floor from a height of 10 m. It rebounds to a height of 2.5 m. If the ball is in contact with the floor for 0.01 sec, the average acceleration during contact is

Discussion

23.	31.A charge q is placed just above one of the vertices of the square at a distance 'a' from it. If the side length of the square is 'a', what is the flux through the square?1
Answer» 31.A charge q is placed just above one of the vertices of the square at a distance 'a' from it. If the side length of the square is 'a', what is the flux through the square?1

Discussion

24.	Figure below shows a light spring balance connected to two blocks of mass 20 kg each. The graduations in the balance measure the tension in the spring. What is the reading of the balance?
Answer» Figure below shows a light spring balance connected to two blocks of mass 20 kg each. The graduations in the balance measure the tension in the spring. What is the reading of the balance?

24.

Figure below shows a light spring balance connected to two blocks of mass 20 kg each. The graduations in the balance measure the tension in the spring. What is the reading of the balance?

Answer»

Figure below shows a light spring balance connected to two blocks of mass 20 kg each. The graduations in the balance measure the tension in the spring. What is the reading of the balance?

Discussion

25.	What is the magnitude of electric field intensity due to a short dipole of moment of magnitude 2×10−8 C -m at a point 1 m from the centre of the dipole, when the line joining the point to the centre of the dipole makes an angle of 60∘ with the dipole axis?
Answer» What is the magnitude of electric field intensity due to a short dipole of moment of magnitude $2 \times 10^{- 8} C -m$ at a point $1 m$ from the centre of the dipole, when the line joining the point to the centre of the dipole makes an angle of $60^{\circ}$ with the dipole axis?

Discussion

26.	A body is projected up with a speed V along the line of greatest slope of an inclined plane of angle of inclination β. If the body collides elastically perpendicular to the inclined plane, find the time after which it crosses through its point of projection after collision ?
Answer» A body is projected up with a speed $V$ along the line of greatest slope of an inclined plane of angle of inclination $β$ . If the body collides elastically perpendicular to the inclined plane, find the time after which it crosses through its point of projection after collision ?

Discussion

27.	A particle is moving rectilinearly so that its acceleration is given as a(m/s2)=3t2+1 Its initial velocity is zero then the velocity of the particle at t=1 s will be
Answer» A particle is moving rectilinearly so that its acceleration is given as $a (m / s^{2}) = 3 t^{2} + 1$ Its initial velocity is zero then the velocity of the particle at $t = 1$ s will be

Discussion

28.	if P represent radiation pressure c represent speed of kight and Q represent radiation energy striking a unit area per second then non zero integers x,y,z such that pxQycz is dimensionless are? 1. x=1 , y=1 , z =-1 2. x =1 , y=-1 , z=1 3. x=1 ,y =1 , z =
Answer» if P represent radiation pressure c represent speed of kight and Q represent radiation energy striking a unit area per second then non zero integers x,y,z such that pxQycz is dimensionless are? 1. x=1 , y=1 , z =-1 2. x =1 , y=-1 , z=1 3. x=1 ,y =1 , z =

Discussion

29.	A machine is blowing spherical soap bubbles of different radii filled with helium gas. It is found that if the bubbles have a radius smaller than 1 cm, then they sink to the floor in still air. Larger bubbles float in the air. Assume that the thickness of the soap film in all bubbles is uniform and equal. Assume that the density of soap solution is same as that of water (= 1000 kgm−3). The density of helium inside the bubbles and air are 0.18 kg m−3 and 1.23 kg m−3, respectively. Then the thickness of the soap film of the bubbles is (note 1 μ m = 10−6 m)
Answer» A machine is blowing spherical soap bubbles of different radii filled with helium gas. It is found that if the bubbles have a radius smaller than 1 cm, then they sink to the floor in still air. Larger bubbles float in the air. Assume that the thickness of the soap film in all bubbles is uniform and equal. Assume that the density of soap solution is same as that of water (= 1000 $k g m^{- 3})$ . The density of helium inside the bubbles and air are 0.18 kg $m^{- 3}$ and 1.23 kg $m^{- 3}$ , respectively. Then the thickness of the soap film of the bubbles is (note 1 $μ$ m = $10^{- 6}$ m)

Discussion

30.	Find out the electric force experienced by +5 μC charge at point A(0,5,0) m due to a point charge −25 μC situated at point B(2,8,√12) m.
Answer» Find out the electric force experienced by $+ 5 μ C$ charge at point $A (0, 5, 0) m$ due to a point charge $- 25 μ C$ situated at point $B (2, 8, \sqrt{12}) m$ .

Discussion

31.	In a car race sound signals emitted by the two cars are detected by the detector on the straight track at the end point of the race. Frequency observed are 330 Hz & 360 Hz and the original frequency is 300 Hz of both cars. Race ends with the separation of 100 m between the cars. Assume both cars move with constant velocity and velocity of sound is 330 m/s. Find the tiime taken by winning car (in sec.)
Answer» In a car race sound signals emitted by the two cars are detected by the detector on the straight track at the end point of the race. Frequency observed are 330 Hz & 360 Hz and the original frequency is 300 Hz of both cars. Race ends with the separation of 100 m between the cars. Assume both cars move with constant velocity and velocity of sound is 330 m/s. Find the tiime taken by winning car (in sec.)

Discussion

32.	A capacitor is to be designed to operate, with constant capacitance, even when temperature varies. The distance between plates is adjusted by spacer to compensate temperature effect. Let α1 and α2 be the coefficient of thermal expansion of plate and spacer respectively. Find the ratio of α2α1,___
Answer» A capacitor is to be designed to operate, with constant capacitance, even when temperature varies. The distance between plates is adjusted by spacer to compensate temperature effect. Let $α_{1}$ and $α_{2}$ be the coefficient of thermal expansion of plate and spacer respectively. Find the ratio of $\frac{α_{2}}{α_{1}}$ ,___

Discussion

33.	four particles each having charge q, are placed on the four vertices of a regular pentagon . the dis†an ce of each corner from the centre is a. find the electric field at th centre of pentagon
Answer» four particles each having charge q, are placed on the four vertices of a regular pentagon . the dis†an ce of each corner from the centre is a. find the electric field at th centre of pentagon

Discussion

34.	Light of wavelength λ falls on a metal having work function hcλ0. Photoelectric effect will take place only if
Answer» Light of wavelength $λ$ falls on a metal having work function $\frac{h c}{λ_{0}}$ . Photoelectric effect will take place only if

Discussion

35.	A 20m deep well 3m in diameter is filled with water up to a depth of 14m. How long will a 5hp engine take to empty the well?
Answer» A 20m deep well 3m in diameter is filled with water up to a depth of 14m. How long will a 5hp engine take to empty the well?

Discussion

36.	A satellite in force-free space sweeps stationary interplanetary dust at a rate of dM/dt=av, whereM is mass and v is the speed of satellite and α is a constant The tangential acceleration ofsatellite is -av^2/2m -av^2 -2av^2/m -av^2/
Answer» A satellite in force-free space sweeps stationary interplanetary dust at a rate of dM/dt=av, whereM is mass and v is the speed of satellite and α is a constant The tangential acceleration ofsatellite is -av^2/2m -av^2 -2av^2/m -av^2/

Discussion

37.	A body of mass m is moving on a rough horizontal surface. The frictional force acting on it is(a) mg(b) 2mg(c) mg/2(d) Zero
Answer» A body of mass m is moving on a rough horizontal surface. The frictional force acting on it is (a) mg (b) 2mg (c) mg/2 (d) Zero

Discussion

38.	The CFSE for octahedral (CoCl6)4− is 18000Cm−1. The CFSE for tetrahedral (CoCl4)2− will be
Answer» The CFSE for octahedral $(C o C l_{6})^{4 -} i s 18000 C m^{- 1}$ . The CFSE for tetrahedral $(C o C l_{4})^{2 -}$ will be

Discussion

39.	X ray or gamma ray which has the most penetrating power and ho
Answer» X ray or gamma ray which has the most penetrating power and ho

Discussion

40.	Molar specific heat at constant volume for a non-linear triatomic gas ( neglect vibration of molecules) is:
Answer» Molar specific heat at constant volume for a non-linear triatomic gas ( neglect vibration of molecules) is:

Discussion

41.	A particle having zero Reshma and non zero energy and Momentum must travel with a speed
Answer» A particle having zero Reshma and non zero energy and Momentum must travel with a speed

Discussion

42.	A magnetic needle is kept in a non uniform magnetic field. It experiences:
Answer» A magnetic needle is kept in a non uniform magnetic field. It experiences:

Discussion

43.	Two vessels have the same base area but different shapes. The first vessel takes twice the volume of water that the second vessel requires to fill upto a particular common height. Is the force exerted by the water on the base of the vessel the same in the two cases ? If so, why do the vessels filled with water to that same height give different readings on a weighing scale ?
Answer» Two vessels have the same base area but different shapes. The first vessel takes twice the volume of water that the second vessel requires to fill upto a particular common height. Is the force exerted by the water on the base of the vessel the same in the two cases ? If so, why do the vessels filled with water to that same height give different readings on a weighing scale ?

Discussion

44.	The time constant of a capacitor is 5sec. If the capacitance is C=100nF and it is charged from zero by a cell of EMF 10V through a resistor. What is the charge on it after 3 seconds?
Answer» The time constant of a capacitor is 5sec. If the capacitance is C=100nF and it is charged from zero by a cell of EMF 10V through a resistor. What is the charge on it after 3 seconds?

Discussion

45.	A disc of mass m is connected to two springs having spring constants k1 and k2 as shown in the figure. Find the time period of oscillation.
Answer» A disc of mass m is connected to two springs having spring constants $k_{1}$ and $k_{2}$ as shown in the figure. Find the time period of oscillation.

Discussion

46.	A tuning fork vibrating with a sonometer having a wire of length 20 cm produces 5 beats per second the beats frequency does not change if the length of wire is changed to 21cm the frequency of the tuning fork must be
Answer» A tuning fork vibrating with a sonometer having a wire of length 20 cm produces 5 beats per second the beats frequency does not change if the length of wire is changed to 21cm the frequency of the tuning fork must be

Discussion

47.	An object has a displacement from position vector \overrightarrow{r_1}=(2\oversetΛ i+3\oversetΛ j)m to \overrightarrow{r_2}=(4\oversetΛ i+6\oversetΛ j)m under a force \overrightarrow F=(3x^2\oversetΛ i+2y\oversetΛ j)N, then work done by the force is (1) 24 J (2) 33 J (3) 83 J (4) 45 J
Answer» An object has a displacement from position vector \overrightarrow{r_1}=(2\oversetΛ i+3\oversetΛ j)m to \overrightarrow{r_2}=(4\oversetΛ i+6\oversetΛ j)m under a force \overrightarrow F=(3x^2\oversetΛ i+2y\oversetΛ j)N, then work done by the force is (1) 24 J (2) 33 J (3) 83 J (4) 45 J

Discussion

48.	81. How to calculate moment of inertia of right angled triangle towards the centre and perpendicular to plane??
Answer» 81. How to calculate moment of inertia of right angled triangle towards the centre and perpendicular to plane??

Discussion

49.	2.1 g of graphite is burnt in a bomb calorimeter in excess of oxygen at 298K and 1 atmospheric pressure .During the reaction, temperature rises from 298K to 299K. If the heat capacity of the bomb calorimeter is 20.7kJ/K, what is the enthalpy change for the above reaction at 298k and 1 atm?
Answer» 2.1 g of graphite is burnt in a bomb calorimeter in excess of oxygen at 298K and 1 atmospheric pressure .During the reaction, temperature rises from 298K to 299K. If the heat capacity of the bomb calorimeter is 20.7kJ/K, what is the enthalpy change for the above reaction at 298k and 1 atm?

Discussion

50.	The moment of force f is equal to 4 ICAP + 5 j cap - 6 k cap at 2,0, -3 about the point 2, - 2, - 2 is given by bhai
Answer» The moment of force f is equal to 4 ICAP + 5 j cap - 6 k cap at 2,0, -3 about the point 2, - 2, - 2 is given by bhai

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The potential difference between points A and B is

This body is in ___

Which of the following is the possible energy of an excited state of hydrogen atom?

Two coherent light sources P and Q each of wavelength λ are separated by a distance 3λ as shown. The maximum number of minima formed on line AB which runs from −∞ to +∞ is: (correct answer + 1, wrong answer - 0.25)

Question 12In torches, search lights and headlights of vehicles the bulb is placed(a) between the pole and the focus of the reflector(b) very near to the focus of the reflector(c) between the focus and centre of curvature of the reflector(d) at the centre of curvature of the reflector

current of 0.0965 ampere is passed for 1000 secondsthrough 50 mL of 0.1 M KCl using inert electrode at 25^° CThe pH of solution is

In a certain code, MISSIONS is written as MSIISNOS. How is ONLINE written in that code?

A string of length 0.4 m and mass 10−2 kg is tightly clampled at its ends. The tension in the string is 1.6 N. identical wave pulses are produced at one end at equal intervals of time ∆t. The minimum value of ∆t, which allows constructive interference between succesive pulses, is :

When a current of 100 μA is passed through a galvanometer, it gives a full deflection of 50 divisions. If resistance of galvanometer is 1000 Ω, its voltage semitivity is

The half life of a radioactive isotope 'X' is 20 years.It decays to another element 'Y' which is stable.The two elements 'X' and 'Y' were found to be in the ratio 1:7 in a sample of a given rock.The age of the rock is estimated to be: a)100 years b)40 years c)60 years d)80 years

Charges Q,2Q and −Q are given to three concentric conducting spherical shells A,B and C respectively as shown in figure. The ratio of charges on the inner and outer surfaces of shell C will be

Which graph shows the relationship between Xc and f?

A solid sphere of radius R has a volume charge density ρ=ρ0r3 (where ρ0 is a constant and r is the distance from center). At a distance x from its centre (for x &lt; R), the electric field is directly proportional to:

a particle of mass 2 kg is moving along line AB according to y=x-4 with the speed of 4m/s , then angular momentum about O i

A wire carries a steady current of 50 A as shown in the figure. Find the magnetic field caused by a 1 cm segment of this wire at a point P, which is 1 m away.

A system of consists of particles of mass 4 kg placed at (4,0),6 kg placed at (0,−4) and 3 kg placed at (−3,4). How far from the origin must a particle of mass 10 kg be placed so that the moment of inertia of the system about the origin becomes 300 kgm2?

A ball is dropped on the floor from a height of 10 m. It rebounds to a height of 2.5 m. If the ball is in contact with the floor for 0.01 sec, the average acceleration during contact is

31.A charge q is placed just above one of the vertices of the square at a distance 'a' from it. If the side length of the square is 'a', what is the flux through the square?1

Figure below shows a light spring balance connected to two blocks of mass 20 kg each. The graduations in the balance measure the tension in the spring. What is the reading of the balance?

What is the magnitude of electric field intensity due to a short dipole of moment of magnitude 2×10−8 C -m at a point 1 m from the centre of the dipole, when the line joining the point to the centre of the dipole makes an angle of 60∘ with the dipole axis?

A body is projected up with a speed V along the line of greatest slope of an inclined plane of angle of inclination β. If the body collides elastically perpendicular to the inclined plane, find the time after which it crosses through its point of projection after collision ?

A particle is moving rectilinearly so that its acceleration is given as a(m/s2)=3t2+1 Its initial velocity is zero then the velocity of the particle at t=1 s will be

if P represent radiation pressure c represent speed of kight and Q represent radiation energy striking a unit area per second then non zero integers x,y,z such that pxQycz is dimensionless are? 1. x=1 , y=1 , z =-1 2. x =1 , y=-1 , z=1 3. x=1 ,y =1 , z =

Find out the electric force experienced by +5 μC charge at point A(0,5,0) m due to a point charge −25 μC situated at point B(2,8,√12) m.

four particles each having charge q, are placed on the four vertices of a regular pentagon . the dis†an ce of each corner from the centre is a. find the electric field at th centre of pentagon

Light of wavelength λ falls on a metal having work function hcλ0. Photoelectric effect will take place only if

A 20m deep well 3m in diameter is filled with water up to a depth of 14m. How long will a 5hp engine take to empty the well?

A satellite in force-free space sweeps stationary interplanetary dust at a rate of dM/dt=av, whereM is mass and v is the speed of satellite and α is a constant The tangential acceleration ofsatellite is -av^2/2m -av^2 -2av^2/m -av^2/

A body of mass m is moving on a rough horizontal surface. The frictional force acting on it is(a) mg(b) 2mg(c) mg/2(d) Zero

The CFSE for octahedral (CoCl6)4− is 18000Cm−1. The CFSE for tetrahedral (CoCl4)2− will be

X ray or gamma ray which has the most penetrating power and ho

Molar specific heat at constant volume for a non-linear triatomic gas ( neglect vibration of molecules) is:

A particle having zero Reshma and non zero energy and Momentum must travel with a speed

A magnetic needle is kept in a non uniform magnetic field. It experiences:

The time constant of a capacitor is 5sec. If the capacitance is C=100nF and it is charged from zero by a cell of EMF 10V through a resistor. What is the charge on it after 3 seconds?

A disc of mass m is connected to two springs having spring constants k1 and k2 as shown in the figure. Find the time period of oscillation.

A tuning fork vibrating with a sonometer having a wire of length 20 cm produces 5 beats per second the beats frequency does not change if the length of wire is changed to 21cm the frequency of the tuning fork must be

An object has a displacement from position vector \overrightarrow{r_1}=(2\oversetΛ i+3\oversetΛ j)m to \overrightarrow{r_2}=(4\oversetΛ i+6\oversetΛ j)m under a force \overrightarrow F=(3x^2\oversetΛ i+2y\oversetΛ j)N, then work done by the force is (1) 24 J (2) 33 J (3) 83 J (4) 45 J

81. How to calculate moment of inertia of right angled triangle towards the centre and perpendicular to plane??

2.1 g of graphite is burnt in a bomb calorimeter in excess of oxygen at 298K and 1 atmospheric pressure .During the reaction, temperature rises from 298K to 299K. If the heat capacity of the bomb calorimeter is 20.7kJ/K, what is the enthalpy change for the above reaction at 298k and 1 atm?

The moment of force f is equal to 4 ICAP + 5 j cap - 6 k cap at 2,0, -3 about the point 2, - 2, - 2 is given by bhai

A solid sphere of radius R has a volume charge density ρ=ρ0r3 (where ρ0 is a constant and r is the distance from center). At a distance x from its centre (for x < R), the electric field is directly proportional to: