50278 + Interview Questions in Physics

1.	Temperature of an object increases by 40 degrees on the Celsius scale. What are corresponding changes on the Fahrenheit scale and absolute scale?
Answer» Temperature of an object increases by $40$ degrees on the Celsius scale. What are corresponding changes on the Fahrenheit scale and absolute scale?

Discussion

2.	In a SHM, potential energy of a particle at mean position is E1 and kinetic energy is E2, then
Answer» In a SHM, potential energy of a particle at mean position is $E_{1}$ and kinetic energy is $E_{2},$ then

Discussion

3.	A body starts from rest with uniform acceleration and remains in motion for n seconds. If its final velocity after n second is v, then its displacement in the last two seconds will be
Answer» A body starts from rest with uniform acceleration and remains in motion for $n$ seconds. If its final velocity after $n$ second is $v$ , then its displacement in the last two seconds will be

Discussion

4.	A car of mass 2000 kg is moving with a constant speed of 10 ms−1 on a circular path of radius 20 m on a level road. What must be the frictional force between the car and the road so that the car does not slip on the road ?
Answer» A car of mass $2000 k g$ is moving with a constant speed of $10 m s^{- 1}$ on a circular path of radius $20 m$ on a level road. What must be the frictional force between the car and the road so that the car does not slip on the road ?

Discussion

5.	The bob of the pendulum shown in the figure describes an arc of a circle in a vertical plane. If the tension in the cord is 3 times of the weight of the bob for the position shown, the velocity of the bob at this position is
Answer» The bob of the pendulum shown in the figure describes an arc of a circle in a vertical plane. If the tension in the cord is $3$ times of the weight of the bob for the position shown, the velocity of the bob at this position is

Discussion

6.	From figure shown below a series L – C – R circuit connected to a variable frequency 200 V source. L = 5H, C = 80μ F and R = 40Ω. Then the source frequency which drive the circuit at resonance is
Answer» From figure shown below a series L – C – R circuit connected to a variable frequency 200 V source. L = 5H, C = 80 $μ$ F and R = 40 $Ω$ . Then the source frequency which drive the circuit at resonance is

Discussion

7.	A satellite is revolving in a circular orbit at a height ‘h’ from the earth’s surface (radius of earth R ; h<<R). The minimum increase in its orbital velocity required, so that the satellite could escape from the earth’s gravitational field, is close to : (Neglect the effect of atmosphere.)
Answer» A satellite is revolving in a circular orbit at a height ‘h’ from the earth’s surface (radius of earth R ; $h << R$ ). The minimum increase in its orbital velocity required, so that the satellite could escape from the earth’s gravitational field, is close to : (Neglect the effect of atmosphere.)

Discussion

8.	A particle is describing S.H.M with displacement amplitude A. At time t = 0 its speed is half of the maximum speed. At time t = 0 its displacement w.r.t the mean position is
Answer» A particle is describing S.H.M with displacement amplitude A. At time t = 0 its speed is half of the maximum speed. At time t = 0 its displacement w.r.t the mean position is

Discussion

9.	An object is displaced from position vector →r1=(2^i+3^j) m to →r2=(4^i+6^j) m under the action of a force →F=(3x2^i+2y^j) N. Find the work done by this force.
Answer» An object is displaced from position vector ${\to r}_{1} = (2^i + 3^j) m$ to ${\to r}_{2} = (4^i + 6^j) m$ under the action of a force $\to F = (3 x^{2}^i + 2 y^j) N$ . Find the work done by this force.

Discussion

10.	A real object is located at the zero end of a meter stick. A concave mirror located at the 100 cm end of the meter stick forms an image of the object at the 70 cm position. A convex mirror placed at the 60 cm position forms a final image at the 10 cm point. What is the radius of curvature of the convex mirror?
Answer» A real object is located at the zero end of a meter stick. A concave mirror located at the 100 cm end of the meter stick forms an image of the object at the 70 cm position. A convex mirror placed at the 60 cm position forms a final image at the 10 cm point. What is the radius of curvature of the convex mirror?

Discussion

11.	A student measures the distance traversed in free fall of a body initially at rest in a given time. He uses this data to estimate g (the acceleration due to gravity). If the maximum percentage errors in measurement of the distance and the time are e1 and e2 respectively, the percentage error in the estimation of g is
Answer» A student measures the distance traversed in free fall of a body initially at rest in a given time. He uses this data to estimate g (the acceleration due to gravity). If the maximum percentage errors in measurement of the distance and the time are $e_{1}$ and $e_{2}$ respectively, the percentage error in the estimation of $g$ is

Discussion

12.	If x and a stand for distance, then for what value of n in the given equation is dimensionally correct? The equation is ∫dx√a2−xn=sin−1xa
Answer» If $x$ and $a$ stand for distance, then for what value of $n$ in the given equation is dimensionally correct? The equation is $\int \frac{d x}{\sqrt{a^{2} - x^{n}}} = {sin}^{- 1} \frac{x}{a}$

Discussion

13.	The friction coefficient between an athlete's shoes and the ground is 0.90. Suppose Superman wears these shoes and races for 50 m. There is not upper limit on his capacity of running at high speeds. Find the minimum time that he will have to take in completing the 50 m starting from rest.
Answer» The friction coefficient between an athlete's shoes and the ground is 0.90. Suppose Superman wears these shoes and races for 50 m. There is not upper limit on his capacity of running at high speeds. Find the minimum time that he will have to take in completing the 50 m starting from rest.

13.

The friction coefficient between an athlete's shoes and the ground is 0.90. Suppose Superman wears these shoes and races for 50 m. There is not upper limit on his capacity of running at high speeds. Find the minimum time that he will have to take in completing the 50 m starting from rest.

Answer»

The friction coefficient between an athlete's shoes and the ground is 0.90. Suppose Superman wears these shoes and races for 50 m. There is not upper limit on his capacity of running at high speeds.

Find the minimum time that he will have to take in completing the 50 m starting from rest.

Discussion

14.	A boy standing on the viewing platform of the Qutub Minar. He then throws a ball vertically downwards at 2 m/s. If the platform is 72 m above ground, the speed with which the ball hits the ground in (m/s) is
Answer» A boy standing on the viewing platform of the Qutub Minar. He then throws a ball vertically downwards at $2 m/s$ . If the platform is $72 m$ above ground, the speed with which the ball hits the ground in $(m/s)$ is

Discussion

15.	An object is moving in a straight-line path has a velocity of 40 m/s at some instant. After 5 s, its velocity changed to 30 m/s. What is the average acceleration of the ball during this time interval?
Answer» An object is moving in a straight-line path has a velocity of $40 m/s$ at some instant. After $5 s$ , its velocity changed to $30 m/s$ . What is the average acceleration of the ball during this time interval?

Discussion

16.	Capacity of a spherical capacitor is C1 when inner sphere is charged and outer sphere is earthed and C2 when inner sphere is earthed and outer sphere is charged. Thenis (a = radius of inner sphere, b = radius of outer sphere)
Answer» Capacity of a spherical capacitor is C₁ when inner sphere is charged and outer sphere is earthed and C₂ when inner sphere is earthed and outer sphere is charged. Thenis (a = radius of inner sphere, b = radius of outer sphere)

16.

Capacity of a spherical capacitor is C1 when inner sphere is charged and outer sphere is earthed and C2 when inner sphere is earthed and outer sphere is charged. Thenis (a = radius of inner sphere, b = radius of outer sphere)

Answer»

Capacity of a spherical capacitor is C₁ when inner sphere is charged and outer sphere is earthed and C₂ when inner sphere is earthed and outer sphere is charged. Thenis (a = radius of inner sphere, b = radius of outer sphere)

Discussion

17.	Two particles of masses m and 2m moving in opposite direction collides elastically with velocities 2v and v respectively. Find their respective magnitude of velocities after the collision.
Answer» Two particles of masses $m$ and $2 m$ moving in opposite direction collides elastically with velocities $2 v$ and $v$ respectively. Find their respective magnitude of velocities after the collision.

Discussion

18.	A block is being hanged from the ceiling using a string. Find the dimensions of the tension developed in the string.
Answer» A block is being hanged from the ceiling using a string. Find the dimensions of the tension developed in the string.

Discussion

19.	How many MJ of energy is spent when a current of 2 A passes for 10 minutes under a potential of 150 V?
Answer» How many $M J$ of energy is spent when a current of $2 A$ passes for 10 minutes under a potential of $150 V$ ?

Discussion

20.	What will be the reading of spring balance shown in the figure, if it is moving in upward direction with a constant acceleration a=2 m/s2 and an initial velocity v=2 m/s. (Take g=10 m/s2)
Answer» What will be the reading of spring balance shown in the figure, if it is moving in upward direction with a constant acceleration $a = 2 {m/s}^{2}$ and an initial velocity $v = 2 m/s$ . (Take $g = 10 {m/s}^{2}$ )

Discussion

21.	A boy standing on a long railroad car throws a ball straight upwards. The car is moving on the horizontal road with an acceleration of 1 m/s2 and the projection speed in the vertical direction is 9.8 m/s. How far the ball will fall behind the boy(in m)?
Answer» A boy standing on a long railroad car throws a ball straight upwards. The car is moving on the horizontal road with an acceleration of $1 {m/s}^{2}$ and the projection speed in the vertical direction is $9.8 m/s$ . How far the ball will fall behind the boy(in $m$ )?

Discussion

22.	Three sound waves of equal amplitudes have frequencies (v – 1), v, (v + 1). They superimpose to produce beats. The maximum number of beats produced per second will be:
Answer» Three sound waves of equal amplitudes have frequencies (v – 1), v, (v + 1). They superimpose to produce beats. The maximum number of beats produced per second will be:

Discussion

23.	A point charge q0 is placed at a distance r from a point dipole. Force on point charge due to dipole is proportional to
Answer» A point charge $q_{0}$ is placed at a distance $r$ from a point dipole. Force on point charge due to dipole is proportional to

Discussion

24.	The acceleration of a particle increasing linearly with time t is 'bt'. The particle starts from the origin with an initial velocity v0. The distance travelled by the particle in time t will be
Answer» The acceleration of a particle increasing linearly with time t is 'bt'. The particle starts from the origin with an initial velocity v₀. The distance travelled by the particle in time t will be

Discussion

25.	Infinite number of bodies, each of mass 2kg are situated on X-axis at distance 1m, 2m, 4m, 8m and so on, respectively from the origin. The resulting gravitational potential due to this system at the origin will be:
Answer» Infinite number of bodies, each of mass 2kg are situated on X-axis at distance 1m, 2m, 4m, 8m and so on, respectively from the origin. The resulting gravitational potential due to this system at the origin will be:

Discussion

26.	Heat flows through a composite slab, across a temperature difference ΔT as shown below. The depth of the slab is 1 m. The conductivity (K) values are in W/mK. The overall thermal resistance in K/W is (rounded to the nearest integer)
Answer» Heat flows through a composite slab, across a temperature difference $Δ T$ as shown below. The depth of the slab is $1 m$ . The conductivity ( $K$ ) values are in $W/mK$ . The overall thermal resistance in $K/W$ is (rounded to the nearest integer)

Discussion

27.	A small ring P is threaded on a smooth wire bent in the form of a circle of radius a and center O. The wire is rotating with constant angular speed ω about a vertical diameter xy, while the ring remains at rest relative to the wire at a distance a2 from xy. Then ω2 is equal to
Answer» A small ring $P$ is threaded on a smooth wire bent in the form of a circle of radius $a$ and center $O$ . The wire is rotating with constant angular speed $ω$ about a vertical diameter $x y$ , while the ring remains at rest relative to the wire at a distance $\frac{a}{2}$ from $x y$ . Then $ω^{2}$ is equal to

Discussion

28.	If velocity of a particle is v(t)=(9−3t) m/s, the average speed and magnitude of average velocity of the particle in 4 sec respectively are
Answer» If velocity of a particle is $v (t) = (9 - 3 t) m/s$ , the average speed and magnitude of average velocity of the particle in $4 sec$ respectively are

Discussion

29.	A body acted upon by a force of 50 N is displaced through a distance 10 m in a direction making an angle of 60∘ with the force. The work done by the force is (Take W=→F.→S, where W is work done, →F is force and →S is the displacement)
Answer» A body acted upon by a force of $50 N$ is displaced through a distance $10 m$ in a direction making an angle of $60^{\circ}$ with the force. The work done by the force is (Take $W = \to F . \to S$ , where $W$ is work done, $\to F$ is force and $\to S$ is the displacement)

Discussion

30.	R.M.S value of circular current wave, which is varying as shown in the figure in amperes (where a=3√2) is(answer upto two decimals points)
Answer» R.M.S value of circular current wave, which is varying as shown in the figure in amperes (where $a = \frac{3}{\sqrt{2}}$ ) is(answer upto two decimals points)

Discussion

31.	Please tell me a trick to memorize the colour of any complex salts
Answer» Please tell me a trick to memorize the colour of any complex salts

Discussion

32.	Two equal forces are acting at a point with an angle of 60∘between them. If the resultat force is equal to 40√3 N, the magnitude of each force is
Answer» Two equal forces are acting at a point with an angle of $60^{\circ}$ between them. If the resultat force is equal to $40 \sqrt{3} N$ , the magnitude of each force is

Discussion

33.	n drops of liquid each with surface energy E, join to form a single drop. In this process
Answer» n drops of liquid each with surface energy E, join to form a single drop. In this process

Discussion

34.	The FBD of the frame and the person for the figure shown is
Answer» The $F B D$ of the frame and the person for the figure shown is

Discussion

35.	What is a net charge?
Answer» What is a net charge?

Discussion

36.	A spherical ball of radius 5 mm flowing through the glycerin as shown in figure. The velocity of ball at a particular instant is 0.6 m/s. Find the drag force on the ball due to the fluid. Assume that Stoke's law is valid. (Take viscosity of glycerine as 0.950 kg/m-s)
Answer» A spherical ball of radius $5 mm$ flowing through the glycerin as shown in figure. The velocity of ball at a particular instant is $0.6 m/s$ . Find the drag force on the ball due to the fluid. Assume that Stoke's law is valid. (Take viscosity of glycerine as $0.950 kg/m-s$ )

Discussion

37.	The potential function of an electric field is given by V=2x2. Determine strength of the electrostatic field at the point (2 m,0,3 m).
Answer» The potential function of an electric field is given by $V = 2 x^{2} .$ Determine strength of the electrostatic field at the point $(2 m, 0, 3 m) .$

Discussion

38.	Work done by Conservative force is Positive, Can I say Kinetic Energy increases?
Answer» Work done by Conservative force is Positive, Can I say Kinetic Energy increases?

38.

Work done by Conservative force is Positive, Can I say Kinetic Energy increases?

Answer»

Work done by Conservative force is Positive,

Can I say Kinetic Energy increases?

Discussion

39.	Why does the electric field inside dielectric decreases when it is places in am external field ?
Answer» Why does the electric field inside dielectric decreases when it is places in am external field ?

Discussion

40.	Two trains each 500 m long are moving on parallel tracks towards each other at speeds 10 m/s and 15 m/s respectively. In how much time will they pass each other?
Answer» Two trains each 500 m long are moving on parallel tracks towards each other at speeds 10 m/s and 15 m/s respectively. In how much time will they pass each other?

Discussion

41.	Q. A golf ball has a mass of 40g and a speed of 45m/s. If the speed can be measured with an accuracy of 2%, calculate the uncertainty in position. Doubt :- How come 2% of 45 m/s which is the accuracy in velocity be used as uncertainty in velocity in the given solution? If it is wrong, please show the correct one and if the given solution is correct then how come.
Answer» Q. A golf ball has a mass of 40g and a speed of 45m/s. If the speed can be measured with an accuracy of 2%, calculate the uncertainty in position. Doubt :- How come 2% of 45 m/s which is the accuracy in velocity be used as uncertainty in velocity in the given solution? If it is wrong, please show the correct one and if the given solution is correct then how come.

Discussion

42.	An ant moves from A to B. Find the distance (d) and displacement ( s).
Answer» An ant moves from A to B. Find the distance (d) and displacement ( s).

42.

An ant moves from A to B. Find the distance (d) and displacement ( s).

Answer»

An ant moves from A to B. Find the distance (d) and displacement ( s).

Discussion

43.	A body starts with a velocity V and returns to its initial position after t seconds with the same speed along the same line. Acceleration of the particle is?
Answer» A body starts with a velocity V and returns to its initial position after t seconds with the same speed along the same line. Acceleration of the particle is?

Discussion

44.	A spherical metal shell is to be a 15x106 V electrode . The dielectric strength of the gas surrounding the electrode is 5x107V/m . What is the minimum radius of the spherical shell required?
Answer» A spherical metal shell is to be a 15x10⁶V electrode . The dielectric strength of the gas surrounding the electrode is 5x10⁷V/m . What is the minimum radius of the spherical shell required?

Discussion

45.	A stretched string is forced to transmit transverse waves by means of an oscillator coupled to one end. The string has a diameter of 4mm. The amplitude of the oscillation is 10−4m and the frequency is 10 Hz. Tension in the string is 100 N and mass density of wire is 4.2×103 kg/m3 . Find Average energy flow per unit time
Answer» A stretched string is forced to transmit transverse waves by means of an oscillator coupled to one end. The string has a diameter of 4mm. The amplitude of the oscillation is $10^{- 4} m$ and the frequency is 10 Hz. Tension in the string is 100 N and mass density of wire is $4.2 \times 10^{3} k g / m^{3}$ . Find Average energy flow per unit time

Discussion

46.	How to find out ratio of three decimals? For example. 0.075:0.15:0.10
Answer» How to find out ratio of three decimals? For example. 0.075:0.15:0.10

46.

How to find out ratio of three decimals? For example. 0.075:0.15:0.10

Answer»

How to find out ratio of three decimals?

For example. 0.075:0.15:0.10

Discussion

47.	An ammeter and a milliammeter are converted from the galvanometer. Out of the two, Which current measuring instrument has higher resistance?
Answer» An ammeter and a milliammeter are converted from the galvanometer. Out of the two, Which current measuring instrument has higher resistance?

Discussion

48.	A block of mass 3 kg produces an extension of 1 mm in a wire of length 4 m and diameter 4 mm when suspended at one end. The Young's modulus of the material of the wire will be (Assume: g=10 m/s2 and π=3)
Answer» A block of mass $3 kg$ produces an extension of $1 mm$ in a wire of length $4 m$ and diameter $4 mm$ when suspended at one end. The Young's modulus of the material of the wire will be (Assume: $g = 10 {m/s}^{2} and π = 3$ )

Discussion

49.	A given point on the extension of an electric dipole has electric field =E if the dipole is suddenly turned by 90 degrees in clockwise direction electric field at the same point will be
Answer» A given point on the extension of an electric dipole has electric field =E if the dipole is suddenly turned by 90 degrees in clockwise direction electric field at the same point will be

Discussion

50.	When water (viscosity, ηw=0.01 poise) and benzene (viscosity, ηb=0.0065 poise) are allowed to flow through a pipe, it was found that the same amount of liquids are collected in the same time but the pressure drop that caused the flow are different. If the pressure drop in water is 0.015 atm, then the pressure drop in benzene will be
Answer» When water $(viscosity, η_{w} = 0.01 poise)$ and benzene $(viscosity, η_{b} = 0.0065 poise)$ are allowed to flow through a pipe, it was found that the same amount of liquids are collected in the same time but the pressure drop that caused the flow are different. If the pressure drop in water is $0.015 atm$ , then the pressure drop in benzene will be

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Temperature of an object increases by 40 degrees on the Celsius scale. What are corresponding changes on the Fahrenheit scale and absolute scale?

In a SHM, potential energy of a particle at mean position is E1 and kinetic energy is E2, then

A body starts from rest with uniform acceleration and remains in motion for n seconds. If its final velocity after n second is v, then its displacement in the last two seconds will be

A car of mass 2000 kg is moving with a constant speed of 10 ms−1 on a circular path of radius 20 m on a level road. What must be the frictional force between the car and the road so that the car does not slip on the road ?

The bob of the pendulum shown in the figure describes an arc of a circle in a vertical plane. If the tension in the cord is 3 times of the weight of the bob for the position shown, the velocity of the bob at this position is

From figure shown below a series L – C – R circuit connected to a variable frequency 200 V source. L = 5H, C = 80μ F and R = 40Ω. Then the source frequency which drive the circuit at resonance is

A particle is describing S.H.M with displacement amplitude A. At time t = 0 its speed is half of the maximum speed. At time t = 0 its displacement w.r.t the mean position is

An object is displaced from position vector →r1=(2^i+3^j) m to →r2=(4^i+6^j) m under the action of a force →F=(3x2^i+2y^j) N. Find the work done by this force.

If x and a stand for distance, then for what value of n in the given equation is dimensionally correct? The equation is ∫dx√a2−xn=sin−1xa

The friction coefficient between an athlete's shoes and the ground is 0.90. Suppose Superman wears these shoes and races for 50 m. There is not upper limit on his capacity of running at high speeds. Find the minimum time that he will have to take in completing the 50 m starting from rest.

A boy standing on the viewing platform of the Qutub Minar. He then throws a ball vertically downwards at 2 m/s. If the platform is 72 m above ground, the speed with which the ball hits the ground in (m/s) is

An object is moving in a straight-line path has a velocity of 40 m/s at some instant. After 5 s, its velocity changed to 30 m/s. What is the average acceleration of the ball during this time interval?

Capacity of a spherical capacitor is C1 when inner sphere is charged and outer sphere is earthed and C2 when inner sphere is earthed and outer sphere is charged. Thenis (a = radius of inner sphere, b = radius of outer sphere)

Two particles of masses m and 2m moving in opposite direction collides elastically with velocities 2v and v respectively. Find their respective magnitude of velocities after the collision.

A block is being hanged from the ceiling using a string. Find the dimensions of the tension developed in the string.

How many MJ of energy is spent when a current of 2 A passes for 10 minutes under a potential of 150 V?

What will be the reading of spring balance shown in the figure, if it is moving in upward direction with a constant acceleration a=2 m/s2 and an initial velocity v=2 m/s. (Take g=10 m/s2)

A boy standing on a long railroad car throws a ball straight upwards. The car is moving on the horizontal road with an acceleration of 1 m/s2 and the projection speed in the vertical direction is 9.8 m/s. How far the ball will fall behind the boy(in m)?

Three sound waves of equal amplitudes have frequencies (v – 1), v, (v + 1). They superimpose to produce beats. The maximum number of beats produced per second will be:

A point charge q0 is placed at a distance r from a point dipole. Force on point charge due to dipole is proportional to

The acceleration of a particle increasing linearly with time t is 'bt'. The particle starts from the origin with an initial velocity v0. The distance travelled by the particle in time t will be

Infinite number of bodies, each of mass 2kg are situated on X-axis at distance 1m, 2m, 4m, 8m and so on, respectively from the origin. The resulting gravitational potential due to this system at the origin will be:

Heat flows through a composite slab, across a temperature difference ΔT as shown below. The depth of the slab is 1 m. The conductivity (K) values are in W/mK. The overall thermal resistance in K/W is (rounded to the nearest integer)

A small ring P is threaded on a smooth wire bent in the form of a circle of radius a and center O. The wire is rotating with constant angular speed ω about a vertical diameter xy, while the ring remains at rest relative to the wire at a distance a2 from xy. Then ω2 is equal to

If velocity of a particle is v(t)=(9−3t) m/s, the average speed and magnitude of average velocity of the particle in 4 sec respectively are

A body acted upon by a force of 50 N is displaced through a distance 10 m in a direction making an angle of 60∘ with the force. The work done by the force is (Take W=→F.→S, where W is work done, →F is force and →S is the displacement)

R.M.S value of circular current wave, which is varying as shown in the figure in amperes (where a=3√2) is(answer upto two decimals points)

Please tell me a trick to memorize the colour of any complex salts

Two equal forces are acting at a point with an angle of 60∘between them. If the resultat force is equal to 40√3 N, the magnitude of each force is

n drops of liquid each with surface energy E, join to form a single drop. In this process

The FBD of the frame and the person for the figure shown is

What is a net charge?

A spherical ball of radius 5 mm flowing through the glycerin as shown in figure. The velocity of ball at a particular instant is 0.6 m/s. Find the drag force on the ball due to the fluid. Assume that Stoke's law is valid. (Take viscosity of glycerine as 0.950 kg/m-s)

The potential function of an electric field is given by V=2x2. Determine strength of the electrostatic field at the point (2 m,0,3 m).

Work done by Conservative force is Positive, Can I say Kinetic Energy increases?

Why does the electric field inside dielectric decreases when it is places in am external field ?

Two trains each 500 m long are moving on parallel tracks towards each other at speeds 10 m/s and 15 m/s respectively. In how much time will they pass each other?

An ant moves from A to B. Find the distance (d) and displacement ( s).

A body starts with a velocity V and returns to its initial position after t seconds with the same speed along the same line. Acceleration of the particle is?

A spherical metal shell is to be a 15x106 V electrode . The dielectric strength of the gas surrounding the electrode is 5x107V/m . What is the minimum radius of the spherical shell required?

How to find out ratio of three decimals? For example. 0.075:0.15:0.10

An ammeter and a milliammeter are converted from the galvanometer. Out of the two, Which current measuring instrument has higher resistance?

A block of mass 3 kg produces an extension of 1 mm in a wire of length 4 m and diameter 4 mm when suspended at one end. The Young's modulus of the material of the wire will be (Assume: g=10 m/s2 and π=3)

A given point on the extension of an electric dipole has electric field =E if the dipole is suddenly turned by 90 degrees in clockwise direction electric field at the same point will be