50278 + Interview Questions in Physics Page 46 InterviewSolution

2251.	A particle located in a one - dimentional potential field has its potential energy functions as U(x) = ax4−bx2, where a and b are positive constants. The position of equilibrium x corresponds to
Answer» A particle located in a one - dimentional potential field has its potential energy functions as U(x) = $\frac{a}{x^{4}} - \frac{b}{x^{2}}$ , where a and b are positive constants. The position of equilibrium x corresponds to

Discussion

2252.	Two blocks of the same metal having same mass and at temperature T1 and T2 respectively, are bought in contact with each other and allowed to attain thermal equilibrium at constant pressure. The change in entropy, ΔS for this process is
Answer» Two blocks of the same metal having same mass and at temperature $T_{1}$ and $T_{2}$ respectively, are bought in contact with each other and allowed to attain thermal equilibrium at constant pressure. The change in entropy, $Δ S$ for this process is

Discussion

2253.	Which of the given relations is correct {C is speed of light}
Answer» Which of the given relations is correct {C is speed of light}

Discussion

2254.	Moment of a force of magnitude 10 N acting at a point (2,0,1) about a point (2,1,-1) is
Answer» Moment of a force of magnitude 10 N acting at a point (2,0,1) about a point (2,1,-1) is

Discussion

2255.	A photocopier is a machine that makes paper copies of documents and other visual images quickly and cheaply. Most current photocopiers use a technology in which toner particles are positively charged and then transfer them onto paper in the form of an image/letters. What charge should the paper possess for this process to happen?
Answer» A photocopier is a machine that makes paper copies of documents and other visual images quickly and cheaply. Most current photocopiers use a technology in which toner particles are positively charged and then transfer them onto paper in the form of an image/letters. What charge should the paper possess for this process to happen?

2255.

A photocopier is a machine that makes paper copies of documents and other visual images quickly and cheaply. Most current photocopiers use a technology in which toner particles are positively charged and then transfer them onto paper in the form of an image/letters. What charge should the paper possess for this process to happen?

Answer»

A photocopier is a machine that makes paper copies of documents and other visual images quickly and cheaply. Most current photocopiers use a technology in which toner particles are positively charged and then transfer them onto paper in the form of an image/letters.

What charge should the paper possess for this process to happen?

Discussion

2256.	An orthogonal matrix is
Answer» An orthogonal matrix is

Discussion

2257.	A square wire loop of 10.0 cm side lies at right angles to a uniform magnetic field of 20 T. A 10 V light bulb is in a series with the loop as shown in the fig. The magnetic field is decreasing steadily to zero over a time interval Δt. The bulb will shine with full brightness if Δt is equal to
Answer» A square wire loop of $10.0 cm$ side lies at right angles to a uniform magnetic field of $20 T$ . A $10 V$ light bulb is in a series with the loop as shown in the fig. The magnetic field is decreasing steadily to zero over a time interval $Δ t$ . The bulb will shine with full brightness if $Δ t$ is equal to

Discussion

2258.	A man of mass 50 kg jumps on a car from a tower as shown in the figure.Find the final velocity of the car if the weight of the car is 150 kg and is initially moving with a velocity of 60 m/s.
Answer» A man of mass $50 kg$ jumps on a car from a tower as shown in the figure. Find the final velocity of the car if the weight of the car is $150 kg$ and is initially moving with a velocity of $60 m/s$ .

Discussion

2259.	Two rods OA and OB of equal lengths and masses are lying in the xy plane as shown in figure. Let Ix,Iy and Iz be the moments of inertia of both the rods about x,y and z axis respectively. Then,
Answer» Two rods $OA$ and $OB$ of equal lengths and masses are lying in the $x y$ plane as shown in figure. Let $I_{x}, I_{y}$ and $I_{z}$ be the moments of inertia of both the rods about $x, y$ and $z$ axis respectively. Then,

Discussion

2260.	113.What is equivalent spring constant for a) two springs in series 2)two springs in parallel
Answer» 113.What is equivalent spring constant for a) two springs in series 2)two springs in parallel

Discussion

2261.	The flow speeds of air on the lower and upper surfaces of the wing of an aeroplane are v and √2v respectively. The density of air is ρ and surface area of wing is A. The dynamic lift on the wing is:
Answer» The flow speeds of air on the lower and upper surfaces of the wing of an aeroplane are $v$ and $\sqrt{2} v$ respectively. The density of air is $ρ$ and surface area of wing is $A$ . The dynamic lift on the wing is:

Discussion

2262.	Find the velocity when KE=PE of a body undergoing SHM. Given, amplitude =x0 and angular frequency is ω. Also, how many times in a cycle is KE=PE ?
Answer» Find the velocity when $K E = P E$ of a body undergoing SHM. Given, amplitude $= x_{0}$ and angular frequency is $ω$ . Also, how many times in a cycle is $K E = P E$ ?

Discussion

2263.	If \|→A×→B\|=√3 →A.→B , then value of \|→A+→B\| is
Answer» If $\| \to A \times \to B \| = \sqrt{3} \to A . \to B$ , then value of $\| \to A + \to B \|$ is

Discussion

2264.	52 A body thrown vertically up from the ground passes theheight of 10.2 m twice in an interval of 10 s. What was itsinitial velocity?(a) 52 ms(b) 61ms(c) 45 ms(d) 26 ms
Answer» 52 A body thrown vertically up from the ground passes theheight of 10.2 m twice in an interval of 10 s. What was itsinitial velocity?(a) 52 ms(b) 61ms(c) 45 ms(d) 26 ms

Discussion

2265.	A charge particle (qm=1inSIunit) moving with velocity v enters inside a uniform magnetic field →B=2(−^k) T perpendicular to the field as shown. Find average velocity of charge particle till the time it remains inside the magnetic field.v वेग से गतिशील एक आवेश कण (SIek=desaqm=1 ) एकसमान चुम्बकीय क्षेत्र →B=2(−^k) T के अन्दर दर्शाए अनुसार क्षेत्र के लम्बवत् प्रवेश करता है। आवेश कण द्वारा चुम्बकीय क्षेत्र के अन्दर रहने के समय तक इसका औसत वेग ज्ञात कीजिए।
Answer» A charge particle $(\frac{q}{m} = 1 in SI unit)$ moving with velocity v enters inside a uniform magnetic field $\to B = 2 (-^k)$ T perpendicular to the field as shown. Find average velocity of charge particle till the time it remains inside the magnetic field. v वेग से गतिशील एक आवेश कण $(SI e k = d e s a \frac{q}{m} = 1)$ एकसमान चुम्बकीय क्षेत्र $\to B = 2 (-^k)$ T के अन्दर दर्शाए अनुसार क्षेत्र के लम्बवत् प्रवेश करता है। आवेश कण द्वारा चुम्बकीय क्षेत्र के अन्दर रहने के समय तक इसका औसत वेग ज्ञात कीजिए।

Discussion

2266.	What is the value of shunt which passes 10% of the main current through a galvanometer of 99 Ω ?
Answer» What is the value of shunt which passes $10 %$ of the main current through a galvanometer of $99 Ω$ ?

Discussion

2267.	(क) तुम्हारे विचार से यह तेंदुए का बच्चा बस के पास कहाँ से पहुँचा होगा?(ख) कुछ लोग लाठी और कुल्हाड़ी लेकर क्यों पहुँच गए थे? तुम होते तो क्या करते?
Answer» (क) तुम्हारे विचार से यह तेंदुए का बच्चा बस के पास कहाँ से पहुँचा होगा? (ख) कुछ लोग लाठी और कुल्हाड़ी लेकर क्यों पहुँच गए थे? तुम होते तो क्या करते?

2267.

(क) तुम्हारे विचार से यह तेंदुए का बच्चा बस के पास कहाँ से पहुँचा होगा?(ख) कुछ लोग लाठी और कुल्हाड़ी लेकर क्यों पहुँच गए थे? तुम होते तो क्या करते?

Answer»

(क) तुम्हारे विचार से यह तेंदुए का बच्चा बस के पास कहाँ से पहुँचा होगा?

(ख) कुछ लोग लाठी और कुल्हाड़ी लेकर क्यों पहुँच गए थे? तुम होते तो क्या करते?

Discussion

2268.	A beam with four 32 mm bars as main tension steel has two of its bars symmetrically bent at the ends of the beam at 45∘. The design shear force (in kN) to be resisted by the stirrups, if the factored shear force at critical section is 420 kN, is Assumeb=350mm,d=550,fck=25 andfy=415N/mm2,τcmax=3.1N/mm2,τc=0.6N/mm2152.075
Answer» A beam with four 32 mm bars as main tension steel has two of its bars symmetrically bent at the ends of the beam at $45^{\circ}$ . The design shear force (in kN) to be resisted by the stirrups, if the factored shear force at critical section is 420 kN, is Assume $b = 350 m m, d = 550, f_{c k} = 25 a n d f_{y} = 415 N / m m^{2}, τ_{c m a x} = 3.1 N / m m^{2}, τ_{c} = 0.6 N / m m^{2}$ 152.075

Discussion

2269.	Which of the following is a scalar quantity
Answer» Which of the following is a scalar quantity

Discussion

2270.	A rubber cord has a cross-sectional area 1 mm2 and total unstretched length 10.0 cm. It is stretched to 12.0 cm and then released to project a missile of mass 5.0 g. Taking Young's modulus Y for rubber as 5.0×108 N/m2. The velocity of projection is _______ms−1.
Answer» A rubber cord has a cross-sectional area $1 {mm}^{2}$ and total unstretched length $10.0 cm$ . It is stretched to $12.0 cm$ and then released to project a missile of mass $5.0 g$ . Taking Young's modulus $Y$ for rubber as $5.0 \times 10^{8} {N/m}^{2}$ . The velocity of projection is _______ ${ms}^{- 1}$ .

Discussion

2271.	Two bodies of different masses ma and mb are dropped from two different heights, a and b respectively. The ratio of times taken by the two to drop through these distances is:
Answer» Two bodies of different masses $m_{a}$ and $m_{b}$ are dropped from two different heights, $a$ and $b$ respectively. The ratio of times taken by the two to drop through these distances is:

Discussion

2272.	If α=1∫0(e9x+3tan−1x)(12+9x21+x2)dx, where tan−1x takes only principle values, then the value of (ln\|1+α\|−3π4) is
Answer» If $α = 1 \int 0 (e^{9 x + 3 {tan}^{- 1} x}) (\frac{12 + 9 x^{2}}{1 + x^{2}}) d x$ , where ${tan}^{- 1} x$ takes only principle values, then the value of $(ln \| 1 + α \| - \frac{3 π}{4})$ is

Discussion

2273.	A block of mass 10 kg is at rest on a rough horizontal surface. A force of 40 N is applied on it as shown in figure. The acceleration of the block is: (Take g=10 m/s2)
Answer» A block of mass $10 kg$ is at rest on a rough horizontal surface. A force of $40 N$ is applied on it as shown in figure. The acceleration of the block is: (Take $g = 10 {m/s}^{2}$ )

Discussion

2274.	A body of mass 2 kg initially at rest moves under the action of an applied horizontal force of 7 N on a table with coefficient of kinetic friction μk=0.1.Calculate the work done by kinetic friction in 10 sec (g=9.8 m/s2)
Answer» A body of mass $2 kg$ initially at rest moves under the action of an applied horizontal force of $7 N$ on a table with coefficient of kinetic friction $μ_{k} = 0.1$ . Calculate the work done by kinetic friction in $10 sec (g = 9.8 {m/s}^{2})$

Discussion

2275.	17.For the same cross–sectional area same length, same material and for a given load the ratio of depression for the beam of a square cross-section and circular-section is :- Options 1. 3 : π 2. π : 3 3. 1 : 1 4. 1 : π
Answer» 17.For the same cross–sectional area same length, same material and for a given load the ratio of depression for the beam of a square cross-section and circular-section is :- Options 1. 3 : π 2. π : 3 3. 1 : 1 4. 1 : π

Discussion

2276.	How to find gravitational potential at a centre of the earth,at the surface of the earth is zero
Answer» How to find gravitational potential at a centre of the earth,at the surface of the earth is zero

Discussion

2277.	A disc is rotating with an angular velocity ωo. A constant retarding torque is applied on it to stop the disc. The angular velocity becomes ωo2 after n rotations. How many more rotations will it make before coming to rest?
Answer» A disc is rotating with an angular velocity $ω_{o}$ . A constant retarding torque is applied on it to stop the disc. The angular velocity becomes $\frac{ω_{o}}{2}$ after $n$ rotations. How many more rotations will it make before coming to rest?

Discussion

2278.	Two points P and Q are diametrically opposite on a disc of radius R. A particle at point P has linear velocity v as shown in figure. Find the angular speed of particle wrt an axis passing through Q and perpendicular to plane of the disc.
Answer» Two points $P$ and $Q$ are diametrically opposite on a disc of radius $R$ . A particle at point $P$ has linear velocity $v$ as shown in figure. Find the angular speed of particle wrt an axis passing through $Q$ and perpendicular to plane of the disc.

Discussion

2279.	The displacement current is given by
Answer» The displacement current is given by

Discussion

2280.	A certain material has refractive indices 1.56, 1.60 and 1.68 for red, yellow and violet light respectively. (a) Calculate the dispersive power. (b) Find the angular dispersion produced by a thin prism of angle 6∘ made of this material.
Answer» A certain material has refractive indices 1.56, 1.60 and 1.68 for red, yellow and violet light respectively. (a) Calculate the dispersive power. (b) Find the angular dispersion produced by a thin prism of angle $6^{\circ}$ made of this material.

Discussion

2281.	The velocity- time graph of a body is shown in the given figure. The body has maximum acceleration during the interval.
Answer» The velocity- time graph of a body is shown in the given figure. The body has maximum acceleration during the interval.

Discussion

2282.	From where do elecrons get energy to revolve around nucleus?
Answer» From where do elecrons get energy to revolve around nucleus?

Discussion

2283.	If a circular current carrying coil has radius 1 m, then at what dis†an ce from the centre of the coil on the axis the magnetic induction is th of its value at the centre of the coil?
Answer» If a circular current carrying coil has radius 1 m, then at what dis†an ce from the centre of the coil on the axis the magnetic induction is th of its value at the centre of the coil?

Discussion

2284.	2.A solid sphere and a disc of same mass are released from the top of an inclined plane. Find the ratio of times of descent if friction is not sufficient for pure rolling (assume same coefficient of friction for both).
Answer» 2.A solid sphere and a disc of same mass are released from the top of an inclined plane. Find the ratio of times of descent if friction is not sufficient for pure rolling (assume same coefficient of friction for both).

Discussion

2285.	The following configuration of gate is equivalent to
Answer» The following configuration of gate is equivalent to

Discussion

2286.	number of significant figures in 510^3 and 5.0010^3.
Answer» number of significant figures in 510^3 and 5.0010^3.

Discussion

2287.	A spotlight S rotates in a horizontal plane with a constant angular velocity of 0.1 rad s−1 The spot of light P moves along the wall at a distance 3 m. What is the velocity of spot P when θ=45∘ ?
Answer» A spotlight $S$ rotates in a horizontal plane with a constant angular velocity of $0.1 r a d s^{- 1}$ The spot of light $P$ moves along the wall at a distance $3 m$ . What is the velocity of spot $P$ when $θ = 45^{\circ}$ ?

Discussion

2288.	A rigid body rotates about a fixed axis with variable angular velocity equal to (α–βt) at the time t where α, β are constants. The angle through which it rotates before it stops is
Answer» A rigid body rotates about a fixed axis with variable angular velocity equal to $(α - β t)$ at the time t where $α, β$ are constants. The angle through which it rotates before it stops is

Discussion

2289.	Both the diodes used in the circuit shown are assumed to be ideal and have negligible resistance, when these are forward biased. Built-in potential in each diode is 0.7 V. For the input voltages shown in the figure, the voltage (in Volts) at point A is .
Answer» Both the diodes used in the circuit shown are assumed to be ideal and have negligible resistance, when these are forward biased. Built-in potential in each diode is $0.7 V$ . For the input voltages shown in the figure, the voltage (in Volts) at point $A$ is .

Discussion

2290.	A fully charged capacitor has a capacitance ‘C’. It is discharged through a small coil of resistance wire embedded in a thermally insulated block of specific heat capacity ‘s’ and mass ‘m’. If the temperature of the block is raised by ‘∆T’,the potential difference ‘V’ across the capacitance is
Answer» A fully charged capacitor has a capacitance ‘C’. It is discharged through a small coil of resistance wire embedded in a thermally insulated block of specific heat capacity ‘s’ and mass ‘m’. If the temperature of the block is raised by ‘∆T’,the potential difference ‘V’ across the capacitance is

Discussion

2291.	What does the slope of momentum- Velocity graph give?
Answer» What does the slope of momentum- Velocity graph give?

Discussion

2292.	An unlabelled analog clock is kept in front of the mirror. Actual time on the clock is 4 hr 20 minutes 15 sec. What will be the time in the mirror image of the same clock?
Answer» An unlabelled analog clock is kept in front of the mirror. Actual time on the clock is $4 hr 20 minutes 15 sec$ . What will be the time in the mirror image of the same clock?

Discussion

2293.	A curve in a road forms an arc of radius 800 m If the road is 39.2 m wide, calculate the safe speed for turning, if the outer edge of the road is 0.5 m higher than the inner edge. Take g=9.8 m/s2.
Answer» A curve in a road forms an arc of radius $800 m$ If the road is $39.2 m$ wide, calculate the safe speed for turning, if the outer edge of the road is $0.5 m$ higher than the inner edge. Take $g = 9.8 {m/s}^{2}$ .

Discussion

2294.	Are mechanical waves and progressive waves sam? If not then what are progressive waves?
Answer» Are mechanical waves and progressive waves sam? If not then what are progressive waves?

Discussion

2295.	In a liquid with density 1300 kgm3, longitudinal waves with frequency 400 Hz are found to have wavelength 8.00 m. Calculate the bulk modulus of the liquid.
Answer» In a liquid with density $1300 \frac{k g}{m^{3}}$ , longitudinal waves with frequency 400 Hz are found to have wavelength 8.00 m. Calculate the bulk modulus of the liquid.

Discussion

2296.	For the circuit shown in the figure, the potential difference across each of the four batteries B1, B2, B3 and B4 respectively will be:
Answer» For the circuit shown in the figure, the potential difference across each of the four batteries $B_{1}, B_{2}, B_{3}$ and $B_{4}$ respectively will be:

Discussion

2297.	A plank of mass 5 kg is placed on a frictionless horizontal plane. Further a block of mass 1 kg is placed over the plank. A massless spring of natural length 2 m is fixed to the plank by its one end. The other end of spring is compressed by the block by half of spring's natural length. The system is now released from the rest, velocity of the plank when block leaves the plank is[Assume, there is no friction between the two blocks]
Answer» A plank of mass $5 kg$ is placed on a frictionless horizontal plane. Further a block of mass $1 kg$ is placed over the plank. A massless spring of natural length $2 m$ is fixed to the plank by its one end. The other end of spring is compressed by the block by half of spring's natural length. The system is now released from the rest, velocity of the plank when block leaves the plank is [Assume, there is no friction between the two blocks]

Discussion

2298.	The source S1 is at rest. The observer and the source S2 are moving toward S1 as shown in the figure. The beat frequency heard by the observer if both the source have the frequency of 120 Hz is (speed of sound is 330 m/s)
Answer» The source $S_{1}$ is at rest. The observer and the source $S_{2}$ are moving toward $S_{1}$ as shown in the figure. The beat frequency heard by the observer if both the source have the frequency of $120 H z$ is (speed of sound is $330 m / s$ )

Discussion

2299.	A capacitor is charged to 200 volt has 0.1 coulomb charge when it is discharged energy will be
Answer» A capacitor is charged to 200 volt has 0.1 coulomb charge when it is discharged energy will be

Discussion

2300.	In the figure a carbon resistor has band of different colours on its body. The resistance of the following body is
Answer» In the figure a carbon resistor has band of different colours on its body. The resistance of the following body is

Discussion

Explore topic-wise InterviewSolutions in .

A particle located in a one - dimentional potential field has its potential energy functions as U(x) = ax4−bx2, where a and b are positive constants. The position of equilibrium x corresponds to

Two blocks of the same metal having same mass and at temperature T1 and T2 respectively, are bought in contact with each other and allowed to attain thermal equilibrium at constant pressure. The change in entropy, ΔS for this process is

Which of the given relations is correct {C is speed of light}

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A square wire loop of 10.0 cm side lies at right angles to a uniform magnetic field of 20 T. A 10 V light bulb is in a series with the loop as shown in the fig. The magnetic field is decreasing steadily to zero over a time interval Δt. The bulb will shine with full brightness if Δt is equal to

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113.What is equivalent spring constant for a) two springs in series 2)two springs in parallel

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52 A body thrown vertically up from the ground passes theheight of 10.2 m twice in an interval of 10 s. What was itsinitial velocity?(a) 52 ms(b) 61ms(c) 45 ms(d) 26 ms

What is the value of shunt which passes 10% of the main current through a galvanometer of 99 Ω ?

Which of the following is a scalar quantity

A rubber cord has a cross-sectional area 1 mm2 and total unstretched length 10.0 cm. It is stretched to 12.0 cm and then released to project a missile of mass 5.0 g. Taking Young's modulus Y for rubber as 5.0×108 N/m2. The velocity of projection is _______ms−1.

Two bodies of different masses ma and mb are dropped from two different heights, a and b respectively. The ratio of times taken by the two to drop through these distances is:

If α=1∫0(e9x+3tan−1x)(12+9x21+x2)dx, where tan−1x takes only principle values, then the value of (ln|1+α|−3π4) is

A block of mass 10 kg is at rest on a rough horizontal surface. A force of 40 N is applied on it as shown in figure. The acceleration of the block is: (Take g=10 m/s2)

A body of mass 2 kg initially at rest moves under the action of an applied horizontal force of 7 N on a table with coefficient of kinetic friction μk=0.1.Calculate the work done by kinetic friction in 10 sec (g=9.8 m/s2)

17.For the same cross–sectional area same length, same material and for a given load the ratio of depression for the beam of a square cross-section and circular-section is :- Options 1. 3 : π 2. π : 3 3. 1 : 1 4. 1 : π

How to find gravitational potential at a centre of the earth,at the surface of the earth is zero

A disc is rotating with an angular velocity ωo. A constant retarding torque is applied on it to stop the disc. The angular velocity becomes ωo2 after n rotations. How many more rotations will it make before coming to rest?

Two points P and Q are diametrically opposite on a disc of radius R. A particle at point P has linear velocity v as shown in figure. Find the angular speed of particle wrt an axis passing through Q and perpendicular to plane of the disc.

The displacement current is given by

A certain material has refractive indices 1.56, 1.60 and 1.68 for red, yellow and violet light respectively. (a) Calculate the dispersive power. (b) Find the angular dispersion produced by a thin prism of angle 6∘ made of this material.

The velocity- time graph of a body is shown in the given figure. The body has maximum acceleration during the interval.

From where do elecrons get energy to revolve around nucleus?

If a circular current carrying coil has radius 1 m, then at what dis†an ce from the centre of the coil on the axis the magnetic induction is th of its value at the centre of the coil?

2.A solid sphere and a disc of same mass are released from the top of an inclined plane. Find the ratio of times of descent if friction is not sufficient for pure rolling (assume same coefficient of friction for both).

The following configuration of gate is equivalent to

number of significant figures in 5*10^3 and 5.00*10^3.

A spotlight S rotates in a horizontal plane with a constant angular velocity of 0.1 rad s−1 The spot of light P moves along the wall at a distance 3 m. What is the velocity of spot P when θ=45∘ ?

A rigid body rotates about a fixed axis with variable angular velocity equal to (α–βt) at the time t where α, β are constants. The angle through which it rotates before it stops is

Both the diodes used in the circuit shown are assumed to be ideal and have negligible resistance, when these are forward biased. Built-in potential in each diode is 0.7 V. For the input voltages shown in the figure, the voltage (in Volts) at point A is .

What does the slope of momentum- Velocity graph give?

An unlabelled analog clock is kept in front of the mirror. Actual time on the clock is 4 hr 20 minutes 15 sec. What will be the time in the mirror image of the same clock?

A curve in a road forms an arc of radius 800 m If the road is 39.2 m wide, calculate the safe speed for turning, if the outer edge of the road is 0.5 m higher than the inner edge. Take g=9.8 m/s2.

Are mechanical waves and progressive waves sam? If not then what are progressive waves?

In a liquid with density 1300 kgm3, longitudinal waves with frequency 400 Hz are found to have wavelength 8.00 m. Calculate the bulk modulus of the liquid.

For the circuit shown in the figure, the potential difference across each of the four batteries B1, B2, B3 and B4 respectively will be:

The source S1 is at rest. The observer and the source S2 are moving toward S1 as shown in the figure. The beat frequency heard by the observer if both the source have the frequency of 120 Hz is (speed of sound is 330 m/s)

A capacitor is charged to 200 volt has 0.1 coulomb charge when it is discharged energy will be

In the figure a carbon resistor has band of different colours on its body. The resistance of the following body is

number of significant figures in 510^3 and 5.0010^3.