16569 + Interview Questions in Physics

1.	Statement 1: When a white light ray passes through a prism it disperses into seven different colours, and this phenomenon is called dispersion.Statement 2: Refraction depends upon the wavelength of light and since different colours have different wavelengths, they are refracted at a different angle.
Answer» Statement 1: When a white light ray passes through a prism it disperses into seven different colours, and this phenomenon is called dispersion. Statement 2: Refraction depends upon the wavelength of light and since different colours have different wavelengths, they are refracted at a different angle.

1.

Statement 1: When a white light ray passes through a prism it disperses into seven different colours, and this phenomenon is called dispersion.Statement 2: Refraction depends upon the wavelength of light and since different colours have different wavelengths, they are refracted at a different angle.

Answer»

Statement 1: When a white light ray passes through a prism it disperses into seven different colours, and this phenomenon is called dispersion.

Statement 2: Refraction depends upon the wavelength of light and since different colours have different wavelengths, they are refracted at a different angle.

Discussion

2.	What is the maximum deviation in refraction of light through a prism
Answer» What is the maximum deviation in refraction of light through a prism

Discussion

3.

oc - to - pus el - e - phant butt - er - fly kang - ga - roo

Answer»

oc - to - pus	el - e - phant
butt - er - fly	kang - ga - roo

Discussion

4.	A: the Apparent weight of a body in an elevator moving with some downward acceleration is less than the actual weight of a body R: the part of the weight is spent in producing downward acceleration when body is in elevator
Answer» A: the Apparent weight of a body in an elevator moving with some downward acceleration is less than the actual weight of a body R: the part of the weight is spent in producing downward acceleration when body is in elevator

Discussion

5.	Assertion: The resolving power of a telescope is more if the diameter of the objective lens is more. Reason Objective lens of large diameter collectsmore light.
Answer» Assertion: The resolving power of a telescope is more if the diameter of the objective lens is more. Reason Objective lens of large diameter collectsmore light.

Discussion

6.	23.An object O is placed at a distance x from the focus of a convex lens and its image I is formed at a distance x' from the other focus as shown in the figure. The distance x, x' satisfy the relation (1) F = xx' (2) F = (x+x')/2 (3) 2F greater than equal to x+x' (4) 2F less than equal to x+x'
Answer» 23.An object O is placed at a distance x from the focus of a convex lens and its image I is formed at a distance x' from the other focus as shown in the figure. The distance x, x' satisfy the relation (1) F = xx' (2) F = (x+x')/2 (3) 2F greater than equal to x+x' (4) 2F less than equal to x+x'

Discussion

7.	20. figure shows four points A,B,C and D in uniform electric field E. the lines AB and CD are perpendicular and BC and AD are parallel to the field lines. if Va,Vb,Vc and Vd are electric potential at A,B,C and D. choose the correct option. (1) Va=Vb=Vc=Vd (2) (Va=Vb)>(Vc=Vd) (3) (Va=Vb)Vb=Vc>Vd
Answer» 20. figure shows four points A,B,C and D in uniform electric field E. the lines AB and CD are perpendicular and BC and AD are parallel to the field lines. if Va,Vb,Vc and Vd are electric potential at A,B,C and D. choose the correct option. (1) Va=Vb=Vc=Vd (2) (Va=Vb)>(Vc=Vd) (3) (Va=Vb)Vb=Vc>Vd

Discussion

8.	Using a horizontal force of 200 N, we intend to move a wooden cabinet across a floor at a constant velocity. What is the friction force that will be exerted on the cabinet?
Answer» Using a horizontal force of 200 N, we intend to move a wooden cabinet across a floor at a constant velocity. What is the friction force that will be exerted on the cabinet?

Discussion

9.	The circuit given below consists of cells with their internal resistance(iii) If the polarity of cell of 4 V is reversed, the equivalent emf between the terminals A and B is
Answer» The circuit given below consists of cells with their internal resistance $(i i i)$ If the polarity of cell of $4 V$ is reversed, the equivalent emf between the terminals $A$ and $B$ is

Discussion

10.	Four identical cells of emf 1.5 V each were connected in four different ways as shown below:The potential difference between the points X and Y would be equal to 6.0 V in case/cases:(1) A and B(2) A and C(3) A and D(4) A only
Answer» Four identical cells of emf 1.5 V each were connected in four different ways as shown below: The potential difference between the points X and Y would be equal to 6.0 V in case/cases: (1) A and B (2) A and C (3) A and D (4) A only

Discussion

11.	The entire range of wavelength is called ___.
Answer» The entire range of wavelength is called ___.

Discussion

12.	Ram is pumping 100 metallic charged spheres one by one in a tube whose ends are maintained at a potential difference of 10 V. The work done in pumping these spheres is 50 J. Find the charge on each sphere.
Answer» Ram is pumping $100$ metallic charged spheres one by one in a tube whose ends are maintained at a potential difference of $10 V$ . The work done in pumping these spheres is $50 J$ . Find the charge on each sphere.

Discussion

13.	The value of A for a neutral atom is 25 and Z is 12. Then, the number of protons and neutrons in the atom areand respectively.
Answer» The value of A for a neutral atom is 25 and Z is 12. Then, the number of protons and neutrons in the atom areand respectively.

Discussion

14.	7. A long thin carpet is laid on the floor. One enti of the carpet is bent back and then pulled backwards with constant velocity v# 4 ms just above the carpet, the remaining part of carpet remains at rest on the foor The velocity of instantaneous centre of mass of the moving part of carpet is 4 m/s TTITITTIIIT7 (1) 3/4 m/s (3) 2 m/s (2) 413 m/s (4) 3 m/s
Answer» 7. A long thin carpet is laid on the floor. One enti of the carpet is bent back and then pulled backwards with constant velocity v# 4 ms just above the carpet, the remaining part of carpet remains at rest on the foor The velocity of instantaneous centre of mass of the moving part of carpet is 4 m/s TTITITTIIIT7 (1) 3/4 m/s (3) 2 m/s (2) 413 m/s (4) 3 m/s

Discussion

15.	Derivation of mirror formula.
Answer» Derivation of mirror formula.

Discussion

16.	What are biomass fuels?
Answer» What are biomass fuels?

Discussion

17.	A bulb of (220 V, 60 W) is operated on 110 V supply then power developed in it is
Answer» A bulb of (220 V, 60 W) is operated on 110 V supply then power developed in it is

Discussion

18.	Question 4 You are given kerosene, turpentine and water. In which of these does the light travel fastest? Use the information given in the table. Material mediumRefractive indexMaterial mediumRefractive indexAir1.0003Canada Balsam1.53Ice1.31−−Water1.33Rock salt1.54Alcohol1.36−−Kerosene1.44Carbon disulphide1.63Fused quartz1.46Dense flint glass1.65Turpentine oil1.47Ruby1.71Benzene1.50Sapphire1.77Crown glass1.52Diamond2.42
Answer» Question 4 You are given kerosene, turpentine and water. In which of these does the light travel fastest? Use the information given in the table. $Material mediumRefractive indexMaterial mediumRefractive indexAir1.0003Canada Balsam1.53Ice1.31−−Water1.33Rock salt1.54Alcohol1.36−−Kerosene1.44Carbon disulphide1.63Fused quartz1.46Dense flint glass1.65Turpentine oil1.47Ruby1.71Benzene1.50Sapphire1.77Crown glass1.52Diamond2.42$

Discussion

19.	A beam of light incident on a convex lens parallel to its prinicpal axis converges at a point F on the principal axis. Name the point F. Draw a ray diagram to show it.
Answer» A beam of light incident on a convex lens parallel to its prinicpal axis converges at a point F on the principal axis. Name the point F. Draw a ray diagram to show it.

Discussion

20.	7.Under what conditionss a biconvex lens of glass having a certain refractive index act as a plain glass sheet when immersed in liquid?
Answer» 7.Under what conditionss a biconvex lens of glass having a certain refractive index act as a plain glass sheet when immersed in liquid?

Discussion

21.	When supply is completely inelastic, the elasticity of supply is equal to
Answer» When supply is completely inelastic, the elasticity of supply is equal to

Discussion

22.	6.Use kirchhoff's rules to determine the potential difference between the points A and D when no current flows in the arm BE of the electric network shown in the figure.
Answer» 6.Use kirchhoff's rules to determine the potential difference between the points A and D when no current flows in the arm BE of the electric network shown in the figure.

Discussion

23.	12.what will be the total electric flux through the closed cylinder when a positive charge(q) is placed at on its curved surface?
Answer» 12.what will be the total electric flux through the closed cylinder when a positive charge(q) is placed at on its curved surface?

Discussion

24.	Why is NH3 considered a polar molecular solid and not H-bonded?
Answer» Why is NH3 considered a polar molecular solid and not H-bonded?

Discussion

25.	To form an image twice the size of the object using a convex lens of local length 20 cm, the object distance must be
Answer» To form an image twice the size of the object using a convex lens of local length 20 cm, the object distance must be

Discussion

26.	The stability of hydrophilic sol is due to -
Answer» The stability of hydrophilic sol is due to -

Discussion

27.	In the shown figure, a particle of mass 'm' slides down the frictionless surface from height 'h' and collides with the uniform vertical rod of length L and mass M. After the collision, mass m sticks to the rod. The rod is free to rotate in a vertical plane about a fixed axis through O. Find the cosine of the maximum angular deflection of the rod from its initial position.
Answer» In the shown figure, a particle of mass 'm' slides down the frictionless surface from height 'h' and collides with the uniform vertical rod of length L and mass M. After the collision, mass m sticks to the rod. The rod is free to rotate in a vertical plane about a fixed axis through O. Find the cosine of the maximum angular deflection of the rod from its initial position.

27.

In the shown figure, a particle of mass 'm' slides down the frictionless surface from height 'h' and collides with the uniform vertical rod of length L and mass M. After the collision, mass m sticks to the rod. The rod is free to rotate in a vertical plane about a fixed axis through O. Find the cosine of the maximum angular deflection of the rod from its initial position.

Answer»

In the shown figure, a particle of mass 'm' slides down the frictionless surface from height 'h' and collides with the uniform vertical rod of length L and mass M. After the collision, mass m sticks to the rod. The rod is free to rotate in a vertical plane about a fixed axis through O. Find the cosine of the maximum angular deflection of the rod from its initial position.

Discussion

28.	After 280 days, the activity of a radioactive sample is 6000 dps. The activity reduces to 3000 dps after another 140 days. The initial activity of the sample (in dps) is,
Answer» After $280$ days, the activity of a radioactive sample is $6000 dps$ . The activity reduces to $3000 dps$ after another $140$ days. The initial activity of the sample (in $dps$ ) is,

Discussion

29.	A rectangular loop ABCD having some resistanceis pulled with constant velocity v out of a uniformmagnetic field directed into the plane of paper. Attime t 0, side BC of the loop is at edge of themagnetic field as shown in the figure. The inducedcurrent (i) versus time (t) graph will be13.
Answer» A rectangular loop ABCD having some resistanceis pulled with constant velocity v out of a uniformmagnetic field directed into the plane of paper. Attime t 0, side BC of the loop is at edge of themagnetic field as shown in the figure. The inducedcurrent (i) versus time (t) graph will be13.

Discussion

30.	The plane surface of a plano-convex lens of focal length f is silvered. It will behave as:plane mirror convex lens of focal length 2f concave lens of focal length f/2
Answer» The plane surface of a plano-convex lens of focal length f is silvered. It will behave as: plane mirror convex lens of focal length 2f concave lens of focal length f/2

Discussion

31.	A conductor of truncated conical (frustum) is connected to a battery of emf ε as shown in the figure.If at a section distant x from left end, electric field intensity, potential and rate of generation of heat per unit length are E, V and H respectively, then which of the following graph(s) is/are correct?
Answer» A conductor of truncated conical (frustum) is connected to a battery of emf $ε$ as shown in the figure. If at a section distant x from left end, electric field intensity, potential and rate of generation of heat per unit length are E, V and H respectively, then which of the following graph(s) is/are correct?

Discussion

32.	What is a total reflecting prism? State three actions that it can produce. Draw a diagram to show one such action of the total reflecting prism.
Answer» What is a total reflecting prism? State three actions that it can produce. Draw a diagram to show one such action of the total reflecting prism.

Discussion

33.	दूसरे कवित्त के आधार पर स्पष्ट करें कि ऋतुराज वसंत के बाल-रूप का वर्णन परंपरागत वसंत वर्णन से किस प्रकार भिन्न है।
Answer» दूसरे कवित्त के आधार पर स्पष्ट करें कि ऋतुराज वसंत के बाल-रूप का वर्णन परंपरागत वसंत वर्णन से किस प्रकार भिन्न है।

Discussion

34.	The voltage of an AC source varies with time according to the relation E = 100 sin(50wt) cos(50wt) V. Select the correct statement (1) Peak voltage of source is 50 V(2) Frequency of source is 100 Hz(3) Frequency of source is 50 Hz(4) Both (1) and (3)
Answer» The voltage of an AC source varies with time according to the relation E = 100 sin(50wt) cos(50wt) V. Select the correct statement (1) Peak voltage of source is 50 V (2) Frequency of source is 100 Hz (3) Frequency of source is 50 Hz (4) Both (1) and (3)

Discussion

35.	a ball hits a wall horizontally at 6m/s . It rebounds horizontally at 4.4 m/s. the ball is in contact with the wall for 0.040 second . the What is the acceleration of the ball ?
Answer» a ball hits a wall horizontally at 6m/s . It rebounds horizontally at 4.4 m/s. the ball is in contact with the wall for 0.040 second . the What is the acceleration of the ball ?

Discussion

36.	An electron of mass m and having an initial velocity →v=v0 ^i (v0>0), enters an electric field →E=−E0^i (E0 (constant)>0) at t=0. If λ0 is its de-Broglie wavelength initially, then its de-Broglie wavelength after time t is,
Answer» An electron of mass $m$ and having an initial velocity $\to v = v_{0}^i (v_{0} > 0)$ , enters an electric field $\to E = - E_{0}^i (E_{0} (constant) > 0)$ at $t = 0$ . If $λ_{0}$ is its de-Broglie wavelength initially, then its de-Broglie wavelength after time $t$ is,

Discussion

37.	Fill in the following blanks with suitable words : (a) The reciprocal of the focal length in metres gives you the of ___ the lens, which is measured in ___ (b) For converging lenses, the power is ___while for diverging lenses, the power is ___.
Answer» Fill in the following blanks with suitable words : (a) The reciprocal of the focal length in metres gives you the of ___ the lens, which is measured in ___ (b) For converging lenses, the power is ___while for diverging lenses, the power is ___.

Discussion

38.	Four wires each of the same length, diameter and material are connected to form a square. If the resistance of each wire is R, then equivalent resistance across the opposite corners is :
Answer» Four wires each of the same length, diameter and material are connected to form a square. If the resistance of each wire is $R,$ then equivalent resistance across the opposite corners is :

Discussion

39.	The sound emitted by a source returns back, after reflection, from a surface after a time interval of 0.5 seconds. What is the distance between the source and the reflecting surface? (Speed of sound in air is 340 m/s)
Answer» The sound emitted by a source returns back, after reflection, from a surface after a time interval of $0.5$ seconds. What is the distance between the source and the reflecting surface? (Speed of sound in air is $340 m/s$ )

Discussion

40.	Which kind of mirror is used in the headlights of a car ? Why is it used for this purpose ?
Answer» Which kind of mirror is used in the headlights of a car ? Why is it used for this purpose ?

Discussion

41.	A particle moves in a circular orbit under the action of a central attractive force inversely proportionl tobthe dis†an ce r the speed of the partivle i
Answer» A particle moves in a circular orbit under the action of a central attractive force inversely proportionl tobthe dis†an ce r the speed of the partivle i

Discussion

42.	Two identical parallel plate capacitors are connected paralle. Initially both have total charge qo andseparation between their plates Xo. At an instant, plates ofone capacitor begin to move towards each other and platesof the other capacitor moves away from each other. Ifvelocity of a plate relative to the other plate in both thecapacitors has the same magnitudes v, find current in thecircuit.
Answer» Two identical parallel plate capacitors are connected paralle. Initially both have total charge qo andseparation between their plates Xo. At an instant, plates ofone capacitor begin to move towards each other and platesof the other capacitor moves away from each other. Ifvelocity of a plate relative to the other plate in both thecapacitors has the same magnitudes v, find current in thecircuit.

Discussion

43.	A light ray enters a solid glass sphere of refractive index μ=√3 at an angle of incidence 60∘. The ray is both reflected and refracted at the farther surface of the sphere. The angle (in degrees) between the reflected and refracted rays at this surface is
Answer» A light ray enters a solid glass sphere of refractive index $μ = \sqrt{3}$ at an angle of incidence $60^{\circ}$ . The ray is both reflected and refracted at the farther surface of the sphere. The angle (in degrees) between the reflected and refracted rays at this surface is

Discussion

44.	Burning garbage may lead to which of the following type of air pollution?
Answer» Burning garbage may lead to which of the following type of air pollution?

Discussion

45.	An object of 5cm size is placed at a distance of 20cm from a converging mirror of focal15cm. At what distance from the mirror should a screen be placed to get a sharpimage? Also calculate the size of the image?
Answer» An object of 5cm size is placed at a distance of 20cm from a converging mirror of focal 15cm. At what distance from the mirror should a screen be placed to get a sharp image? Also calculate the size of the image?

Discussion

46.	CONSIDER AN ELECTRIC FIELD E E0X WHERE E0 IS A CONSTANT THE FLUX THROUGH THE D SHADED AREA (AS SHOWN IN THE FIGURE) DUE TO FIELD IS NE0A^2 THE
Answer» CONSIDER AN ELECTRIC FIELD E E0X WHERE E0 IS A CONSTANT THE FLUX THROUGH THE D SHADED AREA (AS SHOWN IN THE FIGURE) DUE TO FIELD IS NE0A^2 THE

Discussion

47.	201 The values of currentIflowing in a given resistor for the corresponding values of potential differenceVacross the resistor are given below I(amperes ) 0.5 1.0 2.0 3.0 4.0 V(volts) 1.6 3.4 6.7 10.2 13.2 Plot a graph betweenVandIand calculate the resistance of that resistor.
Answer» 201 The values of currentIflowing in a given resistor for the corresponding values of potential differenceVacross the resistor are given below I(amperes ) 0.5 1.0 2.0 3.0 4.0 V(volts) 1.6 3.4 6.7 10.2 13.2 Plot a graph betweenVandIand calculate the resistance of that resistor.

Discussion

48.	If the light ray traces the path shown in the figure,Find the angle of incidence.
Answer» If the light ray traces the path shown in the figure,Find the angle of incidence.

Discussion

49.	Question 18 (b)A person needs a lens of power –4.5 D for correction of her vision. What is the focal length of the corrective lens?
Answer» Question 18 (b) A person needs a lens of power –4.5 D for correction of her vision. What is the focal length of the corrective lens?

Discussion

50.	How many resistors of 88 W are connected in parallel to carry 10 A current on a 220 v line
Answer» How many resistors of 88 W are connected in parallel to carry 10 A current on a 220 v line

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What is the maximum deviation in refraction of light through a prism

oc - to - pus el - e - phant butt - er - fly kang - ga - roo

A: the Apparent weight of a body in an elevator moving with some downward acceleration is less than the actual weight of a body R: the part of the weight is spent in producing downward acceleration when body is in elevator

Assertion: The resolving power of a telescope is more if the diameter of the objective lens is more. Reason Objective lens of large diameter collectsmore light.

23.An object O is placed at a distance x from the focus of a convex lens and its image I is formed at a distance x' from the other focus as shown in the figure. The distance x, x' satisfy the relation (1) F = xx' (2) F = (x+x')/2 (3) 2F greater than equal to x+x' (4) 2F less than equal to x+x'

20. figure shows four points A,B,C and D in uniform electric field E. the lines AB and CD are perpendicular and BC and AD are parallel to the field lines. if Va,Vb,Vc and Vd are electric potential at A,B,C and D. choose the correct option. (1) Va=Vb=Vc=Vd (2) (Va=Vb)>(Vc=Vd) (3) (Va=Vb)Vb=Vc>Vd

Using a horizontal force of 200 N, we intend to move a wooden cabinet across a floor at a constant velocity. What is the friction force that will be exerted on the cabinet?

The circuit given below consists of cells with their internal resistance(iii) If the polarity of cell of 4 V is reversed, the equivalent emf between the terminals A and B is

Four identical cells of emf 1.5 V each were connected in four different ways as shown below:The potential difference between the points X and Y would be equal to 6.0 V in case/cases:(1) A and B(2) A and C(3) A and D(4) A only

The entire range of wavelength is called ___.

Ram is pumping 100 metallic charged spheres one by one in a tube whose ends are maintained at a potential difference of 10 V. The work done in pumping these spheres is 50 J. Find the charge on each sphere.

The value of A for a neutral atom is 25 and Z is 12. Then, the number of protons and neutrons in the atom areand respectively.

Derivation of mirror formula.

What are biomass fuels?

A bulb of (220 V, 60 W) is operated on 110 V supply then power developed in it is

A beam of light incident on a convex lens parallel to its prinicpal axis converges at a point F on the principal axis. Name the point F. Draw a ray diagram to show it.

7.Under what conditionss a biconvex lens of glass having a certain refractive index act as a plain glass sheet when immersed in liquid?

When supply is completely inelastic, the elasticity of supply is equal to

6.Use kirchhoff's rules to determine the potential difference between the points A and D when no current flows in the arm BE of the electric network shown in the figure.

12.what will be the total electric flux through the closed cylinder when a positive charge(q) is placed at on its curved surface?

Why is NH3 considered a polar molecular solid and not H-bonded?

To form an image twice the size of the object using a convex lens of local length 20 cm, the object distance must be

The stability of hydrophilic sol is due to -

After 280 days, the activity of a radioactive sample is 6000 dps. The activity reduces to 3000 dps after another 140 days. The initial activity of the sample (in dps) is,

A rectangular loop ABCD having some resistanceis pulled with constant velocity v out of a uniformmagnetic field directed into the plane of paper. Attime t 0, side BC of the loop is at edge of themagnetic field as shown in the figure. The inducedcurrent (i) versus time (t) graph will be13.

The plane surface of a plano-convex lens of focal length f is silvered. It will behave as:plane mirror convex lens of focal length 2f concave lens of focal length f/2

What is a total reflecting prism? State three actions that it can produce. Draw a diagram to show one such action of the total reflecting prism.

दूसरे कवित्त के आधार पर स्पष्ट करें कि ऋतुराज वसंत के बाल-रूप का वर्णन परंपरागत वसंत वर्णन से किस प्रकार भिन्न है।

The voltage of an AC source varies with time according to the relation E = 100 sin(50wt) cos(50wt) V. Select the correct statement (1) Peak voltage of source is 50 V(2) Frequency of source is 100 Hz(3) Frequency of source is 50 Hz(4) Both (1) and (3)

a ball hits a wall horizontally at 6m/s . It rebounds horizontally at 4.4 m/s. the ball is in contact with the wall for 0.040 second . the What is the acceleration of the ball ?

An electron of mass m and having an initial velocity →v=v0 ^i (v0&gt;0), enters an electric field →E=−E0^i (E0 (constant)&gt;0) at t=0. If λ0 is its de-Broglie wavelength initially, then its de-Broglie wavelength after time t is,

Fill in the following blanks with suitable words : (a) The reciprocal of the focal length in metres gives you the of ___ the lens, which is measured in ___ (b) For converging lenses, the power is ___while for diverging lenses, the power is ___.

Four wires each of the same length, diameter and material are connected to form a square. If the resistance of each wire is R, then equivalent resistance across the opposite corners is :

The sound emitted by a source returns back, after reflection, from a surface after a time interval of 0.5 seconds. What is the distance between the source and the reflecting surface? (Speed of sound in air is 340 m/s)

Which kind of mirror is used in the headlights of a car ? Why is it used for this purpose ?

A particle moves in a circular orbit under the action of a central attractive force inversely proportionl tobthe dis†an ce r the speed of the partivle i

A light ray enters a solid glass sphere of refractive index μ=√3 at an angle of incidence 60∘. The ray is both reflected and refracted at the farther surface of the sphere. The angle (in degrees) between the reflected and refracted rays at this surface is

Burning garbage may lead to which of the following type of air pollution?

An object of 5cm size is placed at a distance of 20cm from a converging mirror of focal15cm. At what distance from the mirror should a screen be placed to get a sharpimage? Also calculate the size of the image?

CONSIDER AN ELECTRIC FIELD E E0X WHERE E0 IS A CONSTANT THE FLUX THROUGH THE D SHADED AREA (AS SHOWN IN THE FIGURE) DUE TO FIELD IS NE0A^2 THE

201 The values of currentIflowing in a given resistor for the corresponding values of potential differenceVacross the resistor are given below I(amperes ) 0.5 1.0 2.0 3.0 4.0 V(volts) 1.6 3.4 6.7 10.2 13.2 Plot a graph betweenVandIand calculate the resistance of that resistor.

If the light ray traces the path shown in the figure,Find the angle of incidence.

Question 18 (b)A person needs a lens of power –4.5 D for correction of her vision. What is the focal length of the corrective lens?

How many resistors of 88 W are connected in parallel to carry 10 A current on a 220 v line

An electron of mass m and having an initial velocity →v=v0 ^i (v0>0), enters an electric field →E=−E0^i (E0 (constant)>0) at t=0. If λ0 is its de-Broglie wavelength initially, then its de-Broglie wavelength after time t is,

Fill in the following blanks with suitable words : (a) The reciprocal of the focal length in metres gives you the of _ the lens, which is measured in _ (b) For converging lenses, the power is _while for diverging lenses, the power is _.