16569 + Interview Questions in Physics

1.	If the solar constant is 1.4kW/m2, then the solar energy received by 1 m2 area in one hour is : (a) 5040 j (b) 504.0 kj (c) 5040 kj (d) 5.04 kj
Answer» If the solar constant is $1.4 k W / m^{2}$ , then the solar energy received by 1 $m^{2}$ area in one hour is : (a) 5040 j (b) 504.0 kj (c) 5040 kj (d) 5.04 kj

Discussion

2.	An ideal gas expands isothermally from 10−3 m3 to 10−2 m3 at 300 K against a constant pressure of 105N m−2. The work done on the gas is
Answer» An ideal gas expands isothermally from $10^{- 3} m^{3}$ to $10^{- 2} m^{3}$ at $300 K$ against a constant pressure of $10^{5} N m^{- 2}$ . The work done on the gas is

Discussion

3.	The correct set up for studying the dependence of the current on the potential difference across a resistor is:
Answer» The correct set up for studying the dependence of the current on the potential difference across a resistor is:

3.

The correct set up for studying the dependence of the current on the potential difference across a resistor is:

Answer»

The correct set up for studying the dependence of the current on the potential difference across a resistor is:

Discussion

4.	ntIf a bar magnet is placed with its south pole pointing towards geographic south in magnetic meridian,then the neutral points are locatedn nta)on the line perpendicular to the axis of the magnetn ntb)along the axis of the magnetn ntc)at the middle point of the magnetn ntd)at the angle of 45 degree with the magnetic meridiann
Answer» ntIf a bar magnet is placed with its south pole pointing towards geographic south in magnetic meridian,then the neutral points are locatedn nta)on the line perpendicular to the axis of the magnetn ntb)along the axis of the magnetn ntc)at the middle point of the magnetn ntd)at the angle of 45 degree with the magnetic meridiann

Discussion

5.	Distinguish between:a. Farsightedness and Nearsightednessb. Concave lens and Convex lens
Answer» Distinguish between: a. Farsightedness and Nearsightedness b. Concave lens and Convex lens

Discussion

6.	A ray of light strikes a plane mirror PQ at an angle of incidence of 30∘, is reflected from the plane mirror and then strikes a second plane mirror QR placed at right angles to the first mirror. The angle of reflection at the second mirror is : (a) 30∘ (b) 45∘ (c) 60∘ (d) 90∘ Draw a ray-diagram to illustrate your answer.
Answer» A ray of light strikes a plane mirror PQ at an angle of incidence of $30^{\circ}$ , is reflected from the plane mirror and then strikes a second plane mirror QR placed at right angles to the first mirror. The angle of reflection at the second mirror is : (a) $30^{\circ}$ (b) $45^{\circ}$ (c) $60^{\circ}$ (d) $90^{\circ}$ Draw a ray-diagram to illustrate your answer.

6.

A ray of light strikes a plane mirror PQ at an angle of incidence of 30∘, is reflected from the plane mirror and then strikes a second plane mirror QR placed at right angles to the first mirror. The angle of reflection at the second mirror is : (a) 30∘ (b) 45∘ (c) 60∘ (d) 90∘ Draw a ray-diagram to illustrate your answer.

Answer»

A ray of light strikes a plane mirror PQ at an angle of incidence of $30^{\circ}$ , is reflected from the plane mirror and then strikes a second plane mirror QR placed at right angles to the first mirror. The angle of reflection at the second mirror is :

(a) $30^{\circ}$ (b) $45^{\circ}$ (c) $60^{\circ}$ (d) $90^{\circ}$ Draw a ray-diagram to illustrate your answer.

Discussion

7.	The poles of a horse-shoe magnet each of pole strength 2 Am are at 4 cm apart.(i)The magnetic moment of the horse-shoe magnet is (in Am2)
Answer» The poles of a horse-shoe magnet each of pole strength $2 Am$ are at $4 cm$ apart. $(i)$ The magnetic moment of the horse-shoe magnet is $(in {Am}^{2})$

Discussion

8.	It is generally cold after a hail-storm than during and before the hail-storm. Give reason.
Answer» It is generally cold after a hail-storm than during and before the hail-storm. Give reason.

8.

It is generally cold after a hail-storm than during and before the hail-storm. Give reason.

Answer»

It is generally cold after a hail-storm than during and before the hail-storm. Give reason.

Discussion

9.	Lens maker's formula derivation
Answer» Lens maker's formula derivation

Discussion

10.	Which of the following is not a primary color?
Answer» Which of the following is not a primary color?

Discussion

11.	59.A person uses +1.5 D glasses to have normal vision from 25 cm onwards. He uses a 20 D lens as a simple microscope to see an object. What will be the maximum magnifying power, is he uses the microscope together with his glasses (A) 6 (B) 3 (C) 10 (D) 9
Answer» 59.A person uses +1.5 D glasses to have normal vision from 25 cm onwards. He uses a 20 D lens as a simple microscope to see an object. What will be the maximum magnifying power, is he uses the microscope together with his glasses (A) 6 (B) 3 (C) 10 (D) 9

Discussion

12.	A toy train of mass 1 kg moves with a constant velocity of 8 ms when connected to a battery of 8 volts. Find the current in the circuit if the battery was connected for 4 s. Assume no energy loss due to friction.
Answer» A toy train of mass 1 kg moves with a constant velocity of 8 $\frac{m}{s}$ when connected to a battery of 8 volts. Find the current in the circuit if the battery was connected for 4 s. Assume no energy loss due to friction.

Discussion

13.	Which of the following pair(s) is/are true?
Answer» Which of the following pair(s) is/are true?

Discussion

14.	6.A solenoid wound over a rectangular frame. If all the linear dimensions of the frame are increased by a factor3 and the number of turns per unit length remains the same, the self inductance increased by a factor of -1) 3(2) 9(3) 27(4) 63
Answer» 6.A solenoid wound over a rectangular frame. If all the linear dimensions of the frame are increased by a factor3 and the number of turns per unit length remains the same, the self inductance increased by a factor of -1) 3(2) 9(3) 27(4) 63

Discussion

15.	39.Factors that affect polarization and lattice energy
Answer» 39.Factors that affect polarization and lattice energy

Discussion

16.	The K.E of a body in S.H.M is 16J when it is at mean position. If the amplitude of oscillations is 25 cm and mass of body m is 5 kg, the time period of its oscillations is
Answer» The K.E of a body in S.H.M is 16J when it is at mean position. If the amplitude of oscillations is 25 cm and mass of body m is 5 kg, the time period of its oscillations is

Discussion

17.	How is the power of a lens related to its focal length ?
Answer» How is the power of a lens related to its focal length ?

Discussion

18.	12. There are two charges 2muC and -3 mu C.THe ratio of the force acting on them will be:- a. 2:3 2.1:1 3.3:2 4. 4:9
Answer» 12. There are two charges 2muC and -3 mu C.THe ratio of the force acting on them will be:- a. 2:3 2.1:1 3.3:2 4. 4:9

Discussion

19.	"The ignition temperature of a fuel is 80∘C". What does this mean?
Answer» "The ignition temperature of a fuel is $80^{\circ} C$ ". What does this mean?

Discussion

20.	The current in an ideal, long solenoid is veried at a uniform rate of `0.01 As^(-1). The solenoid has 2000 turns/m and its radius 6.0 cm. (a) Consider a circle of radius 1.0 cm inside the solenoid with its axis coinciding with the axis of the solenoid. write the change in the magnetic flux through this circle in 2.0 seconds. (b) find the electric field induced at a point on the circumference of hte circle. (c) find the electric field induced at a piont outside the solenoid at a distance 8.0cm from its axis.
Answer» The current in an ideal, long solenoid is veried at a uniform rate of `0.01 As^(-1). The solenoid has 2000 turns/m and its radius 6.0 cm. (a) Consider a circle of radius 1.0 cm inside the solenoid with its axis coinciding with the axis of the solenoid. write the change in the magnetic flux through this circle in 2.0 seconds. (b) find the electric field induced at a point on the circumference of hte circle. (c) find the electric field induced at a piont outside the solenoid at a distance 8.0cm from its axis.

Discussion

21.	Question 1Draw a schematic diagram of a circuit consisting of a battery of three cells of 2 V each, a 5Ω resistor, a 8Ω resistor, and a 12Ω resistor, and a plug key, all connected in series.
Answer» Question 1 Draw a schematic diagram of a circuit consisting of a battery of three cells of 2 V each, a $5 Ω$ resistor, a $8 Ω$ resistor, and a $12 Ω$ resistor, and a plug key, all connected in series.

Discussion

22.	Upward acceleration of a rocket is given by (where v = speed of gas relative to rocket, M = mass of rocket and m = mass of fuel)
Answer» Upward acceleration of a rocket is given by (where v = speed of gas relative to rocket, M = mass of rocket and m = mass of fuel)

Discussion

23.	nta long solenoid is fabricated to closely winding wire of radius 0.5mm over a cylinderical frame so that the successive turns nearly touch each other ,the magnetic feild at the center of solenoid if it carries a current of 5An
Answer» nta long solenoid is fabricated to closely winding wire of radius 0.5mm over a cylinderical frame so that the successive turns nearly touch each other ,the magnetic feild at the center of solenoid if it carries a current of 5An

Discussion

24.	The diagram alongside shows an arrangement of three pulleys A, B and C. The load is marked as L and the effort as E. (a) Name the pulleys A, B and C. (b) Mark in the diagram the directions of load (L) effort (E) and tension T1 and T2 in the two strings. (c) How are the magnitudes of L and E related to the tension T1? (d) Calculate the mechanical advantage and velocity ratio of the arrangement. (e) What assumptions have you made in parts (c) and (d)?
Answer» The diagram alongside shows an arrangement of three pulleys A, B and C. The load is marked as L and the effort as E. (a) Name the pulleys A, B and C. (b) Mark in the diagram the directions of load (L) effort (E) and tension $T_{1}$ and $T_{2}$ in the two strings. (c) How are the magnitudes of L and E related to the tension $T_{1}$ ? (d) Calculate the mechanical advantage and velocity ratio of the arrangement. (e) What assumptions have you made in parts (c) and (d)?

24.

The diagram alongside shows an arrangement of three pulleys A, B and C. The load is marked as L and the effort as E. (a) Name the pulleys A, B and C. (b) Mark in the diagram the directions of load (L) effort (E) and tension T1 and T2 in the two strings. (c) How are the magnitudes of L and E related to the tension T1? (d) Calculate the mechanical advantage and velocity ratio of the arrangement. (e) What assumptions have you made in parts (c) and (d)?

Answer»

The diagram alongside shows an arrangement of three pulleys A, B and C. The load is marked as L and the effort as E.

(a) Name the pulleys A, B and C.

(b) Mark in the diagram the directions of load (L) effort (E) and tension $T_{1}$ and $T_{2}$ in the two strings.

(c) How are the magnitudes of L and E related to the tension $T_{1}$ ?

(d) Calculate the mechanical advantage and velocity ratio of the arrangement.

(e) What assumptions have you made in parts (c) and (d)?

Discussion

25.	When resistances are connected in series, then the current through the circuit remains same. If we take two resistances R1( more) and R2( less resistance), then there will be more obstruction offered to the flow of electrons in R1 than R2 i.e., the electrons will move more easily in R1 and thus faster in R1 ( due to less collisions) and thus the rate of flow of electrons will be more i.e., more current ( which is defined as the rate of flow of charge ) will flow. Then should the current glowing through the different resistanced in series be different ?
Answer» When resistances are connected in series, then the current through the circuit remains same. If we take two resistances R1( more) and R2( less resistance), then there will be more obstruction offered to the flow of electrons in R1 than R2 i.e., the electrons will move more easily in R1 and thus faster in R1 ( due to less collisions) and thus the rate of flow of electrons will be more i.e., more current ( which is defined as the rate of flow of charge ) will flow. Then should the current glowing through the different resistanced in series be different ?

Discussion

26.	A convex lens is given for which the minimum distance between an object and its real image is 40 cm . an object is placed at a distance of 15 cm from this lens . the linear magnification of adjustment will be
Answer» A convex lens is given for which the minimum distance between an object and its real image is 40 cm . an object is placed at a distance of 15 cm from this lens . the linear magnification of adjustment will be

Discussion

27.	29.What is magnetic moment of Cr , Ti(I) , Mn(I)
Answer» 29.What is magnetic moment of Cr , Ti(I) , Mn(I)

Discussion

28.	Look at the figure given below and answer question based on that. Iron filings are sprinkled on a cardboard perpendicular to which a current carrying copper wire runs. A compass is placed at point 'P'. The other components of the circuit have their usual meaningsIf the polarity of the battery in the circuit is changed then__
Answer» Look at the figure given below and answer question based on that. Iron filings are sprinkled on a cardboard perpendicular to which a current carrying copper wire runs. A compass is placed at point 'P'. The other components of the circuit have their usual meanings If the polarity of the battery in the circuit is changed then__

28.

Look at the figure given below and answer question based on that. Iron filings are sprinkled on a cardboard perpendicular to which a current carrying copper wire runs. A compass is placed at point 'P'. The other components of the circuit have their usual meaningsIf the polarity of the battery in the circuit is changed then__

Answer»

Look at the figure given below and answer question based on that.

Iron filings are sprinkled on a cardboard perpendicular to which a current carrying copper wire runs. A compass is placed at point 'P'. The other components of the circuit have their usual meanings

If the polarity of the battery in the circuit is changed then__

Discussion

29.	Sun and sky appear to be red during sunset and sunrise because
Answer» Sun and sky appear to be red during sunset and sunrise because

Discussion

30.	what is the frequency of AabbCcDdee if parents are AabbCCddEe and AabbccDdee?
Answer» what is the frequency of AabbCcDdee if parents are AabbCCddEe and AabbccDdee?

Discussion

31.	A person wears eyeglass of focal length -70 cm what is the far point of the person?
Answer» A person wears eyeglass of focal length -70 cm what is the far point of the person?

Discussion

32.	In Fig. 5.40, AO is the ray of white light falling on a prism PQR. Complete the diagram till the light emerges out from the prism and falls on the screen.
Answer» In Fig. 5.40, AO is the ray of white light falling on a prism PQR. Complete the diagram till the light emerges out from the prism and falls on the screen.

32.

In Fig. 5.40, AO is the ray of white light falling on a prism PQR. Complete the diagram till the light emerges out from the prism and falls on the screen.

Answer»

In Fig. 5.40, AO is the ray of white light falling on a prism PQR. Complete the diagram till the light emerges out from the prism and falls on the screen.

Discussion

33.	13.On a 30^° inclined smooth plane, a thin current carrying rod is placed parallel to the horizontal ground. The plane is located in a uniform vertical magnetic field of 0.15 T. The mass/length of the rod is 0.30 kg/m. Find the current required to keep the rod stationary.
Answer» 13.On a 30^° inclined smooth plane, a thin current carrying rod is placed parallel to the horizontal ground. The plane is located in a uniform vertical magnetic field of 0.15 T. The mass/length of the rod is 0.30 kg/m. Find the current required to keep the rod stationary.

Discussion

34.	52.two inductor coils of self inductance L1=10H and L2=20H are placed as shown. the mutual inductance of the coil is 3H . the equivalent inductance between AB of the system of coils options a)36H b)24H c)20/3H d)38/3H
Answer» 52.two inductor coils of self inductance L1=10H and L2=20H are placed as shown. the mutual inductance of the coil is 3H . the equivalent inductance between AB of the system of coils options a)36H b)24H c)20/3H d)38/3H

Discussion

35.	Fill in the blanks using the proper word and complete the statements.(a) The ....... in the centre, the .......... on one side and the ...... on the other side make a lever of the first order.(b) The ..... in the centre, the ........ on one side and the ......... on the other side make a lever of the second order.(c) The .......... in the centre, the ....... on one side and the........on the other side make a lever of the third order.
Answer» Fill in the blanks using the proper word and complete the statements. (a) The ....... in the centre, the .......... on one side and the ...... on the other side make a lever of the first order. (b) The ..... in the centre, the ........ on one side and the ......... on the other side make a lever of the second order. (c) The .......... in the centre, the ....... on one side and the........on the other side make a lever of the third order.

Discussion

36.	Explain the construction and working of the following. Draw a neat diagram and label it.a. Electric motorb. Electric Generator (AC)
Answer» Explain the construction and working of the following. Draw a neat diagram and label it. a. Electric motor b. Electric Generator (AC)

Discussion

37.	ntA telescope has an objective of focal length 50 cm and an eye piece of focal length 5 cm.the least distance of distinct vision is 25.the telescope is focussed for distinct vision on a scale 200 cm away.the separation btw the objective and eye piece isn
Answer» ntA telescope has an objective of focal length 50 cm and an eye piece of focal length 5 cm.the least distance of distinct vision is 25.the telescope is focussed for distinct vision on a scale 200 cm away.the separation btw the objective and eye piece isn

Discussion

38.	What is the process of thermonuclear fusion?
Answer» What is the process of thermonuclear fusion?

Discussion

39.	What does the law of reflection states about the incident ray, the normal at the point of incidence and the reflected ray? [1 MARK]
Answer» What does the law of reflection states about the incident ray, the normal at the point of incidence and the reflected ray? [1 MARK]

Discussion

40.	Differentiate between muscular force and magnetic force. [3 MARKS]
Answer» Differentiate between muscular force and magnetic force. [3 MARKS]

Discussion

41.	Given are a few practices associated with ganga river that people do generally. Pick out those that pollute the ganga river.1) Industries dump there chemical waste in ganga2) We use river for transportation3) Washer men use ganga water to wash clothes on the river banks4) We build turbine on the flowing water of river ganga to generate electricity5) After cremation ashes of dead bodies and the unburnt bodies are immersed in the ganga river.6) Use of river water for irrigation.
Answer» Given are a few practices associated with ganga river that people do generally. Pick out those that pollute the ganga river. 1) Industries dump there chemical waste in ganga 2) We use river for transportation 3) Washer men use ganga water to wash clothes on the river banks 4) We build turbine on the flowing water of river ganga to generate electricity 5) After cremation ashes of dead bodies and the unburnt bodies are immersed in the ganga river. 6) Use of river water for irrigation.

41.

Given are a few practices associated with ganga river that people do generally. Pick out those that pollute the ganga river.1) Industries dump there chemical waste in ganga2) We use river for transportation3) Washer men use ganga water to wash clothes on the river banks4) We build turbine on the flowing water of river ganga to generate electricity5) After cremation ashes of dead bodies and the unburnt bodies are immersed in the ganga river.6) Use of river water for irrigation.

Answer»

Given are a few practices associated with ganga river that people do generally. Pick out those that pollute the ganga river.

1) Industries dump there chemical waste in ganga

2) We use river for transportation

3) Washer men use ganga water to wash clothes on the river banks

4) We build turbine on the flowing water of river ganga to generate electricity

5) After cremation ashes of dead bodies and the unburnt bodies are immersed in the ganga river.

6) Use of river water for irrigation.

Discussion

42.	In a series electrical cicuit comprising a resistor made up of metallic wire, the ammeter reads 100mA. If the length of the wire is doubled, how will the current in the circuit change? Justify your answer.
Answer» In a series electrical cicuit comprising a resistor made up of metallic wire, the ammeter reads 100mA. If the length of the wire is doubled, how will the current in the circuit change? Justify your answer.

Discussion

43.	An LR circuit draws a power of }560W from a }210V,60Hz AC source. The power factor of the circuit } is }0.8, Find the value of }L and }R
Answer» An LR circuit draws a power of }560W from a }210V,60Hz AC source. The power factor of the circuit } is }0.8, Find the value of }L and }R

Discussion

44.	Water- mirror system is shown in figure. A point object P is also marked. The radii of curriature of mirror is 120 cm. Two images of object P are considered one by direct reflection from water surface and other by refraction at water surface-reflection at mirror-refraction at water surface. The separation between two images isRefractive index of water is 483
Answer» Water- mirror system is shown in figure. $A$ point object $P$ is also marked. The radii of curriature of mirror is $120 c m$ . Two images of object $P$ are considered one by direct reflection from water surface and other by refraction at water surface-reflection at mirror-refraction at water surface. The separation between two images is Refractive index of water is $\frac{48}{3}$

44.

Water- mirror system is shown in figure. A point object P is also marked. The radii of curriature of mirror is 120 cm. Two images of object P are considered one by direct reflection from water surface and other by refraction at water surface-reflection at mirror-refraction at water surface. The separation between two images isRefractive index of water is 483

Answer»

Water- mirror system is shown in figure. $A$ point object $P$ is also marked. The radii of curriature of mirror is $120 c m$ . Two images of object $P$ are considered one by direct reflection from water surface and other by refraction at water surface-reflection at mirror-refraction at water surface. The separation between two images is

Refractive index of water is $\frac{48}{3}$

Discussion

45.	16. A nucleus disintegrates into two daughter nuclei with masses in the ratio 1:26 if the radius of the parent nucleus is r radius of the lighter daughter nucleus is a) r b) r/2 c) r/3 d) r/9
Answer» 16. A nucleus disintegrates into two daughter nuclei with masses in the ratio 1:26 if the radius of the parent nucleus is r radius of the lighter daughter nucleus is a) r b) r/2 c) r/3 d) r/9

Discussion

46.	Why stopping potential is independent of intensity and depends on frequency?
Answer» Why stopping potential is independent of intensity and depends on frequency?

Discussion

47.	25. A short is traveling at a rate of 100m/s is just able to Pierce a plank of 4cm thick, what velocity is required to just Pierce a plank of 9cm thick ?
Answer» 25. A short is traveling at a rate of 100m/s is just able to Pierce a plank of 4cm thick, what velocity is required to just Pierce a plank of 9cm thick ?

Discussion

48.	This phenomenon reverberation can be observed in:
Answer» This phenomenon reverberation can be observed in:

Discussion

49.	The focal lengths of the objective and eye lens of a telescope are respectively 200cm and 5cm. The maximum magnifying power of the telescope will be
Answer» The focal lengths of the objective and eye lens of a telescope are respectively 200cm and 5cm. The maximum magnifying power of the telescope will be

Discussion

50.	For two resources R1 and R2, connected in parallel, find the relative error in their equivalent resistance, if R1 =(50+-2)ohm and R2=(100+-3)ohm.
Answer» For two resources R1 and R2, connected in parallel, find the relative error in their equivalent resistance, if R1 =(50+-2)ohm and R2=(100+-3)ohm.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

If the solar constant is 1.4kW/m2, then the solar energy received by 1 m2 area in one hour is : (a) 5040 j (b) 504.0 kj (c) 5040 kj (d) 5.04 kj

An ideal gas expands isothermally from 10−3 m3 to 10−2 m3 at 300 K against a constant pressure of 105N m−2. The work done on the gas is

The correct set up for studying the dependence of the current on the potential difference across a resistor is:

Distinguish between:a. Farsightedness and Nearsightednessb. Concave lens and Convex lens

The poles of a horse-shoe magnet each of pole strength 2 Am are at 4 cm apart.(i)The magnetic moment of the horse-shoe magnet is (in Am2)

It is generally cold after a hail-storm than during and before the hail-storm. Give reason.

Lens maker's formula derivation

Which of the following is not a primary color?

59.A person uses +1.5 D glasses to have normal vision from 25 cm onwards. He uses a 20 D lens as a simple microscope to see an object. What will be the maximum magnifying power, is he uses the microscope together with his glasses (A) 6 (B) 3 (C) 10 (D) 9

A toy train of mass 1 kg moves with a constant velocity of 8 ms when connected to a battery of 8 volts. Find the current in the circuit if the battery was connected for 4 s. Assume no energy loss due to friction.

Which of the following pair(s) is/are true?

6.A solenoid wound over a rectangular frame. If all the linear dimensions of the frame are increased by a factor3 and the number of turns per unit length remains the same, the self inductance increased by a factor of -1) 3(2) 9(3) 27(4) 63

39.Factors that affect polarization and lattice energy

The K.E of a body in S.H.M is 16J when it is at mean position. If the amplitude of oscillations is 25 cm and mass of body m is 5 kg, the time period of its oscillations is

How is the power of a lens related to its focal length ?

12. There are two charges 2muC and -3 mu C.THe ratio of the force acting on them will be:- a. 2:3 2.1:1 3.3:2 4. 4:9

"The ignition temperature of a fuel is 80∘C". What does this mean?

Question 1Draw a schematic diagram of a circuit consisting of a battery of three cells of 2 V each, a 5Ω resistor, a 8Ω resistor, and a 12Ω resistor, and a plug key, all connected in series.

Upward acceleration of a rocket is given by (where v = speed of gas relative to rocket, M = mass of rocket and m = mass of fuel)

nta long solenoid is fabricated to closely winding wire of radius 0.5mm over a cylinderical frame so that the successive turns nearly touch each other ,the magnetic feild at the center of solenoid if it carries a current of 5An

A convex lens is given for which the minimum distance between an object and its real image is 40 cm . an object is placed at a distance of 15 cm from this lens . the linear magnification of adjustment will be

29.What is magnetic moment of Cr , Ti(I) , Mn(I)

Sun and sky appear to be red during sunset and sunrise because

what is the frequency of AabbCcDdee if parents are AabbCCddEe and AabbccDdee?

A person wears eyeglass of focal length -70 cm what is the far point of the person?

In Fig. 5.40, AO is the ray of white light falling on a prism PQR. Complete the diagram till the light emerges out from the prism and falls on the screen.

13.On a 30^° inclined smooth plane, a thin current carrying rod is placed parallel to the horizontal ground. The plane is located in a uniform vertical magnetic field of 0.15 T. The mass/length of the rod is 0.30 kg/m. Find the current required to keep the rod stationary.

52.two inductor coils of self inductance L1=10H and L2=20H are placed as shown. the mutual inductance of the coil is 3H . the equivalent inductance between AB of the system of coils options a)36H b)24H c)20/3H d)38/3H

Explain the construction and working of the following. Draw a neat diagram and label it.a. Electric motorb. Electric Generator (AC)

ntA telescope has an objective of focal length 50 cm and an eye piece of focal length 5 cm.the least distance of distinct vision is 25.the telescope is focussed for distinct vision on a scale 200 cm away.the separation btw the objective and eye piece isn

What is the process of thermonuclear fusion?

What does the law of reflection states about the incident ray, the normal at the point of incidence and the reflected ray? [1 MARK]

Differentiate between muscular force and magnetic force. [3 MARKS]

In a series electrical cicuit comprising a resistor made up of metallic wire, the ammeter reads 100mA. If the length of the wire is doubled, how will the current in the circuit change? Justify your answer.

An LR circuit draws a power of }560W from a }210V,60Hz AC source. The power factor of the circuit } is }0.8, Find the value of }L and }R

16. A nucleus disintegrates into two daughter nuclei with masses in the ratio 1:26 if the radius of the parent nucleus is r radius of the lighter daughter nucleus is a) r b) r/2 c) r/3 d) r/9

Why stopping potential is independent of intensity and depends on frequency?

25. A short is traveling at a rate of 100m/s is just able to Pierce a plank of 4cm thick, what velocity is required to just Pierce a plank of 9cm thick ?

This phenomenon reverberation can be observed in:

The focal lengths of the objective and eye lens of a telescope are respectively 200cm and 5cm. The maximum magnifying power of the telescope will be

For two resources R1 and R2, connected in parallel, find the relative error in their equivalent resistance, if R1 =(50+-2)ohm and R2=(100+-3)ohm.