16569 + Interview Questions in Physics

1.	we see that there is spin due to movement of electrons around nucleus but in ortho and para hydrogen there is spin of protons but ho
Answer» we see that there is spin due to movement of electrons around nucleus but in ortho and para hydrogen there is spin of protons but ho

Discussion

2.	In diffuse reflection, is the angle of incidence equal to angle of reflection?
Answer» In diffuse reflection, is the angle of incidence equal to angle of reflection?

Discussion

3.	In the figure shown below, the magnetic induction at point O is,
Answer» In the figure shown below, the magnetic induction at point $O$ is,

Discussion

4.	44. right hand thumb rule
Answer» 44. right hand thumb rule

Discussion

5.	Question 3Where should an object be placed in front of a convex lens to get a real image of the size of the object?(a) At the principal focus of the lens(b) At twice the focal length(c) At infinity(d) Between the optical centre of the lens and its principal focus
Answer» Question 3 Where should an object be placed in front of a convex lens to get a real image of the size of the object? (a) At the principal focus of the lens (b) At twice the focal length (c) At infinity (d) Between the optical centre of the lens and its principal focus

Discussion

6.	(a) Draw a circuit diagram showing two lamps, one cell and a switch connected in series. (b) How can you change the brightness of the lamps?
Answer» (a) Draw a circuit diagram showing two lamps, one cell and a switch connected in series. (b) How can you change the brightness of the lamps?

Discussion

7.	the extension in a string is x.the speed of sound in the streched strings is v.if the extension in the string is extended 1.5x.the speed of sound will b
Answer» the extension in a string is x.the speed of sound in the streched strings is v.if the extension in the string is extended 1.5x.the speed of sound will b

Discussion

8.	111. A coil of inductance 0.5 H and resistance 100 ohm is connected to a 240 V,50 Hz ac supply (1) what is the maximum current in the coil (2) what is the lag between the voltage maximum and the current maximum
Answer» 111. A coil of inductance 0.5 H and resistance 100 ohm is connected to a 240 V,50 Hz ac supply (1) what is the maximum current in the coil (2) what is the lag between the voltage maximum and the current maximum

Discussion

9.	how does counter current mechanism help to maintain a concentration gradient?
Answer» how does counter current mechanism help to maintain a concentration gradient?

Discussion

10.	8.nd the resistance of variable cross section wire having radious small section a & large section b. And length of wire L. (resistivity of wire is given rho)
Answer» 8.nd the resistance of variable cross section wire having radious small section a & large section b. And length of wire L. (resistivity of wire is given rho)

Discussion

11.	A three hinge arch consisting two quadrantal parts AC and CB of radii R1 and R2 is shown in figure below. If it is subjected to a central point load W at crown then horizontal thrust at each support is__________W. 0.5
Answer» A three hinge arch consisting two quadrantal parts $A C$ and $C B$ of radii $R_{1}$ and $R_{2}$ is shown in figure below. If it is subjected to a central point load $W$ at crown then horizontal thrust at each support is__________W. 0.5

Discussion

12.	What are the disadvantages of wave energy?
Answer» What are the disadvantages of wave energy?

Discussion

13.	Two like magnetic poles :
Answer» Two like magnetic poles :

Discussion

14.	If the temperature of body is increased by 100degree celsius then the % decrease in its density is
Answer» If the temperature of body is increased by 100degree celsius then the % decrease in its density is

Discussion

15.	The distance between the cathode (filament) and the target in an X-ray tube is 15 m. If the cut-off wavelength is 30 pm, find the electric field between the cathode and the target.(hc=1.24×10−6 eV)
Answer» The distance between the cathode (filament) and the target in an X-ray tube is $15 m$ . If the cut-off wavelength is $30 pm$ , find the electric field between the cathode and the target. $(h c = 1.24 \times 10^{- 6} eV)$

Discussion

16.	Focal length of and equiconvex lens is numeris cally equal to its radius the speed of light in lens material i
Answer» Focal length of and equiconvex lens is numeris cally equal to its radius the speed of light in lens material i

Discussion

17.	when earth revolve around the sun then 1 angular momentum is conserved 2 linear momentum is not conserved 3 external torque is ero 4 all of these
Answer» when earth revolve around the sun then 1 angular momentum is conserved 2 linear momentum is not conserved 3 external torque is ero 4 all of these

Discussion

18.	Two resistors having resistance 4Ω and 6Ω are connected in parallel. Find their equivalent resistance.
Answer» Two resistors having resistance $4 Ω$ and $6 Ω$ are connected in parallel. Find their equivalent resistance.

Discussion

19.	Four students A, B, C and D performed an experiment to determine the focal length of a concave mirror by using a lighted candle kept at a considerable distance as the object. They represented the position of image by drawing the following diagrams:Which diagram describes the correct position of the image of the candle?(1) A(2) B(3) C(4) D
Answer» Four students A, B, C and D performed an experiment to determine the focal length of a concave mirror by using a lighted candle kept at a considerable distance as the object. They represented the position of image by drawing the following diagrams: Which diagram describes the correct position of the image of the candle? (1) A (2) B (3) C (4) D

Discussion

20.	Household appliances are connected in series.
Answer» Household appliances are connected in series.

Discussion

21.	If an object is placed at a distance of 10 cm in from of a plane mirror, how far would it be from its image?
Answer» If an object is placed at a distance of 10 cm in from of a plane mirror, how far would it be from its image?

Discussion

22.	If alternating current of 60 Hz frequency is flowing through inductance of L = 1 mH and drop in delta Vl is 0.6 then alternating current:-(1) 1/pi A (2) 5/pi A (3) 50/pi A (4) 20/pi A
Answer» If alternating current of 60 Hz frequency is flowing through inductance of L = 1 mH and drop in delta Vl is 0.6 then alternating current:- (1) 1/pi A (2) 5/pi A (3) 50/pi A (4) 20/pi A

Discussion

23.	6.A light wave enters from medium 1 into medium to its velocity in the second medium is double than that of an first medium for total internal reflection the angle of incidence must be greater than. 1)30* 2)60* 3)45* 4) 90*
Answer» 6.A light wave enters from medium 1 into medium to its velocity in the second medium is double than that of an first medium for total internal reflection the angle of incidence must be greater than. 1)30* 2)60* 3)45* 4) 90*

Discussion

24.	A light ray is travelling from air to glass. The reflected and refracted are perpendicular to each other. If the angle of incidence in air is i, which of the following is a correct relation for refractive index of glass?
Answer» A light ray is travelling from air to glass. The reflected and refracted are perpendicular to each other. If the angle of incidence in air is $i,$ which of the following is a correct relation for refractive index of glass?

Discussion

25.	Identical packets are dropped from two airplanes, one above the equator and another above the North Pole, both at height ‘h’. Assuming all conditions are identical, will those packets take the same time to reach the surface of the earth. Justify your answer.
Answer» Identical packets are dropped from two airplanes, one above the equator and another above the North Pole, both at height ‘h’. Assuming all conditions are identical, will those packets take the same time to reach the surface of the earth. Justify your answer.

Discussion

26.	Two concentric coils of 10 turns each are situated in the same plane. Their radii are 2cm & 4cm & they carry respectively ,0.2 & 0.3A current in opposite directions. The magnetic field (in Wb/m2) at centre is ?
Answer» Two concentric coils of 10 turns each are situated in the same plane. Their radii are 2cm & 4cm & they carry respectively ,0.2 & 0.3A current in opposite directions. The magnetic field (in Wb/m2) at centre is ?

Discussion

27.	If an electron revolves in the path of radius of 0.5 * 10 ^-10m at a frequency of 5 * 10 ^15 cycles s^-1 ,then find the electric current in the circle.
Answer» If an electron revolves in the path of radius of 0.5 * 10 ^-10m at a frequency of 5 * 10 ^15 cycles s^-1 ,then find the electric current in the circle.

Discussion

28.	State four differences between a single fixed pulley and a single movable pulley.
Answer» State four differences between a single fixed pulley and a single movable pulley.

Discussion

29.	The signal x(t) is defined asx(t)=⎧⎪⎪⎨⎪⎪⎩5sint,0<t<πt+2π<t<2πt−22π<t<3π0,otherwiseThe energy in the signal is _______.293.64
Answer» The signal x(t) is defined as x(t)= $⎧ ⎪⎪ ⎨ ⎪⎪ ⎩ \begin{matrix} 5 s i n t, & 0 < t < π t + 2 & π < t < 2 π t - 2 & 2 π < t < 3 π 0, & o t h e r w i s e \end{matrix}$ The energy in the signal is _______. 293.64

Discussion

30.	20. The monomer of buns s rubber
Answer» 20. The monomer of buns s rubber

Discussion

31.	In the given figure, the object distance is and radius of curvature of the mirror is .
Answer» In the given figure, the object distance is and radius of curvature of the mirror is .

Discussion

32.	62.1) If y= 2/sin theta + \sqrt{}3 cos theta, then the minimum value of y is 2) what is the formula of average velocity?
Answer» 62.1) If y= 2/sin theta + \sqrt{}3 cos theta, then the minimum value of y is 2) what is the formula of average velocity?

Discussion

33.	Question 10In our country, vast tracts of forests are cleared and a single species of plant is cultivated. This practice promotes (a) biodiversity in the area (b) monoculture in the area (c) growth of natural forest (d) preserves the natural ecosystem in the area
Answer» Question 10 In our country, vast tracts of forests are cleared and a single species of plant is cultivated. This practice promotes (a) biodiversity in the area (b) monoculture in the area (c) growth of natural forest (d) preserves the natural ecosystem in the area

Discussion

34.	Which particles constitute the electric current in a metallic conductor?
Answer» Which particles constitute the electric current in a metallic conductor?

Discussion

35.	What are the uses of bio-diesel?
Answer» What are the uses of bio-diesel?

Discussion

36.	If light ray from air enters into 3 mediums, with refracted angle as 450, 300 and 600 respectively. Find out the denser medium.
Answer» If light ray from air enters into 3 mediums, with refracted angle as $45^{0}$ , $30^{0}$ and $60^{0}$ respectively. Find out the denser medium.

36.

If light ray from air enters into 3 mediums, with refracted angle as 450, 300 and 600 respectively. Find out the denser medium.

Answer»

If light ray from air enters into 3 mediums, with refracted angle as $45^{0}$ , $30^{0}$ and $60^{0}$ respectively. Find out the denser medium.

Discussion

37.	(a) Name two factors on which the specific resistance of a wire depends? (b) Two wires A and B are made of copper. The wire A is long and thin, while the wire B is short and thick. Which will have more specific resistance?
Answer» (a) Name two factors on which the specific resistance of a wire depends? (b) Two wires A and B are made of copper. The wire A is long and thin, while the wire B is short and thick. Which will have more specific resistance?

Discussion

38.	ntLight is incident from glass (RI 1.5) to air. Sketch the variation of deviation d with the angle of incidence for 0
Answer» ntLight is incident from glass (RI 1.5) to air. Sketch the variation of deviation d with the angle of incidence for 0<<90^°.n

Discussion

39.	Fill in the following blanks with suitable words : (a) Having two eyes gives a ___ field of view. (b) Having two eyes enables us to judge ___ more accurately.
Answer» Fill in the following blanks with suitable words : (a) Having two eyes gives a ___ field of view. (b) Having two eyes enables us to judge ___ more accurately.

Discussion

40.	137.A particle of mass M at rest decays into two masses m1 amd m2 with non-zero velocities.The ratio of de Broglie wavelengths of the particles lampda1/lampda2
Answer» 137.A particle of mass M at rest decays into two masses m1 amd m2 with non-zero velocities.The ratio of de Broglie wavelengths of the particles lampda1/lampda2

Discussion

41.	What is undetermined form
Answer» What is undetermined form

Discussion

42.	A triangular wire frame (each side2m) is placed in a region of time variant magnetic field having dB/dt = 3 T/s. The magnetic field is perpendicular to the plane of the triangle. The base of the triangle AB has a resistance 1Ω while the other two sides have resistance 2Ω each. The magnitude of potential difference between the points A and B will be A) 0.4 V(B) 0.6 V(C) 1.2 V(D) None
Answer» A triangular wire frame (each side2m) is placed in a region of time variant magnetic field having dB/dt = 3 T/s. The magnetic field is perpendicular to the plane of the triangle. The base of the triangle AB has a resistance 1Ω while the other two sides have resistance 2Ω each. The magnitude of potential difference between the points A and B will be A) 0.4 V(B) 0.6 V(C) 1.2 V(D) None

Discussion

43.	A pole 4m high driven into the bottom of a lake is 1m above the water. Determine the length of the shadow of the pole on the bottom of the lake if the sun rays make an angle of 45^° with the water surface. The refractive index of water is 4/3.
Answer» A pole 4m high driven into the bottom of a lake is 1m above the water. Determine the length of the shadow of the pole on the bottom of the lake if the sun rays make an angle of 45^° with the water surface. The refractive index of water is 4/3.

Discussion

44.	A 100V voltmeter of internal resistance 20kohm in series with a high resistance R is connected to 110V line.the voltmeter reads 5V ,the value of R is A) 210 kohm B)315 kohm C) 420 kohm D) 4440 kohm
Answer» A 100V voltmeter of internal resistance 20kohm in series with a high resistance R is connected to 110V line.the voltmeter reads 5V ,the value of R is A) 210 kohm B)315 kohm C) 420 kohm D) 4440 kohm

Discussion

45.	Where is the vitreous humour located in the human eye?
Answer» Where is the vitreous humour located in the human eye?

Discussion

46.	A solenoid of length 10 cm and radius 1 cmcontains 200 turns and carries a current of 10 AThe value of pole strength of each pole is(1) 2A m(2) 2T Am(3) 4Tt A m(4) 10T A m
Answer» A solenoid of length 10 cm and radius 1 cmcontains 200 turns and carries a current of 10 AThe value of pole strength of each pole is(1) 2A m(2) 2T Am(3) 4Tt A m(4) 10T A m

Discussion

47.	If the rate of change in the volume of a sphere is equal to the rate of change in its radius, then the radius is equal to
Answer» If the rate of change in the volume of a sphere is equal to the rate of change in its radius, then the radius is equal to

Discussion

48.	The size of the image of an object, which is at ∞, is formed by a convex lens of focal length 30 cm is 2 cm. If a concave lens of focal length 20 cm is placed between the convex lens and the image at a distance of 26 cm from the convex lens. Find the new size of the image-
Answer» The size of the image of an object, which is at $\infty,$ is formed by a convex lens of focal length $30 cm$ is $2 cm .$ If a concave lens of focal length $20 cm$ is placed between the convex lens and the image at a distance of $26 cm$ from the convex lens. Find the new size of the image-

Discussion

49.	7. A heavy chain of length 1 m and weight 20 kg hangs vertically with one end attached to a peg and carries a block of mass 10 kg at the other end. Find the workdone in winding 50 cm of chain round the peg.
Answer» 7. A heavy chain of length 1 m and weight 20 kg hangs vertically with one end attached to a peg and carries a block of mass 10 kg at the other end. Find the workdone in winding 50 cm of chain round the peg.

Discussion

50.	When two bulbs 60W and 40W are connected in series,then power of combination will be
Answer» When two bulbs 60W and 40W are connected in series,then power of combination will be

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

we see that there is spin due to movement of electrons around nucleus but in ortho and para hydrogen there is spin of protons but ho

In diffuse reflection, is the angle of incidence equal to angle of reflection?

In the figure shown below, the magnetic induction at point O is,

44. right hand thumb rule

Question 3Where should an object be placed in front of a convex lens to get a real image of the size of the object?(a) At the principal focus of the lens(b) At twice the focal length(c) At infinity(d) Between the optical centre of the lens and its principal focus

(a) Draw a circuit diagram showing two lamps, one cell and a switch connected in series. (b) How can you change the brightness of the lamps?

the extension in a string is x.the speed of sound in the streched strings is v.if the extension in the string is extended 1.5x.the speed of sound will b

111. A coil of inductance 0.5 H and resistance 100 ohm is connected to a 240 V,50 Hz ac supply (1) what is the maximum current in the coil (2) what is the lag between the voltage maximum and the current maximum

how does counter current mechanism help to maintain a concentration gradient?

8.nd the resistance of variable cross section wire having radious small section a & large section b. And length of wire L. (resistivity of wire is given rho)

A three hinge arch consisting two quadrantal parts AC and CB of radii R1 and R2 is shown in figure below. If it is subjected to a central point load W at crown then horizontal thrust at each support is__________W. 0.5

What are the disadvantages of wave energy?

Two like magnetic poles :

If the temperature of body is increased by 100degree celsius then the % decrease in its density is

The distance between the cathode (filament) and the target in an X-ray tube is 15 m. If the cut-off wavelength is 30 pm, find the electric field between the cathode and the target.(hc=1.24×10−6 eV)

Focal length of and equiconvex lens is numeris cally equal to its radius the speed of light in lens material i

when earth revolve around the sun then 1 angular momentum is conserved 2 linear momentum is not conserved 3 external torque is ero 4 all of these

Two resistors having resistance 4Ω and 6Ω are connected in parallel. Find their equivalent resistance.

Household appliances are connected in series.

If an object is placed at a distance of 10 cm in from of a plane mirror, how far would it be from its image?

If alternating current of 60 Hz frequency is flowing through inductance of L = 1 mH and drop in delta Vl is 0.6 then alternating current:-(1) 1/pi A (2) 5/pi A (3) 50/pi A (4) 20/pi A

6.A light wave enters from medium 1 into medium to its velocity in the second medium is double than that of an first medium for total internal reflection the angle of incidence must be greater than. 1)30* 2)60* 3)45* 4) 90*

A light ray is travelling from air to glass. The reflected and refracted are perpendicular to each other. If the angle of incidence in air is i, which of the following is a correct relation for refractive index of glass?

Identical packets are dropped from two airplanes, one above the equator and another above the North Pole, both at height ‘h’. Assuming all conditions are identical, will those packets take the same time to reach the surface of the earth. Justify your answer.

Two concentric coils of 10 turns each are situated in the same plane. Their radii are 2cm & 4cm & they carry respectively ,0.2 & 0.3A current in opposite directions. The magnetic field (in Wb/m2) at centre is ?

If an electron revolves in the path of radius of 0.5 * 10 ^-10m at a frequency of 5 * 10 ^15 cycles s^-1 ,then find the electric current in the circle.

State four differences between a single fixed pulley and a single movable pulley.

The signal x(t) is defined asx(t)=⎧⎪⎪⎨⎪⎪⎩5sint,0&lt;t&lt;πt+2π&lt;t&lt;2πt−22π&lt;t&lt;3π0,otherwiseThe energy in the signal is _______.293.64

20. The monomer of buns s rubber

In the given figure, the object distance is and radius of curvature of the mirror is .

62.1) If y= 2/sin theta + \sqrt{}3 cos theta, then the minimum value of y is 2) what is the formula of average velocity?

Question 10In our country, vast tracts of forests are cleared and a single species of plant is cultivated. This practice promotes (a) biodiversity in the area (b) monoculture in the area (c) growth of natural forest (d) preserves the natural ecosystem in the area

Which particles constitute the electric current in a metallic conductor?

What are the uses of bio-diesel?

If light ray from air enters into 3 mediums, with refracted angle as 450, 300 and 600 respectively. Find out the denser medium.

(a) Name two factors on which the specific resistance of a wire depends? (b) Two wires A and B are made of copper. The wire A is long and thin, while the wire B is short and thick. Which will have more specific resistance?

ntLight is incident from glass (RI 1.5) to air. Sketch the variation of deviation d with the angle of incidence for 0

Fill in the following blanks with suitable words : (a) Having two eyes gives a ___ field of view. (b) Having two eyes enables us to judge ___ more accurately.

137.A particle of mass M at rest decays into two masses m1 amd m2 with non-zero velocities.The ratio of de Broglie wavelengths of the particles lampda1/lampda2

What is undetermined form

A pole 4m high driven into the bottom of a lake is 1m above the water. Determine the length of the shadow of the pole on the bottom of the lake if the sun rays make an angle of 45^° with the water surface. The refractive index of water is 4/3.

A 100V voltmeter of internal resistance 20kohm in series with a high resistance R is connected to 110V line.the voltmeter reads 5V ,the value of R is A) 210 kohm B)315 kohm C) 420 kohm D) 4440 kohm

Where is the vitreous humour located in the human eye?

A solenoid of length 10 cm and radius 1 cmcontains 200 turns and carries a current of 10 AThe value of pole strength of each pole is(1) 2A m(2) 2T Am(3) 4Tt A m(4) 10T A m

If the rate of change in the volume of a sphere is equal to the rate of change in its radius, then the radius is equal to

The size of the image of an object, which is at ∞, is formed by a convex lens of focal length 30 cm is 2 cm. If a concave lens of focal length 20 cm is placed between the convex lens and the image at a distance of 26 cm from the convex lens. Find the new size of the image-

7. A heavy chain of length 1 m and weight 20 kg hangs vertically with one end attached to a peg and carries a block of mass 10 kg at the other end. Find the workdone in winding 50 cm of chain round the peg.

When two bulbs 60W and 40W are connected in series,then power of combination will be

The signal x(t) is defined asx(t)=⎧⎪⎪⎨⎪⎪⎩5sint,0<t<πt+2π<t<2πt−22π<t<3π0,otherwiseThe energy in the signal is _______.293.64

Fill in the following blanks with suitable words : (a) Having two eyes gives a _ field of view. (b) Having two eyes enables us to judge _ more accurately.