16569 + Interview Questions in Physics Page 31 InterviewSolution

1501.	The depletion grows wider in case of reverse biased on junction diode then why is even a small current leaking through the junction
Answer» The depletion grows wider in case of reverse biased on junction diode then why is even a small current leaking through the junction

Discussion

1502.	Question 36 What is the importance of forest as a resource?
Answer» Question 36 What is the importance of forest as a resource?

Discussion

1503.	What is RAAS system?
Answer» What is RAAS system?

Discussion

1504.	Fill in the blanks(a) Longer line in the symbols of an electric cell represents its _______terminal(b) The combination of two or more cells is called a _____(c) When current is switched 'ON' in a room heater, it ________(d) ________ is a safety device based on the heating effect of electric current.
Answer» Fill in the blanks (a) Longer line in the symbols of an electric cell represents its _______terminal (b) The combination of two or more cells is called a _____ (c) When current is switched 'ON' in a room heater, it ________ (d) ________ is a safety device based on the heating effect of electric current.

Discussion

1505.	How is a polio vaccine given in India?
Answer» How is a polio vaccine given in India?

Discussion

1506.	What type of lens must be placed at XY so that the image shifts from I to I′?
Answer» What type of lens must be placed at XY so that the image shifts from I to $I^{^{'}}$ ?

1506.

What type of lens must be placed at XY so that the image shifts from I to I′?

Answer»

What type of lens must be placed at XY so that the image shifts from I to $I^{^{'}}$ ?

Discussion

1507.	On & off switch is provided with
Answer» On & off switch is provided with

Discussion

1508.	The relationship between the mechanical advantage (MA), the velocity ratio (VR) and the efficiency (n) is:
Answer» The relationship between the mechanical advantage (MA), the velocity ratio (VR) and the efficiency (n) is:

Discussion

1509.	If an incident ray suffers the deviation of 180 degrees, aren't the reflected and incident ray supposed to be parallel?
Answer» If an incident ray suffers the deviation of 180 degrees, aren't the reflected and incident ray supposed to be parallel?

Discussion

1510.	a magnetic field of 3000 gauss acts at right angle to the coil and area is 100cm2 with 100 turns, the coil is removed from the field at 0.1 sec, find the emf
Answer» a magnetic field of 3000 gauss acts at right angle to the coil and area is 100cm2 with 100 turns, the coil is removed from the field at 0.1 sec, find the emf

Discussion

1511.	Draw diagrams illustrating each of the following situation:(a) Three straight lines which do not pass through a fixed point.(b) A point and rays emanating from that point such that the angle between any two adjacent rays is an acute angle.(c) Two angles which are not adjacent angles, but still supplementary.(d) Three points in the plane which are equidistant from each other.
Answer» Draw diagrams illustrating each of the following situation: (a) Three straight lines which do not pass through a fixed point. (b) A point and rays emanating from that point such that the angle between any two adjacent rays is an acute angle. (c) Two angles which are not adjacent angles, but still supplementary. (d) Three points in the plane which are equidistant from each other.

1511.

Draw diagrams illustrating each of the following situation:(a) Three straight lines which do not pass through a fixed point.(b) A point and rays emanating from that point such that the angle between any two adjacent rays is an acute angle.(c) Two angles which are not adjacent angles, but still supplementary.(d) Three points in the plane which are equidistant from each other.

Answer»

Draw diagrams illustrating each of the following situation:

(a) Three straight lines which do not pass through a fixed point.

(b) A point and rays emanating from that point such that the angle between any two adjacent rays is an acute angle.

(c) Two angles which are not adjacent angles, but still supplementary.

(d) Three points in the plane which are equidistant from each other.

Discussion

1512.	If the absolute refractive index of water is 43 and that of glass is 32. Find the refractive index of glass with respect to water.
Answer» If the absolute refractive index of water is $\frac{4}{3}$ and that of glass is $\frac{3}{2}$ . Find the refractive index of glass with respect to water.

Discussion

1513.	ntWhat is the electric field vs radius graph in a ring?n ntn
Answer» ntWhat is the electric field vs radius graph in a ring?n ntn

Discussion

1514.	48. A body is being moved from rest along a straight line by a machine delivering constant power . The distance covered by body in time (t) is proportional to
Answer» 48. A body is being moved from rest along a straight line by a machine delivering constant power . The distance covered by body in time (t) is proportional to

Discussion

1515.	What changes in the environment had Wangari Maathai noticed after growing up?
Answer» What changes in the environment had Wangari Maathai noticed after growing up?

Discussion

1516.	WHAT IS INTERA O CULAR PRESSURE ?
Answer» WHAT IS INTERA O CULAR PRESSURE ?

Discussion

1517.	Two cars get closer by 8 m every second while travelling in opposite directions. They get closer by 0.8m while travelling in same direction . wht are speeds of two car ?
Answer» Two cars get closer by 8 m every second while travelling in opposite directions. They get closer by 0.8m while travelling in same direction . wht are speeds of two car ?

Discussion

1518.	If you hold a piece of iron wire with a pair of tongs inside a candle flame or a Bunsen burner flame, what will you observe? Will it produce a flame?
Answer» If you hold a piece of iron wire with a pair of tongs inside a candle flame or a Bunsen burner flame, what will you observe? Will it produce a flame?

Discussion

1519.	Four equal point charges Q each are placed in the xy plane at (0,2),(4,2),(4,−2) and (0,−2). The work required to put a fifth charge Q at the origin of the coordinate system will be
Answer» Four equal point charges $Q$ each are placed in the $x y$ plane at $(0, 2), (4, 2), (4, - 2) and (0, - 2)$ . The work required to put a fifth charge $Q$ at the origin of the coordinate system will be

Discussion

1520.	The value of resistor R, when total power dissipated in the circuit is 150 W, is
Answer» The value of resistor $R$ , when total power dissipated in the circuit is $150 W$ , is

Discussion

1521.	19.The order of magnitude of speed of light in cgs system is- 1. 8 2. 10 3. 6 4. 7
Answer» 19.The order of magnitude of speed of light in cgs system is- 1. 8 2. 10 3. 6 4. 7

Discussion

1522.	Observe the below mentioned figure and calculate x in such a way that the seesaw would be in equilibrium.5
Answer» Observe the below mentioned figure and calculate $x$ in such a way that the seesaw would be in equilibrium. 5

Discussion

1523.	At a particular power station, the following energy change takes place: Potential energy -> Kinetic energy -> Mechanical energy -> Electrical energy What type of power station it is?
Answer» At a particular power station, the following energy change takes place: Potential energy -> Kinetic energy -> Mechanical energy -> Electrical energy What type of power station it is?

Discussion

1524.	Name the three forms of kinetic energy and give one example of each.
Answer» Name the three forms of kinetic energy and give one example of each.

Discussion

1525.	Among the following energy sources, which one is least used for generating electricity in India?
Answer» Among the following energy sources, which one is least used for generating electricity in India?

Discussion

1526.	For anideal gas, temperature varies as:T=K+βV2Where K and β are positive constants and ‘V′ is the molar volume of the gas, if the minimum pressure (Pmin) of one mole of an ideal gas is expressed as:PMin=nRaβbKcThen, find the value of n+a+bn−a+b−c
Answer» For anideal gas, temperature varies as: $T = K + β V^{2}$ Where $K$ and $β$ are positive constants and $‘ V^{'}$ is the molar volume of the gas, if the minimum pressure $(P_{min})$ of one mole of an ideal gas is expressed as: $P_{Min} = n R^{a} β^{b} K^{c}$ Then, find the value of $\frac{n + a + b}{n - a + b - c}$

Discussion

1527.	The rate of change of torque with deflection (dτdθ) is maximum for a magnetic suspended freely in a uniform magnetic field when θ is
Answer» The rate of change of torque with deflection $(\frac{d τ}{d θ})$ is maximum for a magnetic suspended freely in a uniform magnetic field when $θ$ is

Discussion

1528.	State the energy changes taking place when the water stored in the dam produces electric current on passing through electric generator.
Answer» State the energy changes taking place when the water stored in the dam produces electric current on passing through electric generator.

Discussion

1529.	Which of the following is NOT a function of a modem?
Answer» Which of the following is NOT a function of a modem?

Discussion

1530.	a telescope has an objective lens of focal length 200 centimetre and an eyepiece with focal length 2 centimetres. if this telescope is used to see a 50 metre tall building at a dis†an ce of 2 kilometre what is the height of image of the building formed by the objective lens
Answer» a telescope has an objective lens of focal length 200 centimetre and an eyepiece with focal length 2 centimetres. if this telescope is used to see a 50 metre tall building at a dis†an ce of 2 kilometre what is the height of image of the building formed by the objective lens

Discussion

1531.	Fill in the blanks : (a) Water is optically ___ than air. (b) Air is optically ___ than glass. (c) When a ray of light travels from water to air, it bends ___ the normal. (d) When a ray of light travels from air to glass, it bends ___ the normal. (e) When white light passes through a prism, it ___ (f) The splitting of white light into its constituent colours is called ___ (g) A ___ mirror is obtained on silvering the outer surface of a part of a hollow glass sphere. (h) Radius of curvature of a spherical mirror is ___ its focal length. (i) The angle of incidence for a ray of light passing through the centre of curvature of aspherical mirror is ___ (j) A ___ mirror always forms a virtual image. (k) A concave mirror forms a virtual image for an object placed ___ Ans. (a) denser (b) rarer (c) away from (d) towards (e) disperses (f) dispersion (g) concave (h) two times (i) 0∘ (j) convex (k) between pole and focus
Answer» Fill in the blanks : (a) Water is optically ___ than air. (b) Air is optically ___ than glass. (c) When a ray of light travels from water to air, it bends ___ the normal. (d) When a ray of light travels from air to glass, it bends ___ the normal. (e) When white light passes through a prism, it ___ (f) The splitting of white light into its constituent colours is called ___ (g) A ___ mirror is obtained on silvering the outer surface of a part of a hollow glass sphere. (h) Radius of curvature of a spherical mirror is ___ its focal length. (i) The angle of incidence for a ray of light passing through the centre of curvature of aspherical mirror is ___ (j) A ___ mirror always forms a virtual image. (k) A concave mirror forms a virtual image for an object placed ___ Ans. (a) denser (b) rarer (c) away from (d) towards (e) disperses (f) dispersion (g) concave (h) two times (i) $0^{\circ}$ (j) convex (k) between pole and focus

1531.

Fill in the blanks : (a) Water is optically _ than air. (b) Air is optically _ than glass. (c) When a ray of light travels from water to air, it bends _ the normal. (d) When a ray of light travels from air to glass, it bends _ the normal. (e) When white light passes through a prism, it _ (f) The splitting of white light into its constituent colours is called _ (g) A _ mirror is obtained on silvering the outer surface of a part of a hollow glass sphere. (h) Radius of curvature of a spherical mirror is _ its focal length. (i) The angle of incidence for a ray of light passing through the centre of curvature of aspherical mirror is _ (j) A _ mirror always forms a virtual image. (k) A concave mirror forms a virtual image for an object placed ___ Ans. (a) denser (b) rarer (c) away from (d) towards (e) disperses (f) dispersion (g) concave (h) two times (i) 0∘ (j) convex (k) between pole and focus

Answer»

Fill in the blanks :

(a) Water is optically ___ than air.

(b) Air is optically ___ than glass.

(c) When a ray of light travels from water to air, it bends ___ the normal.

(d) When a ray of light travels from air to glass, it bends ___ the normal.

(e) When white light passes through a prism, it ___

(f) The splitting of white light into its constituent colours is called ___

(g) A ___ mirror is obtained on silvering the outer surface of a part of a hollow glass sphere.

(h) Radius of curvature of a spherical mirror is ___ its focal length.

(i) The angle of incidence for a ray of light passing through the centre of curvature of aspherical mirror is ___

(j) A ___ mirror always forms a virtual image.

(k) A concave mirror forms a virtual image for an object placed ___

Ans. (a) denser (b) rarer (c) away from (d) towards (e) disperses (f) dispersion

(g) concave (h) two times (i) $0^{\circ}$ (j) convex (k) between pole and focus

Discussion

1532.	Two objects are in resonance, then:
Answer» Two objects are in resonance, then:

Discussion

1533.	In the following circuit, calculate the electric current shown in ammeter, flowing through the 20.5 Ω resistor.0.36605
Answer» In the following circuit, calculate the electric current shown in ammeter, flowing through the $20.5 Ω$ resistor. 0.36605

Discussion

1534.	Is the acceleration of a body exhibiting uniform circular motion, variable or constant ?
Answer» Is the acceleration of a body exhibiting uniform circular motion, variable or constant ?

Discussion

1535.	a convex lens forms a real image of a point object at a dis†an ce of 50 cm from the convex lens .A concave lens is placed 10 cm behind the convex lens on the image side.on placing a plane mirror on the image side and facinf the conca
Answer» a convex lens forms a real image of a point object at a dis†an ce of 50 cm from the convex lens .A concave lens is placed 10 cm behind the convex lens on the image side.on placing a plane mirror on the image side and facinf the conca

Discussion

1536.	Calorimetry is defined as
Answer» Calorimetry is defined as

Discussion

1537.

A steam power plant working on Carnot cycle operates between 320∘C, 10 Mpa and 31∘C and 6 kpa. The following data table is available P T(∘C) hf(kJ/kg) hg(kJ/kg) sf(kJ/kgK) sg(kJ/kgK) 10 MPa 320∘C 1407 2725 3.35 5.61 6kPa 31∘C 136 2560 0.48 8.40 Back work ratio of the cycle is ______.0.37

Answer»

A steam power plant working on Carnot cycle operates between $320^{\circ} C$ , 10 Mpa and $31^{\circ} C$ and 6 kpa. The following data table is available

P	$T (^{\circ} C)$	$h_{f} (k J / k g)$	$h_{g} (k J / k g)$	$s_{f} (k J / k g K)$	$s_{g} (k J / k g K)$
10 MPa	$320^{\circ} C$	1407	2725	3.35	5.61
6kPa	$31^{\circ} C$	136	2560	0.48	8.40

Back work ratio of the cycle is ______.

0.37

Discussion

1538.	The latent heat of fusion of solid water at 0∘ is 80 cal/g. How much heat is required to convert 4 g of ice at 0∘C to water at 0∘C ?
Answer» The latent heat of fusion of solid water at $0^{\circ}$ is $80 c a l / g$ . How much heat is required to convert $4 g$ of ice at $0^{\circ}$ C to water at $0^{\circ}$ C ?

Discussion

1539.	A copper wire is stretched so as to increase its length by 0.2%. Calculate the percentage change in the resis†an ce of the wire
Answer» A copper wire is stretched so as to increase its length by 0.2%. Calculate the percentage change in the resis†an ce of the wire

Discussion

1540.	28.If the speed of a charge particles moving through a magnetic field is increased then they radius of curvature of it circular path will
Answer» 28.If the speed of a charge particles moving through a magnetic field is increased then they radius of curvature of it circular path will

Discussion

1541.	why does focal lenght of a lens changed when kept in another medium?
Answer» why does focal lenght of a lens changed when kept in another medium?

Discussion

1542.	(a) A circular coll of 30 turns and radius 8.0 cm carrying a currentof 6.0 A is suspended vertically in a uniform horizontal magneticfleld of magnitude 1.0 T. The field lines make an angle of 60^° with the normal of the coil.calculate the magnitude of the counter torque that must be applied to prevent the coil from turnin
Answer» (a) A circular coll of 30 turns and radius 8.0 cm carrying a currentof 6.0 A is suspended vertically in a uniform horizontal magneticfleld of magnitude 1.0 T. The field lines make an angle of 60^° with the normal of the coil.calculate the magnitude of the counter torque that must be applied to prevent the coil from turnin

Discussion

1543.	State the factors on which the force experienced by a current carrying conductor placed in a uniform magnetic field depends upon.
Answer» State the factors on which the force experienced by a current carrying conductor placed in a uniform magnetic field depends upon.

Discussion

1544.	On increasing the resistance in a circuit, the current in it : (a) decreases (b) increases (c) remains unchanged (d) nothing can be said.
Answer» On increasing the resistance in a circuit, the current in it : (a) decreases (b) increases (c) remains unchanged (d) nothing can be said.

1544.

On increasing the resistance in a circuit, the current in it : (a) decreases (b) increases (c) remains unchanged (d) nothing can be said.

Answer»

On increasing the resistance in a circuit, the current in it :

(a) decreases (b) increases

(c) remains unchanged (d) nothing can be said.

Discussion

1545.	Why mass is independent of speed
Answer» Why mass is independent of speed

Discussion

1546.	How does the duration of a force affect the change in velocity?
Answer» How does the duration of a force affect the change in velocity?

Discussion

1547.	In Tyndall effect, the colour of light that is scattered depends on:
Answer» In Tyndall effect, the colour of light that is scattered depends on:

Discussion

1548.	Electric motor converts:
Answer» Electric motor converts:

Discussion

1549.	USING PERCENTAGE METHOD OF ERROR CALCULATION(AND NOT BY DIFFERNTIATION METHOD) find combination oF two resistors of R1 = 100+-3 and R2 = 200+-4 connected in parallel. USE ONLY PERCENTAGE METHOD
Answer» USING PERCENTAGE METHOD OF ERROR CALCULATION(AND NOT BY DIFFERNTIATION METHOD) find combination oF two resistors of R1 = 100+-3 and R2 = 200+-4 connected in parallel. USE ONLY PERCENTAGE METHOD

Discussion

1550.	Convex lens of very short focal length will make:
Answer» Convex lens of very short focal length will make:

Discussion

Explore topic-wise InterviewSolutions in .

The depletion grows wider in case of reverse biased on junction diode then why is even a small current leaking through the junction

Question 36 What is the importance of forest as a resource?

What is RAAS system?

How is a polio vaccine given in India?

What type of lens must be placed at XY so that the image shifts from I to I′?

On &amp; off switch is provided with

The relationship between the mechanical advantage (MA), the velocity ratio (VR) and the efficiency (n) is:

If an incident ray suffers the deviation of 180 degrees, aren't the reflected and incident ray supposed to be parallel?

a magnetic field of 3000 gauss acts at right angle to the coil and area is 100cm2 with 100 turns, the coil is removed from the field at 0.1 sec, find the emf

If the absolute refractive index of water is 43 and that of glass is 32. Find the refractive index of glass with respect to water.

ntWhat is the electric field vs radius graph in a ring?n ntn

48. A body is being moved from rest along a straight line by a machine delivering constant power . The distance covered by body in time (t) is proportional to

What changes in the environment had Wangari Maathai noticed after growing up?

WHAT IS INTERA O CULAR PRESSURE ?

Two cars get closer by 8 m every second while travelling in opposite directions. They get closer by 0.8m while travelling in same direction . wht are speeds of two car ?

If you hold a piece of iron wire with a pair of tongs inside a candle flame or a Bunsen burner flame, what will you observe? Will it produce a flame?​

Four equal point charges Q each are placed in the xy plane at (0,2),(4,2),(4,−2) and (0,−2). The work required to put a fifth charge Q at the origin of the coordinate system will be

The value of resistor R, when total power dissipated in the circuit is 150 W, is

19.The order of magnitude of speed of light in cgs system is- 1. 8 2. 10 3. 6 4. 7

Observe the below mentioned figure and calculate x in such a way that the seesaw would be in equilibrium.5

At a particular power station, the following energy change takes place: Potential energy -&gt; Kinetic energy -&gt; Mechanical energy -&gt; Electrical energy What type of power station it is?

Name the three forms of kinetic energy and give one example of each.

Among the following energy sources, which one is least used for generating electricity in India?

For anideal gas, temperature varies as:T=K+βV2Where K and β are positive constants and ‘V′ is the molar volume of the gas, if the minimum pressure (Pmin) of one mole of an ideal gas is expressed as:PMin=nRaβbKcThen, find the value of n+a+bn−a+b−c

The rate of change of torque with deflection (dτdθ) is maximum for a magnetic suspended freely in a uniform magnetic field when θ is

State the energy changes taking place when the water stored in the dam produces electric current on passing through electric generator.

Which of the following is NOT a function of a modem?

a telescope has an objective lens of focal length 200 centimetre and an eyepiece with focal length 2 centimetres. if this telescope is used to see a 50 metre tall building at a dis†an ce of 2 kilometre what is the height of image of the building formed by the objective lens

Two objects are in resonance, then:

In the following circuit, calculate the electric current shown in ammeter, flowing through the 20.5 Ω resistor.0.36605

Is the acceleration of a body exhibiting uniform circular motion, variable or constant ?

a convex lens forms a real image of a point object at a dis†an ce of 50 cm from the convex lens .A concave lens is placed 10 cm behind the convex lens on the image side.on placing a plane mirror on the image side and facinf the conca

Calorimetry is defined as

A steam power plant working on Carnot cycle operates between 320∘C, 10 Mpa and 31∘C and 6 kpa. The following data table is available P T(∘C) hf(kJ/kg) hg(kJ/kg) sf(kJ/kgK) sg(kJ/kgK) 10 MPa 320∘C 1407 2725 3.35 5.61 6kPa 31∘C 136 2560 0.48 8.40 Back work ratio of the cycle is ______.0.37

The latent heat of fusion of solid water at 0∘ is 80 cal/g. How much heat is required to convert 4 g of ice at 0∘C to water at 0∘C ?

A copper wire is stretched so as to increase its length by 0.2%. Calculate the percentage change in the resis†an ce of the wire

28.If the speed of a charge particles moving through a magnetic field is increased then they radius of curvature of it circular path will

why does focal lenght of a lens changed when kept in another medium?

State the factors on which the force experienced by a current carrying conductor placed in a uniform magnetic field depends upon.

On increasing the resistance in a circuit, the current in it : (a) decreases (b) increases (c) remains unchanged (d) nothing can be said.

Why mass is independent of speed

How does the duration of a force affect the change in velocity?

In Tyndall effect, the colour of light that is scattered depends on:

Electric motor converts:

USING PERCENTAGE METHOD OF ERROR CALCULATION(AND NOT BY DIFFERNTIATION METHOD) find combination oF two resistors of R1 = 100+-3 and R2 = 200+-4 connected in parallel. USE ONLY PERCENTAGE METHOD

Convex lens of very short focal length will make:

On & off switch is provided with

If you hold a piece of iron wire with a pair of tongs inside a candle flame or a Bunsen burner flame, what will you observe? Will it produce a flame?

At a particular power station, the following energy change takes place: Potential energy -> Kinetic energy -> Mechanical energy -> Electrical energy What type of power station it is?