13232 + Interview Questions in Physics Page 26 InterviewSolution

1251.	A farmer moves along the boundary of a square ground of side 50m in 200 sec. The magnitude of displacement of the farmer at the end of 11 minutes 40 seconds from his initial point is
Answer» A farmer moves along the boundary of a square ground of side 50m in 200 sec. The magnitude of displacement of the farmer at the end of 11 minutes 40 seconds from his initial point is

Discussion

1252.	4. A body of mass 5kg is acted upon by two perpendicular forces of 8N and 6N, find the magnitude and directionof the acceleration.
Answer» 4. A body of mass 5kg is acted upon by two perpendicular forces of 8N and 6N, find the magnitude and directionof the acceleration.

Discussion

1253.	118.A uniform chain of length L and mass M lying on a smooth table and one third of its length is hanging vertically down over the edge of table . if g is acceleration due to gravity,the minimum work required to pull the hanging part of the chain on the table is
Answer» 118.A uniform chain of length L and mass M lying on a smooth table and one third of its length is hanging vertically down over the edge of table . if g is acceleration due to gravity,the minimum work required to pull the hanging part of the chain on the table is

Discussion

1254.	5. The maximum vertical distance through whicha full dressed astronaut can jump on the earthis 0.5m. Estimate the maximum verticaldistance through which he can jump on themoon, which has a mean density 2/3 rd that ofthe earth and radius one quarter that of theearth.(a) 1.5 m(b) 3 m(c) 6 m(d)7.5m
Answer» 5. The maximum vertical distance through which a full dressed astronaut can jump on the earth is 0.5m. Estimate the maximum vertical distance through which he can jump on the moon, which has a mean density 2/3 rd that of the earth and radius one quarter that of the earth. (a) 1.5 m (b) 3 m (c) 6 m (d)7.5m

Discussion

1255.	An arrow fired from a bow attains a maximum height of 5m from the level it is released. If the mass of the arrow is 500 grams, work done by the bow on the arrow is greater than which of the following? (Assume, g = 10 m/s2)
Answer» An arrow fired from a bow attains a maximum height of 5m from the level it is released. If the mass of the arrow is 500 grams, work done by the bow on the arrow is greater than which of the following? (Assume, g = 10 m/s²)

Discussion

1256.	A block of weight 10 N is placed on a horizontal table. A person pushes the block from the top by exerting a downward force of 5 N on it. Find the force exerted by the table on the block in equilibrium.
Answer» A block of weight $10 N$ is placed on a horizontal table. A person pushes the block from the top by exerting a downward force of $5 N$ on it. Find the force exerted by the table on the block in equilibrium.

Discussion

1257.	Represent a LONGITUDINAL WAVE graphically with the x-axis and y-axis labelled, and represent the crest,trough, compression and rarefaction.
Answer» Represent a LONGITUDINAL WAVE graphically with the x-axis and y-axis labelled, and represent the crest,trough, compression and rarefaction.

Discussion

1258.	A lorry and a car moving with the same K.E. are brought to rest by applying the same retarding force, then
Answer» A lorry and a car moving with the same K.E. are brought to rest by applying the same retarding force, then

1258.

A lorry and a car moving with the same K.E. are brought to rest by applying the same retarding force, then

Answer»

A lorry and a car moving with the same K.E. are brought to rest by applying the same retarding force, then

Discussion

1259.	The importance of Newton's first law of motion is that:
Answer» The importance of Newton's first law of motion is that:

Discussion

1260.	When a body is immersed in a liquid, the buoyant force acts on the body:
Answer» When a body is immersed in a liquid, the buoyant force acts on the body:

Discussion

1261.	In the experiment on tracing the path of a ray of light passing through a rectangular glass slab, the correct setting of the protractor (D), for measuring the angle of incidence (∠i), and the angle of emergence (∠e) correspond, respectively, to diagrams:(1) K and M(2) K and N(3) L and M(4) L and N
Answer» In the experiment on tracing the path of a ray of light passing through a rectangular glass slab, the correct setting of the protractor (D), for measuring the angle of incidence (∠i), and the angle of emergence (∠e) correspond, respectively, to diagrams: (1) K and M (2) K and N (3) L and M (4) L and N

Discussion

1262.	Let the charge flowing through a conductor for 5 s be 10 C. Find the current flowing through the conductor.
Answer» Let the charge flowing through a conductor for $5 s$ be $10 C$ . Find the current flowing through the conductor.

Discussion

1263.	An ammeter has 20 divisions between 0 mark and 2 A mark on its scale. The least count of this ammeter is:(A) 0.01 A(2) 0.02 A(3) 0.1 A(4) 0.2 A
Answer» An ammeter has 20 divisions between 0 mark and 2 A mark on its scale. The least count of this ammeter is: (A) 0.01 A (2) 0.02 A (3) 0.1 A (4) 0.2 A

Discussion

1264.	70.Find the capacitance between P and O. Each Capacitor has Capacitance C. Refer to the attachment for figure and options.
Answer» 70.Find the capacitance between P and O. Each Capacitor has Capacitance C. Refer to the attachment for figure and options.

Discussion

1265.	A wire has a diameter of 0.5 mm and a resistivity of 1.6 × 10−6 ohm cm. How much of this wire would be required to make a 10 ohm coil?
Answer» A wire has a diameter of 0.5 mm and a resistivity of 1.6 × $10^{- 6}$ ohm cm. How much of this wire would be required to make a 10 ohm coil?

Discussion

1266.	A particle is projected horizontally from a tower with velocity v0. Wind is blowing in opposite direction and is providing a constant horizontal acceleration a0. If particle strikes the ground vertically then height of tower
Answer» A particle is projected horizontally from a tower with velocity v0. Wind is blowing in opposite direction and is providing a constant horizontal acceleration a0. If particle strikes the ground vertically then height of tower

Discussion

1267.	If a resistor of one kilo ohm is connected in the circuit the ammeter connected to it reads 5 amp. What is the potential difference across the resistor.
Answer» If a resistor of one kilo ohm is connected in the circuit the ammeter connected to it reads 5 amp. What is the potential difference across the resistor.

Discussion

1268.	The property of bodies to resist a change in their state of rest or of motion is known as:
Answer» The property of bodies to resist a change in their state of rest or of motion is known as:

Discussion

1269.	A uniform string of length 20 m is suspended from a rigid support. A short wave pulse is introduced at its lowest end. It starts moving up the string. The time taken to reach the support is (take g=10 ms−2)
Answer» A uniform string of length $20 m$ is suspended from a rigid support. A short wave pulse is introduced at its lowest end. It starts moving up the string. The time taken to reach the support is (take $g = 10 m s^{- 2}$ )

Discussion

1270.	1) How does an ammeter works and its internal structure. 2) How a voltmeter works and its internal structure. 3) In a circuit with resistors in parallel,how can we control the amount of current that will flow through each resistor? 4) How does a rheostat work?
Answer» 1) How does an ammeter works and its internal structure. 2) How a voltmeter works and its internal structure. 3) In a circuit with resistors in parallel,how can we control the amount of current that will flow through each resistor? 4) How does a rheostat work?

Discussion

1271.	1) what is uniform circular motion? 2) what is non uniform circular motion?
Answer» 1) what is uniform circular motion? 2) what is non uniform circular motion?

1271.

1) what is uniform circular motion? 2) what is non uniform circular motion?

Answer»

1) what is uniform circular motion?

2) what is non uniform circular motion?

Discussion

1272.	The co-ordinates of the image of point object P formed by a concave mirror of radius of curvature 20 cm (consider paraxial rays only) as shown in the figure is.
Answer» The co-ordinates of the image of point object $P$ formed by a concave mirror of radius of curvature $20 cm$ (consider paraxial rays only) as shown in the figure is.

Discussion

1273.	A vertical U-tube of uniform inner crass-section contains mercury in both sides of its atms. A water (density 1 g/cm3) column of length 20 cm is poured into one of its arms. Oil of unknown density is poured into the other arm uptp height of 19.5 cm such that upper surfaes of oil and water are in the same horizontal level. The density of oil is approximately (Density of mercury is 13.6 g/cm) is 13.6 g/cm3)
Answer» A vertical U-tube of uniform inner crass-section contains mercury in both sides of its atms. A water (density 1 g/cm3) column of length 20 cm is poured into one of its arms. Oil of unknown density is poured into the other arm uptp height of 19.5 cm such that upper surfaes of oil and water are in the same horizontal level. The density of oil is approximately (Density of mercury is 13.6 g/cm) is 13.6 g/cm3)

Discussion

1274.	the charge on the atoms containing 8 proton 9 neutron 9 electro
Answer» the charge on the atoms containing 8 proton 9 neutron 9 electro

Discussion

1275.	A man fires a gun while standing between 2 parallel hills. If he hears the first echo after 2s and second echo after 3s, then what is the distance between the hill (velocity of sound is 330m/s)
Answer» A man fires a gun while standing between 2 parallel hills. If he hears the first echo after 2s and second echo after 3s, then what is the distance between the hill (velocity of sound is 330m/s)

Discussion

1276.	State the Kepler's law which is represented by the relation r3∝T2.
Answer» State the Kepler's law which is represented by the relation $r^{3} \propto T^{2}$ .

Discussion

1277.	A mango is falling from the branch of a tree at a height h from the ground. After it has fallen a height of h2, it will possess:
Answer» A mango is falling from the branch of a tree at a height $h$ from the ground. After it has fallen a height of $\frac{h}{2}$ , it will possess:

Discussion

1278.	47.An object is dropped from the top of a tower. It travels a distance x in the first second of its motion and a distance 7x in last second. Height of the tower is 1) 40m 2) 45m 3) 75m 4) 80m
Answer» 47.An object is dropped from the top of a tower. It travels a distance x in the first second of its motion and a distance 7x in last second. Height of the tower is 1) 40m 2) 45m 3) 75m 4) 80m

Discussion

1279.	Two objects of masses 10 kg and 15kg are moving in the same direction with different velocity is 5 metre per minute and 10 metre per minute . if they collide and stick together and move the common velocity then magnitude of their common velocity is
Answer» Two objects of masses 10 kg and 15kg are moving in the same direction with different velocity is 5 metre per minute and 10 metre per minute . if they collide and stick together and move the common velocity then magnitude of their common velocity is

Discussion

1280.	Three masses 5 kg, 4 kg and 7 kg are aligned in a straight line as shown below. Find the net gravitational force on 4 kg?
Answer» Three masses $5 k g$ , $4 k g$ and $7 k g$ are aligned in a straight line as shown below. Find the net gravitational force on $4 k g$ ?

Discussion

1281.	To a person sitting in a train which is moving along a straight track, the platform appears to be __________.
Answer» To a person sitting in a train which is moving along a straight track, the platform appears to be __________.

Discussion

1282.	A hollow metal of mass 180.6g contains cavity of volume 2.5cm3. This metal when placed in water displaces 25cm3 of water. Find specific gravity of metal.
Answer» A hollow metal of mass 180.6g contains cavity of volume 2.5cm³. This metal when placed in water displaces 25cm³ of water. Find specific gravity of metal.

Discussion

1283.	A U-tube contains water and oil separated by mercury. The mercury columns in the two arms are at the same level with 10 cm of water in one arm and 12.5 cm of oil in the other, as shown in the figure. What is the relative density of oil?
Answer» A U-tube contains water and oil separated by mercury. The mercury columns in the two arms are at the same level with 10 cm of water in one arm and 12.5 cm of oil in the other, as shown in the figure. What is the relative density of oil?

Discussion

1284.	Which of the following statement(s) is/are correct regarding a sound wave?
Answer» Which of the following statement(s) is/are correct regarding a sound wave?

Discussion

1285.	a ball of mass m hits a floor with a speed root3/root2 m/s making an angle of incidence 45degree with the normal.the coefficient of restituition is e=1/root3.the speed of the reflected ball and angle of reflection of the ball are:
Answer» a ball of mass m hits a floor with a speed root3/root2 m/s making an angle of incidence 45degree with the normal.the coefficient of restituition is e=1/root3.the speed of the reflected ball and angle of reflection of the ball are:

Discussion

1286.	ray diagram which show large field of view for convex mirror?
Answer» ray diagram which show large field of view for convex mirror?

Discussion

1287.	A body revolves with constant speed v in a circular path of radius r . What is the magnitude of its average acceleration during motion between two points in diametrically opposite direction?
Answer» A body revolves with constant speed v in a circular path of radius r . What is the magnitude of its average acceleration during motion between two points in diametrically opposite direction?

Discussion

1288.	A refrigerator, whose cefficient offore xtractheat from the water inside it at the rateof 200 J/cycle. The amount of the heat exhaustedto the room, per cycle ishe(1) 250 J (2) 400 J(3) 680 J(4) 180 J
Answer» A refrigerator, whose cefficient offore xtractheat from the water inside it at the rateof 200 J/cycle. The amount of the heat exhaustedto the room, per cycle ishe(1) 250 J (2) 400 J(3) 680 J(4) 180 J

Discussion

1289.	Fill in the blanks .(a) Sound is generated by the rhythmic ............. of an object.(b) The frequency of sound is measured in ............... .(c) If ............. of sound is decreased , its loudness also decreases.(d) A medium is necessary for .................... of sound.
Answer» Fill in the blanks . (a) Sound is generated by the rhythmic ............. of an object. (b) The frequency of sound is measured in ............... . (c) If ............. of sound is decreased , its loudness also decreases. (d) A medium is necessary for .................... of sound.

Discussion

1290.	What is diameter of aperture of a plano convex lens ?
Answer» What is diameter of aperture of a plano convex lens ?

Discussion

1291.	The motion of a body falling from rest in a medium is given by equation dv/dt = 1-2v the velocity at any time t is?
Answer» The motion of a body falling from rest in a medium is given by equation dv/dt = 1-2v the velocity at any time t is?

Discussion

1292.	Two small charged ball are suspended with two insulating string of length 'l' from same point. assume mass of ball is 'm' and the length of string is very large. If the whole system is emerged in kerosene having dielectric cons†an t two then, what should be the angle theta with vertical in equilibrium. ( relative density of kerosene is rho)
Answer» Two small charged ball are suspended with two insulating string of length 'l' from same point. assume mass of ball is 'm' and the length of string is very large. If the whole system is emerged in kerosene having dielectric cons†an t two then, what should be the angle theta with vertical in equilibrium. ( relative density of kerosene is rho)

Discussion

1293.	34.The momentum of a body is doubled. what is the percentage increase in kinetic energy?
Answer» 34.The momentum of a body is doubled. what is the percentage increase in kinetic energy?

Discussion

1294.	The acceleration of a particle, varies with time { according to the relation a=-mω^2\operatorname{sinω t . The { displacement of this particle at a time t will be
Answer» The acceleration of a particle, varies with time { according to the relation a=-mω^2\operatorname{sinω t . The { displacement of this particle at a time t will be

Discussion

1295.	How does the electron flow in a direction opposite to its original flow in an lead storage battery?
Answer» How does the electron flow in a direction opposite to its original flow in an lead storage battery?

Discussion

1296.	A body is thrown vertical upward with speed 25m/s,^-2 how many distance it cover in third second is
Answer» A body is thrown vertical upward with speed 25m/s,^-2 how many distance it cover in third second is

Discussion

1297.	Question 2Will current flow more easily through a thick wire or a thin wire of the same material, when connected to the same source? Why?
Answer» Question 2 Will current flow more easily through a thick wire or a thin wire of the same material, when connected to the same source? Why?

Discussion

1298.	Ratio of Energy per unit length at the nodes in travelling and stationary wave of equal amplitude and frequency
Answer» Ratio of Energy per unit length at the nodes in travelling and stationary wave of equal amplitude and frequency

Discussion

1299.	The ___ of a body is the quantity of matter it contains.
Answer» The ___ of a body is the quantity of matter it contains.

Discussion

1300.	Find the initial velocity of a car which is stopped in 10 seconds by applying brakes. The retardation due to brakes is 2.5m/s2 .
Answer» Find the initial velocity of a car which is stopped in 10 seconds by applying brakes. The retardation due to brakes is 2.5 $m / s^{2}$ .

1300.

Find the initial velocity of a car which is stopped in 10 seconds by applying brakes. The retardation due to brakes is 2.5m/s2 .

Answer»

Find the initial velocity of a car which is stopped in 10 seconds by applying brakes. The retardation due to brakes is 2.5 $m / s^{2}$

.

Discussion

Explore topic-wise InterviewSolutions in .

A farmer moves along the boundary of a square ground of side 50m in 200 sec. The magnitude of displacement of the farmer at the end of 11 minutes 40 seconds from his initial point is

4. A body of mass 5kg is acted upon by two perpendicular forces of 8N and 6N, find the magnitude and directionof the acceleration.

118.A uniform chain of length L and mass M lying on a smooth table and one third of its length is hanging vertically down over the edge of table . if g is acceleration due to gravity,the minimum work required to pull the hanging part of the chain on the table is

5. The maximum vertical distance through whicha full dressed astronaut can jump on the earthis 0.5m. Estimate the maximum verticaldistance through which he can jump on themoon, which has a mean density 2/3 rd that ofthe earth and radius one quarter that of theearth.(a) 1.5 m(b) 3 m(c) 6 m(d)7.5m

An arrow fired from a bow attains a maximum height of 5m from the level it is released. If the mass of the arrow is 500 grams, work done by the bow on the arrow is greater than which of the following? (Assume, g = 10 m/s2)

A block of weight 10 N is placed on a horizontal table. A person pushes the block from the top by exerting a downward force of 5 N on it. Find the force exerted by the table on the block in equilibrium.

Represent a LONGITUDINAL WAVE graphically with the x-axis and y-axis labelled, and represent the crest,trough, compression and rarefaction.

A lorry and a car moving with the same K.E. are brought to rest by applying the same retarding force, then

The importance of Newton's first law of motion is that:

When a body is immersed in a liquid, the buoyant force acts on the body:

Let the charge flowing through a conductor for 5 s be 10 C. Find the current flowing through the conductor.

An ammeter has 20 divisions between 0 mark and 2 A mark on its scale. The least count of this ammeter is:(A) 0.01 A(2) 0.02 A(3) 0.1 A(4) 0.2 A

70.Find the capacitance between P and O. Each Capacitor has Capacitance C. Refer to the attachment for figure and options.

A wire has a diameter of 0.5 mm and a resistivity of 1.6 × 10−6 ohm cm. How much of this wire would be required to make a 10 ohm coil?

A particle is projected horizontally from a tower with velocity v0. Wind is blowing in opposite direction and is providing a constant horizontal acceleration a0. If particle strikes the ground vertically then height of tower

If a resistor of one kilo ohm is connected in the circuit the ammeter connected to it reads 5 amp. What is the potential difference across the resistor.

The property of bodies to resist a change in their state of rest or of motion is known as:

A uniform string of length 20 m is suspended from a rigid support. A short wave pulse is introduced at its lowest end. It starts moving up the string. The time taken to reach the support is (take g=10 ms−2)

1) How does an ammeter works and its internal structure. 2) How a voltmeter works and its internal structure. 3) In a circuit with resistors in parallel,how can we control the amount of current that will flow through each resistor? 4) How does a rheostat work?

1) what is uniform circular motion? 2) what is non uniform circular motion?

The co-ordinates of the image of point object P formed by a concave mirror of radius of curvature 20 cm (consider paraxial rays only) as shown in the figure is.

the charge on the atoms containing 8 proton 9 neutron 9 electro

A man fires a gun while standing between 2 parallel hills. If he hears the first echo after 2s and second echo after 3s, then what is the distance between the hill (velocity of sound is 330m/s)

State the Kepler's law which is represented by the relation r3∝T2.

A mango is falling from the branch of a tree at a height h from the ground. After it has fallen a height of h2, it will possess:

47.An object is dropped from the top of a tower. It travels a distance x in the first second of its motion and a distance 7x in last second. Height of the tower is 1) 40m 2) 45m 3) 75m 4) 80m

Two objects of masses 10 kg and 15kg are moving in the same direction with different velocity is 5 metre per minute and 10 metre per minute . if they collide and stick together and move the common velocity then magnitude of their common velocity is

Three masses 5 kg, 4 kg and 7 kg are aligned in a straight line as shown below. Find the net gravitational force on 4 kg?

To a person sitting in a train which is moving along a straight track, the platform appears to be __________.

A hollow metal of mass 180.6g contains cavity of volume 2.5cm3. This metal when placed in water displaces 25cm3 of water. Find specific gravity of metal.

A U-tube contains water and oil separated by mercury. The mercury columns in the two arms are at the same level with 10 cm of water in one arm and 12.5 cm of oil in the other, as shown in the figure. What is the relative density of oil?

Which of the following statement(s) is/are correct regarding a sound wave?

a ball of mass m hits a floor with a speed root3/root2 m/s making an angle of incidence 45degree with the normal.the coefficient of restituition is e=1/root3.the speed of the reflected ball and angle of reflection of the ball are:

ray diagram which show large field of view for convex mirror?

A body revolves with constant speed v in a circular path of radius r . What is the magnitude of its average acceleration during motion between two points in diametrically opposite direction?

A refrigerator, whose cefficient offore xtractheat from the water inside it at the rateof 200 J/cycle. The amount of the heat exhaustedto the room, per cycle ishe(1) 250 J (2) 400 J(3) 680 J(4) 180 J

Fill in the blanks .(a) Sound is generated by the rhythmic ............. of an object.(b) The frequency of sound is measured in ............... .(c) If ............. of sound is decreased , its loudness also decreases.(d) A medium is necessary for .................... of sound.

What is diameter of aperture of a plano convex lens ?

The motion of a body falling from rest in a medium is given by equation dv/dt = 1-2v the velocity at any time t is?

34.The momentum of a body is doubled. what is the percentage increase in kinetic energy?

The acceleration of a particle, varies with time { according to the relation a=-mω^2\operatorname{sinω t . The { displacement of this particle at a time t will be

How does the electron flow in a direction opposite to its original flow in an lead storage battery?

A body is thrown vertical upward with speed 25m/s,^-2 how many distance it cover in third second is

Question 2Will current flow more easily through a thick wire or a thin wire of the same material, when connected to the same source? Why?

Ratio of Energy per unit length at the nodes in travelling and stationary wave of equal amplitude and frequency

The ___ of a body is the quantity of matter it contains.

Find the initial velocity of a car which is stopped in 10 seconds by applying brakes. The retardation due to brakes is 2.5m/s2 .