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3201.

The current supplied by the battery in the circuit shown in figure is

Answer»

The current supplied by the battery in the circuit shown in figure is




3202.

Short note on force.

Answer» Short note on force.
3203.

What is Pseudo Force and when it is applied?

Answer» What is Pseudo Force and when it is applied?
3204.

Which of the following is/are the example(s) of Non-Contact force?

Answer»

Which of the following is/are the example(s) of Non-Contact force?


3205.

42.Why does potential or voltage of AC is multiple of 11 everytime.such that 220V, 1100V et

Answer» 42.Why does potential or voltage of AC is multiple of 11 everytime.such that 220V, 1100V et
3206.

A platform balance reads w, when a beaker partialyfilled with water is placed over it and a springbalance reads w when a ball is suspended fromthe spring balance when the suspended ball iscompletely immersed in the water contained in thebeaker already kept on the plateform balance, thereading of the spering balance decreases from wto wa. The platform balance will now read2(1) Wi W2(2) Wi+ Wwl(3) w, + W2+ W(4)w,+W2-W

Answer» A platform balance reads w, when a beaker partialyfilled with water is placed over it and a springbalance reads w when a ball is suspended fromthe spring balance when the suspended ball iscompletely immersed in the water contained in thebeaker already kept on the plateform balance, thereading of the spering balance decreases from wto wa. The platform balance will now read2(1) Wi W2(2) Wi+ Wwl(3) w, + W2+ W(4)w,+W2-W
3207.

Why planets do not collide with each other. As they also keep loosing energy, and they are also accerated.

Answer» Why planets do not collide with each other. As they also keep loosing energy, and they are also accerated.
3208.

Suppose a planet exist whose mass and radius both are half of those of earth, calculate acceleration due to gravity on the surface of this planet. g = 9.8 m/s^2

Answer» Suppose a planet exist whose mass and radius both are half of those of earth, calculate acceleration due to gravity on the surface of this planet. g = 9.8 m/s^2
3209.

a ball of mass 2kg is thrown with velocity 10m/s at an angle of 30^o to the horizontal and another ball of same mass is thrown at an angle of 60^{o }to the horizontal with same speed .the ratio of their ranges is

Answer» a ball of mass 2kg is thrown with velocity 10m/s at an angle of 30^o to the horizontal and another ball of same mass is thrown at an angle of 60^{o }to the horizontal with same speed .the ratio of their ranges is
3210.

If a bar magnet's head '1' is brought closer to another bar magnet's head '2', it was observed that they repel each other. What can be the poles of part 1 and part 2?

Answer»

If a bar magnet's head '1' is brought closer to another bar magnet's head '2', it was observed that they repel each other. What can be the poles of part 1 and part 2?


3211.

What should be the angle between the direction of force and the direction of motion of a body so that the work done is zero?

Answer»

What should be the angle between the direction of force and the direction of motion of a body so that the work done is zero?

3212.

The position of a particle along x-axis at time t is given by x=1+t-t^2. The distance travelled by the particle in first 2 seconds is _______?

Answer» The position of a particle along x-axis at time t is given by x=1+t-t^2. The distance travelled by the particle in first 2 seconds is _______?
3213.

XY2 dissociates as XY2(g) XY(g) + Y(g) Initial pressure of XY2 is 600 mm Hg. The total pressure at equilibrium is 800 mm Hg. Assuming volume of system to remain constant, the value of K, is

Answer» XY2 dissociates as XY2(g) XY(g) + Y(g) Initial pressure of XY2 is 600 mm Hg. The total pressure at equilibrium is 800 mm Hg. Assuming volume of system to remain constant, the value of K, is
3214.

An electric bulb of rating 50W is used for 8hr in one day. Find the number of units of energy used by the electric bulb.

Answer»

An electric bulb of rating 50W is used for 8hr in one day. Find the number of units of energy used by the electric bulb.


3215.

Define the terms 'frequency', 'wavelength' and 'velocity' of a sound wave. What is the relation between them?

Answer» Define the terms 'frequency', 'wavelength' and 'velocity' of a sound wave. What is the relation between them?
3216.

four particles of mass M1= 2m , M2= 4m , M3 =m ,and M4 are placed at the four corners of a square. What should be the value M4 so that the centre of mass of all the four particles are exactly at the centre of the square

Answer» four particles of mass M1= 2m , M2= 4m , M3 =m ,and M4 are placed at the four corners of a square. What should be the value M4 so that the centre of mass of all the four particles are exactly at the centre of the square
3217.

A planet is revolving round the sun in an elliptical orbit, if v is the velocity of the planet when its position vector from the sun is r, then areal velocity of the planet isa) I v x r Ib) 2 I r x v Ic) I 1/2(r x v) Id) None of these

Answer» A planet is revolving round the sun in an elliptical orbit, if v is the velocity of the planet when its position vector from the sun is r, then areal velocity of the planet is
a) I v x r I
b) 2 I r x v I
c) I 1/2(r x v) I
d) None of these
3218.

State the laws of flotation.

Answer» State the laws of flotation.
3219.

how a magnetic compass and dip circle align itself at poles and equator? explain.

Answer» how a magnetic compass and dip circle align itself at poles and equator? explain.
3220.

What is the relationship between wavelength and frequency in a medium?

Answer»

What is the relationship between wavelength and frequency in a medium?


3221.

The first of a month is the new moon day. On fifteenth of the same month, which of the following figures would represent the phase of the Moon?(a)(b)(c)(d)

Answer» The first of a month is the new moon day. On fifteenth of the same month, which of the following figures would represent the phase of the Moon?



(a)



(b)



(c)



(d)


3222.

The slope of velocity-time graph for motion with uniform velocity is equal to :

Answer»

The slope of velocity-time graph for motion with uniform velocity is equal to :


3223.

Find the resistance of a hollow cylindrical pipe of length 1 m whose inner and outer radii are 10 cm and 20 cm respectively. Assume that the cylindrical pipe is made of a material of resistivity 2×10−8 Ω m.

Answer»

Find the resistance of a hollow cylindrical pipe of length 1 m whose inner and outer radii are 10 cm and 20 cm respectively. Assume that the cylindrical pipe is made of a material of resistivity 2×108 Ω m.

3224.

What do you mean by the term fluid pressure ?

Answer»

What do you mean by the term fluid pressure ?

3225.

A cubical vessel of height 1m is full of water. The minimum work done in taking water out from the vessel will be

Answer» A cubical vessel of height 1m is full of water. The minimum work done in taking water out from the vessel will be
3226.

19.The length of of a seconds hand in a watch is 1m.The change in velocity of its tip in 15s is what?

Answer» 19.The length of of a seconds hand in a watch is 1m.The change in velocity of its tip in 15s is what?
3227.

8.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» 8.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
3228.

How do you think they weighed elephants in olden times?

Answer»

How do you think they weighed elephants in olden times?

3229.

A bus decelerating with 4m/s2 changes its speed from 60 m s-1 to a certain value in 5 s. The final speed is:

Answer»

A bus decelerating with 4m/s2 changes its speed from 60 m s-1 to a certain value in 5 s. The final speed is:


3230.

The maximum vertical 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 2/3rd that of earth and radius one quarter that of earth. A. 1.5 m B. 3m C. 6m D. 7.5m

Answer» The maximum vertical 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 2/3rd that of earth and radius one quarter that of earth. A. 1.5 m B. 3m C. 6m D. 7.5m
3231.

numerical: In an instrument there are 25 divisions on the vernier scale which have length of 24 divisions on the main scale. 1cm on main scale is divided in 20 equal parts. Find the least count.

Answer»

numerical: In an instrument there are 25 divisions on the vernier scale which have length of 24 divisions on the main scale. 1cm on main scale is divided in 20 equal parts. Find the least count.

3232.

if the same volume of lead and iron is immersed in water,then do they experience the same buoyant force?

Answer» if the same volume of lead and iron is immersed in water,then do they experience the same buoyant force?
3233.

the position of a body moving along x-axis as a function of time t is given as x = t^2- 2t metre. the distance travelled by the body in first 2 seconds is

Answer» the position of a body moving along x-axis as a function of time t is given as x = t^2- 2t metre. the distance travelled by the body in first 2 seconds is
3234.

Can convex mirror form a real image? If yes explain the condition

Answer» Can convex mirror form a real image? If yes explain the condition
3235.

What is force defination related with real life eg.

Answer»

What is force defination related with real life eg.

3236.

An ice cube contains a large air bubble. The cube is floating on the horizontal surface of water. What will happen to the water level when ice melt

Answer» An ice cube contains a large air bubble. The cube is floating on the horizontal surface of water. What will happen to the water level when ice melt
3237.

Newton's second law of motion gives the measure of

Answer»

Newton's second law of motion gives the measure of


3238.

Virtual images are formed by diverging rays. Concave mirror is converging mirror, then why are virtual images formed when the object is placed between pole and focus of concave mirror ?

Answer» Virtual images are formed by diverging rays. Concave mirror is converging mirror, then why are virtual images formed when the object is placed between pole and focus of concave mirror ?
3239.

a body of mass m is projected vertically with a velocity u. If it passes through the point of projection with speed u/2, the work done by air resistance is

Answer» a body of mass m is projected vertically with a velocity u. If it passes through the point of projection with speed u/2, the work done by air resistance is
3240.

When a white light is incident on a red object, then which colour of light did the body absorb ?

Answer»

When a white light is incident on a red object, then which colour of light did the body absorb ?

3241.

A narrow uniform glass tube 80 cm long and open at both ends is half immersed in mercury. Then, the top of the tube is closed and it is taken out of mercury. A column of mercury 22 cmlong then remains in the tube. What is the atmospheric pressure?

Answer» A narrow uniform glass tube 80 cm long and open at both ends is half immersed in mercury. Then, the top of the tube is closed and it is taken out of mercury. A column of mercury 22 cmlong then remains in the tube. What is the atmospheric pressure?
3242.

What is meant by instantaneous acceleration and instantaneous velocity?

Answer»

What is meant by instantaneous acceleration and instantaneous velocity?

3243.

An isolated solid metallic sphere of radius R is given an electric charge. Which of the graphs below correctly shows the way in which the electric field E varies with distance x from the centre of the sphere?

Answer»

An isolated solid metallic sphere of radius R is given an electric charge. Which of the graphs below correctly shows the way in which the electric field E varies with distance x from the centre of the sphere?

3244.

a charged particle moves in a gravity free space without change in velocity. which of the following is not possible in that space? (1) E=0 , B=0 (2) E, B is not equal to 0 (3) E=0, B is not equal to 0 (4) E is not equal to zero, B=

Answer» a charged particle moves in a gravity free space without change in velocity. which of the following is not possible in that space? (1) E=0 , B=0 (2) E, B is not equal to 0 (3) E=0, B is not equal to 0 (4) E is not equal to zero, B=
3245.

A musical instrument is producing a continuous note. This note cannot be heard by a person having a normal hearing range. This note must then be passing through : (a) water (b) wax (c) vacuum (d) empty vessel

Answer»

A musical instrument is producing a continuous note. This note cannot be heard by a person having a normal hearing range. This note must then be passing through :

(a) water

(b) wax

(c) vacuum

(d) empty vessel

3246.

Question 3What are the advantages of connecting electrical devices in parallel with the battery instead of connecting them in series?

Answer» Question 3

What are the advantages of connecting electrical devices in parallel with the battery instead of connecting them in series?
3247.

Working of electric generator and electric motor

Answer» Working of electric generator and electric motor
3248.

what is unit of angular acceleration.

Answer»

what is unit of angular acceleration.

3249.

A car moving towards north at a speed of 10m/s turns right within 10s maintaining the same speed. Average acceleration of the car during this time interval is

Answer» A car moving towards north at a speed of 10m/s turns right within 10s maintaining the same speed. Average acceleration of the car during this time interval is
3250.

Will any object move if same amount of force is applied on every side

Answer» Will any object move if same amount of force is applied on every side