9478 + Interview Questions in Physics Page 156 InterviewSolution

7751.	Electrolytes conduct electricity due to the movement of : (a) electrodes (b) atoms (c) electrons (d) ions
Answer» Electrolytes conduct electricity due to the movement of : (a) electrodes (b) atoms (c) electrons (d) ions

Discussion

7752.	What is the difference between electricity and electric charge?
Answer» What is the difference between electricity and electric charge?

Discussion

7753.	Why does a piece of cork float in water while aa coi sinks in water?
Answer» Why does a piece of cork float in water while aa coi sinks in water?

Discussion

7754.	How does pressure decreases by increasing the height?
Answer» How does pressure decreases by increasing the height?

Discussion

7755.	x = 2+\- 0.1 y = 2+\-0.2 find the x and y based on error
Answer» x = 2+\- 0.1 y = 2+\-0.2 find the x and y based on error

7755.

x = 2+\- 0.1 y = 2+\-0.2 find the x and y based on error

Answer»

x = 2+\- 0.1

y = 2+\-0.2 find the x and y based on error

Discussion

7756.	Can you please send me a video on potential energy.
Answer» Can you please send me a video on potential energy.

Discussion

7757.	Put a straw in a glass containing some water, such a little amount ofenters through the straw, then put the finger over the other end. Lift the straw up. a) What do you observe? b) Explain the phenomenon. c) If a hole is made on the upper part of the straw, what happens and why?
Answer» Put a straw in a glass containing some water, such a little amount ofenters through the straw, then put the finger over the other end. Lift the straw up. a) What do you observe? b) Explain the phenomenon. c) If a hole is made on the upper part of the straw, what happens and why?

Discussion

7758.	What is blind spot of our eye
Answer» What is blind spot of our eye

Discussion

7759.	Why is friction only on earth
Answer» Why is friction only on earth

Discussion

7760.	Find the area of a body which experiences a pressure of 50000 Pascals by a Force of 100N.
Answer» Find the area of a body which experiences a pressure of 50000 Pascals by a Force of 100N.

Discussion

7761.	Waves associated with moving protons, electrons, neutrons, atoms are known as
Answer» Waves associated with moving protons, electrons, neutrons, atoms are known as

Discussion

7762.	What makes a balloon get inflated when air is filled in it?
Answer» What makes a balloon get inflated when air is filled in it?

Discussion

7763.	While playing with prisms, Sushweta arranged three prisms as shown below (2nd prism inverted with respect to the other two) and made sunlight fall on the 1st prism. The colour(s) she would observe in regions A, B and C are respectively:
Answer» While playing with prisms, Sushweta arranged three prisms as shown below ( $2^{n d}$ prism inverted with respect to the other two) and made sunlight fall on the $1^{s t}$ prism. The colour(s) she would observe in regions A, B and C are respectively:

7763.

While playing with prisms, Sushweta arranged three prisms as shown below (2nd prism inverted with respect to the other two) and made sunlight fall on the 1st prism. The colour(s) she would observe in regions A, B and C are respectively:

Answer»

While playing with prisms, Sushweta arranged three prisms as shown below ( $2^{n d}$ prism inverted with respect to the other two) and made sunlight fall on the $1^{s t}$ prism.

The colour(s) she would observe in regions A, B and C are respectively:

Discussion

7764.	State the voltage at which electricity is supplied to our houses.
Answer» State the voltage at which electricity is supplied to our houses.

Discussion

7765.	Which property(ies) seperate(s) solids from fluids?
Answer» Which property(ies) seperate(s) solids from fluids?

Discussion

7766.	Explain the following : (a) Water pipes in colder countries often burst in winter. (b) In winter, water tank (or ocean) starts freezing from the surface and not from the bottom. (c) Fishes survive in ponds even when the atmospheric temperature is below 0∘C. (d) A hollow glass sphere which floats with its entire volume submerged in water at 4∘C, sinks when water is heated above 4∘C. (e) A glass bottle completely filled with water and tightly closed at room temperature, is likely to burst when kept in the freezer of a refrigerator.
Answer» Explain the following : (a) Water pipes in colder countries often burst in winter. (b) In winter, water tank (or ocean) starts freezing from the surface and not from the bottom. (c) Fishes survive in ponds even when the atmospheric temperature is below $0^{\circ} C$ . (d) A hollow glass sphere which floats with its entire volume submerged in water at $4^{\circ} C$ , sinks when water is heated above $4^{\circ} C$ . (e) A glass bottle completely filled with water and tightly closed at room temperature, is likely to burst when kept in the freezer of a refrigerator.

7766.

Explain the following : (a) Water pipes in colder countries often burst in winter. (b) In winter, water tank (or ocean) starts freezing from the surface and not from the bottom. (c) Fishes survive in ponds even when the atmospheric temperature is below 0∘C. (d) A hollow glass sphere which floats with its entire volume submerged in water at 4∘C, sinks when water is heated above 4∘C. (e) A glass bottle completely filled with water and tightly closed at room temperature, is likely to burst when kept in the freezer of a refrigerator.

Answer»

Explain the following :

(a) Water pipes in colder countries often burst in winter.

(b) In winter, water tank (or ocean) starts freezing from the surface and not from the bottom.

(c) Fishes survive in ponds even when the atmospheric temperature is below $0^{\circ} C$ .

(d) A hollow glass sphere which floats with its entire volume submerged in water at $4^{\circ} C$ , sinks when water is heated above $4^{\circ} C$ .

(e) A glass bottle completely filled with water and tightly closed at room temperature, is likely to burst when kept in the freezer of a refrigerator.

Discussion

7767.	One of your friends in your class is wearing a convex lens to correct his vision. He is suffering from which of the following visual defects?
Answer» One of your friends in your class is wearing a convex lens to correct his vision. He is suffering from which of the following visual defects?

Discussion

7768.	The light ray parallel to principal axis will:
Answer» The light ray parallel to principal axis will:

7768.

The light ray parallel to principal axis will:

Answer»

The light ray parallel to principal axis will:

Discussion

7769.	How does pressure exerted by a liquid change with depth?
Answer» How does pressure exerted by a liquid change with depth?

Discussion

7770.	The similarity between the sound waves and light waves is [KCET 1994]
Answer» The similarity between the sound waves and light waves is [KCET 1994]

7770.

The similarity between the sound waves and light waves is [KCET 1994]

Answer»

The similarity between the sound waves and light waves is

[KCET 1994]

Discussion

7771.	Does mercury the planet really has the mercury that was a liquid metal ?
Answer» Does mercury the planet really has the mercury that was a liquid metal ?

Discussion

7772.	Why are metals a good conductor of electricity?
Answer» Why are metals a good conductor of electricity?

Discussion

7773.	While we speak, which part of our body produces sound?
Answer» While we speak, which part of our body produces sound?

Discussion

7774.	Give three uses of Concave lens/mirrors. [3 MARKS]
Answer» Give three uses of Concave lens/mirrors. [3 MARKS]

Discussion

7775.	What is that give the lightning shape?
Answer» What is that give the lightning shape?

Discussion

7776.	Question 12 The process that you saw in Activity 14.7 is used for purification of copper. A thin plate of pure copper and a thick rod of impure copper are used as electrodes. Copper from impure rod is sought to be transferred to the thin copper plate. Which electrode should be attached to the positive terminal of the battery and why?
Answer» Question 12 The process that you saw in Activity 14.7 is used for purification of copper. A thin plate of pure copper and a thick rod of impure copper are used as electrodes. Copper from impure rod is sought to be transferred to the thin copper plate. Which electrode should be attached to the positive terminal of the battery and why?

Discussion

7777.	Question 27 Two rods of the same weight and equal length have different thickness. They are held vertically on the surface of sand as shown in Fig.11.9. Which one of them will sink move? Why?
Answer» Question 27 Two rods of the same weight and equal length have different thickness. They are held vertically on the surface of sand as shown in Fig.11.9. Which one of them will sink move? Why?

Discussion

7778.	Question 7 (b) Identify the part which vibrates to produce sound in the following instrument. Sitar
Answer» Question 7 (b) Identify the part which vibrates to produce sound in the following instrument. Sitar

Discussion

7779.	Question 10 When we press the bulb of a dropper with its nozzle kept in water, air in the dropper is seen to escape in the form of bubbles. Once we release the pressure on the bulb, water gets filled in the dropper. The rise of water in the dropper is due to (a) pressure of water (b) gravity of the earth (c) shape of rubber bulb (d) atmospheric pressure
Answer» Question 10 When we press the bulb of a dropper with its nozzle kept in water, air in the dropper is seen to escape in the form of bubbles. Once we release the pressure on the bulb, water gets filled in the dropper. The rise of water in the dropper is due to (a) pressure of water (b) gravity of the earth (c) shape of rubber bulb (d) atmospheric pressure

Discussion

7780.	Metal block has 2 m length, 1.5 m breadth and thickness of 0.5 m. Calculate the volume of the block?
Answer» Metal block has $2 m$ length, $1.5 m$ breadth and thickness of $0.5 m$ . Calculate the volume of the block?

Discussion

7781.	Why F1 cars have smooth tyres?(30 words)
Answer» Why F1 cars have smooth tyres?(30 words)

Discussion

7782.	A rectangular block of mass 300 kg is placed on the ground. Area of contact is 1.5 m2. Calculate the pressure exerted by the block. (Take accelaration due to gravity =10 m/s2).
Answer» A rectangular block of mass $300 k g$ is placed on the ground. Area of contact is $1.5 m^{2}$ . Calculate the pressure exerted by the block. (Take accelaration due to gravity $= 10 m / s^{2}$ ).

Discussion

7783.	Is friction acting on a surface can be zero?
Answer» Is friction acting on a surface can be zero?

Discussion

7784.	A man wants to move a iron box to the second floor using stairs. He tied a rope to the box and pulls it up a ramp placed over the stairs. The ramp is very smooth (no friction). What forces are acting on the box?
Answer» A man wants to move a iron box to the second floor using stairs. He tied a rope to the box and pulls it up a ramp placed over the stairs. The ramp is very smooth (no friction). What forces are acting on the box?

Discussion

7785.	Why do balloons filled with hydrogen gas move up in the air?
Answer» Why do balloons filled with hydrogen gas move up in the air?

Discussion

7786.	Vijay is going to home from school. He moved 2 km north direction, 3Km in east direction, 5 km in south direction and at last he moved 3 km in west direction. Draw the road map using a proper scale and find the actual distance of his home from school. [3 MARKS]
Answer» Vijay is going to home from school. He moved 2 km north direction, 3Km in east direction, 5 km in south direction and at last he moved 3 km in west direction. Draw the road map using a proper scale and find the actual distance of his home from school. [3 MARKS]

Discussion

7787.	A positively charged glass rod is touched with the disc of an uncharged gold leaf electroscope. What will be your observation?
Answer» A positively charged glass rod is touched with the disc of an uncharged gold leaf electroscope. What will be your observation?

Discussion

7788.	How do we jump so high on trampoline, doesn't any force act on it?
Answer» How do we jump so high on trampoline, doesn't any force act on it?

Discussion

7789.	Why don't we hear sound while sleeping?
Answer» Why don't we hear sound while sleeping?

Discussion

7790.	Why do brake pads of bicycles have to be replaced quite often ?
Answer» Why do brake pads of bicycles have to be replaced quite often ?

Discussion

7791.	What is the cause of Hardware disease in cows?
Answer» What is the cause of Hardware disease in cows?

Discussion

7792.	Which of the following statements regarding lightning conductors is TRUE?
Answer» Which of the following statements regarding lightning conductors is TRUE?

Discussion

7793.	What is Hydrostatic pressure?
Answer» What is Hydrostatic pressure?

Discussion

7794.	Two waves have the frequencies 128 Hz and 256 Hz with same amplitude, then their loudness is in the ratio?
Answer» Two waves have the frequencies 128 Hz and 256 Hz with same amplitude, then their loudness is in the ratio?

Discussion

7795.	Which of the following is an application of a convex mirror?
Answer» Which of the following is an application of a convex mirror?

Discussion

7796.	What length of water column is equivalent to 0.86 m of mercury column? Given: density of mercury is 13.6 times the density of water.
Answer» What length of water column is equivalent to $0.86 m$ of mercury column? Given: density of mercury is $13.6$ times the density of water.

7796.

What length of water column is equivalent to 0.86 m of mercury column? Given: density of mercury is 13.6 times the density of water.

Answer»

What length of water column is equivalent to $0.86 m$ of mercury column?

Given: density of mercury is $13.6$ times the density of water.

Discussion

7797.	What is the most common entry point of virus entry into a host body?
Answer» What is the most common entry point of virus entry into a host body?

Discussion

7798.	A solid weighs 50 N in the air and 45 N when completely immersed in water. Density of water ρ = 1000 kg/m3. Calculate the volume of the solid. (Take acceleration due to gravity = 10 m/s2)
Answer» A solid weighs $50 N$ in the air and $45 N$ when completely immersed in water. Density of water $ρ$ = $1000 k g / m^{3}$ . Calculate the volume of the solid. (Take acceleration due to gravity = $10 m / s^{2}$ )

7798.

A solid weighs 50 N in the air and 45 N when completely immersed in water. Density of water ρ = 1000 kg/m3. Calculate the volume of the solid. (Take acceleration due to gravity = 10 m/s2)

Answer»

A solid weighs $50 N$ in the air and $45 N$ when completely immersed in water. Density of water $ρ$ = $1000 k g / m^{3}$ . Calculate the volume of the solid.

(Take acceleration due to gravity = $10 m / s^{2}$ )

Discussion

7799.	If we start observing earth from 1st January 2001, then how many revolutions around the sun has the earth made till 1st January 2005?
Answer» If we start observing earth from 1st January 2001, then how many revolutions around the sun has the earth made till 1st January 2005?

Discussion

7800.	Why does a fast car slow down if its engine is switched off?
Answer» Why does a fast car slow down if its engine is switched off?

Discussion

Explore topic-wise InterviewSolutions in .

Electrolytes conduct electricity due to the movement of : (a) electrodes (b) atoms (c) electrons (d) ions

What is the difference between electricity and electric charge?

Why does a piece of cork float in water while aa coi sinks in water?

How does pressure decreases by increasing the height?

x = 2+\- 0.1 y = 2+\-0.2 find the x and y based on error

Can you please send me a video on potential energy.

Put a straw in a glass containing some water, such a little amount ofenters through the straw, then put the finger over the other end. Lift the straw up. a) What do you observe? b) Explain the phenomenon. c) If a hole is made on the upper part of the straw, what happens and why?

What is blind spot of our eye

Why is friction only on earth

Find the area of a body which experiences a pressure of 50000 Pascals by a Force of 100N.

Waves associated with moving protons, electrons, neutrons, atoms are known as

What makes a balloon get inflated when air is filled in it?

While playing with prisms, Sushweta arranged three prisms as shown below (2nd prism inverted with respect to the other two) and made sunlight fall on the 1st prism. The colour(s) she would observe in regions A, B and C are respectively:

State the voltage at which electricity is supplied to our houses.

Which property(ies) seperate(s) solids from fluids?

One of your friends in your class is wearing a convex lens to correct his vision. He is suffering from which of the following visual defects?

The light ray parallel to principal axis will:

How does pressure exerted by a liquid change with depth?

The similarity between the sound waves and light waves is [KCET 1994]

Does mercury the planet really has the mercury that was a liquid metal ?

Why are metals a good conductor of electricity?

While we speak, which part of our body produces sound?

Give three uses of Concave lens/mirrors. [3 MARKS]

What is that give the lightning shape?

Question 27 Two rods of the same weight and equal length have different thickness. They are held vertically on the surface of sand as shown in Fig.11.9. Which one of them will sink move? Why?

Question 7 (b) Identify the part which vibrates to produce sound in the following instrument. Sitar

Metal block has 2 m length, 1.5 m breadth and thickness of 0.5 m. Calculate the volume of the block?

Why F1 cars have smooth tyres?(30 words)

A rectangular block of mass 300 kg is placed on the ground. Area of contact is 1.5 m2. Calculate the pressure exerted by the block. (Take accelaration due to gravity =10 m/s2).

Is friction acting on a surface can be zero?

A man wants to move a iron box to the second floor using stairs. He tied a rope to the box and pulls it up a ramp placed over the stairs. The ramp is very smooth (no friction). What forces are acting on the box?

Why do balloons filled with hydrogen gas move up in the air?

Vijay is going to home from school. He moved 2 km north direction, 3Km in east direction, 5 km in south direction and at last he moved 3 km in west direction. Draw the road map using a proper scale and find the actual distance of his home from school. [3 MARKS]

A positively charged glass rod is touched with the disc of an uncharged gold leaf electroscope. What will be your observation?

How do we jump so high on trampoline, doesn't any force act on it?

Why don't we hear sound while sleeping?

Why do brake pads of bicycles have to be replaced quite often ?

What is the cause of Hardware disease in cows?

Which of the following statements regarding lightning conductors is TRUE?

What is Hydrostatic pressure?

Two waves have the frequencies 128 Hz and 256 Hz with same amplitude, then their loudness is in the ratio?

Which of the following is an application of a convex mirror?

What length of water column is equivalent to 0.86 m of mercury column? Given: density of mercury is 13.6 times the density of water.

What is the most common entry point of virus entry into a host body?

A solid weighs 50 N in the air and 45 N when completely immersed in water. Density of water ρ = 1000 kg/m3. Calculate the volume of the solid. (Take acceleration due to gravity = 10 m/s2)

If we start observing earth from 1st January 2001, then how many revolutions around the sun has the earth made till 1st January 2005?

Why does a fast car slow down if its engine is switched off?