Explore topic-wise InterviewSolutions in Current Affairs.

Following is the position of the players in a volleyball game:
4 3 2
5 6 1

There are 12 players in a volleyball game out of which six are the players and six are the substitutes.

The weight of air in a volleyball should be 0.48 kg to 0.52 Kg.

The length of a volleyball net is 9 metre and its breadth is one metre.

Six players can be substituted. All the six players can be substituted.

The height of a volleyball net for boys is 2.43 metres and for girls it is 2.24 metres.

A volleyball court is 18 metres long and 9 metres wide.

Correct option is D) themselves

Answer:  T(L) and M(L) will fall, T(M) will remain same and M(M) will increase

Correct option (1)

Explanation:

V = I R Taking log both sides

log V = log I + log R

log I = log V - log R

This equation represents a straight line which cuts log V axis and slope is +ve. 

Electic energy (W) = V²/R t 

V²  =  WRt = 100 x 4 x 1 = 400

V = 20 volt

The qualities of an ideal source of energy are followings :-

(1)  It is easily accessible.

(2)  It is easy to store and transport.

(3)  It is economical.

(4)  It is capable of giving an adequate amount of useful energy.

(5)  It does a huge amount of work per unit mass. (6) It produces less amount of smoke.

Oil,coal, nuclear or natural gas are the energy sources that consider to be exhaustible.

The pattern of the magnetic field lines around a current carrying solenoid and a bar magnet are similar. One end of solenoid behaves as a magnetic north pole, while the other behave as the south pole that’s why solenoid behaves like a magnet.

The force experienced by a current carrying conductor placed in a magnetic field is largest when the direction of current is at right angles to the direction of magnetic field.  

Answer is Turns blue

a. i. MgSO₄ + BaCl₂ → BaSO₄ + MgCl₂ 

ii. K₂CO₃ + BaCl₂ → BaCO₃ + 2KCl

iii. KCl + AgNO₃ → AgCl + KNO₃

b. i. BaSO₄ 

ii. BaCO₃ 

iii. AgCl

a. H₂SO₄ 

b. Barium sulphate (BaSO₄) 

c. C + 2H₂SO₄ → CO₂ + 2H₂O + SO₂

a. White precipitate is formed 

b. Ba₂CO₃

c. Clear solution 

d. White precipitate is formed 

e. BaSO₄

f. No change 

g. No substance is formed

Reactivity of copper is less than that of iron.

Silver reacts with sulphur in the air to form a coating of silver sulphide.

(i) In the solid state ionic compounds do not conduct electricity because movement of ions in the solid is not possible due to their rigid structure.

(ii) In solid state, they are hard because of the strong force of attraction between the positive and negative ions.

(iii) In molten state, electrostatic forces of attraction between the oppositely charged ions are overcome due to the heat.

(iv) thus the ions move freely and conduct electricity.

1. No two field lines are found to cross each other.

2. The density of the magnetic field lines are more in their poles.

3. The magnetic field lines emerge from north pole and merge at south pole.

4. Inside the magnet, the direction of field lines is from its south pole to its north pole.

5. Thus the magnetic field lines are closed curves.

(i) Overloading can occur when the live wire and the neutral wire come into direct contact.

(ii) This occurs when the insulation of wires is damaged or there is a fault in the appliance.

(iii) In such a situation, the current in the circuit abruptly increases.

(iv) The heating that takes place in the fuse melts it to break the electric circuit and prevents the electric appliances from possible damage.

(i) Element B and element D are in same period because their atoms have two shells.

(ii) Element A and element E are in the same, group because their outermost shell has one electron.

(i) Improper nuclear waste storage and disposal result in environmental contamination.

(ii) There is a risk of accidental leakage of nuclear radiation.

(a) 218 kcal is released 

For the conversion of water→ vapour, the entropy 

change is given by Δ_vap S = Δ_vapH/T_b

Here, Δ_vap H = 2.257 kJ/g = 2.257 × 18 kJ/mol 

= 40.626 kJ/mol, T_b = 373 K 

∴ Δ_vap S = 40.625KJ mol^-1/373 = 0.1089 KJ K^-1

mol^–1 = 108.9 J K^–1 mol^–1 .

(i) They have no moving parts.

(ii) Require little maintenance and work quite satisfactorily without the use of any focusing device.

(iii) They can be set up in remote and inaccessible hamlets also.

(iv) Very sparsely inhabited areas in which laying of a power transmission line may be expensive and not commercially viable.

(i) Solar water heater

(ii) Solar cooker

(i) Methane/CH₄

(ii) Leaves no residue like ash

(iii) It bums without smoke.

(iv) Its heating capacity is high

(v) Bio-gas is also used for lighting.

The ability of a lens to converge or diverge the ray of light after refraction is called power (p) of the lens. It is defined as the reciprocal of the focal length.
i.e, P = \(\frac{1}{f}\)

SI unit of power of a lens is diopter. A lens of focal length 100 cm has a power of 1 dioptre i,e., 1 dioptre = 1 m

If the power of a lens is 2 D then the type of lens is concave lens.
The size of the image in this lens is highly diminished point sized.

In the formation of ionic compounds, positive ions and negative ions precipitate. These are closely packed and the ionic compounds exist as crystalline solids. They have strong inter ionic process of attraction and have high melting and boiling points.

i) 3Fe + 4H₂O → FC₂O₄ + H₂

ii) Ca + 2H₂O → Ca(OH)₂ + H₂

2K + 2H₂O → 2KOH + H₂