Explore topic-wise InterviewSolutions in Current Affairs.

On all alternators, transformers neutral is earthed. Human body is conductor and when touched to the live conductor it completes its shortest root though the body and the body gets electric shock in which its nervous system, the heart, respiratory system may cease to function.  

a. Physical effect. 

b. Chemical effect. 

c. Magnetic effect. 

d. Heating effect. 

e. X-ray effect.  

Temperature co-efficient of the resistance of any substance is, change in its original resistance due to the change in temperature. The temperature co-efficient of resistance of material is the ratio of increase in resistance of 1°C rise in temperature to the original resistance of the material (strictly at 0°C). Formula for the resistance measurement is, 

Rt = R₀ (1+αt) 

Where Rt → Resistance at t°C. 

R₀ → Resistance at 0°C. 

α → Temperature co-efficient. 

t → Temperature rise. 

The voltage rating of the capacitor depends on the distance between the plates of the capacitor. If the voltage exceeds, the electrons across the space between the plates can result in permanent damage to the capacitor. 

Following are the tests to be done after installation of wiring. 

a. Polarity test. 

b. Short circuit test. 

c. Continuity test. 

d. Insulation test between conductors and conductors to the earth. 

e. Earth continuity test. 

Following are the general systems of domestic wiring and industrial wiring. 

a. Cleat system wiring. 

b. Casing and capping system wiring. 

c. Lead sheathed system wiring. 

d. C.T.S, T.R.S, P.V.C sheathed system wiring. 

e. Conduit system wiring. 

Destructive burning of any material is called the fire. Fire is the result of combining fuel, oxygen and heat. If any one among three is separated the fire will come to end. 

Specific resistance of the material is the resistance of a piece of unit length and unit cross-section (unit cube of that material). That is the resistance between the opposite faces of unit cube of the material. 

Or the specific resistance of any material is the resistance offered by the opposite face of that material. 

The unit of specific resistance is Ω/cm³ , Ω/inch³ , Ω/m³ . 

Mainly there are two types of wiring systems. 

a. Tree system. 

b. Distribution system. 

Cell is one unit for converting chemical energy into electrical energy. A cell essentially requires two electrodes, electrolyte and container.

The combination of two or more cells is called the battery.

Kirchhoff’s laws are used in complex network circuits to determine the equivalent total resistance and the current flowing in various conductors of that circuit. 

Mainly there are two laws.

a. Point law or current law. 

b. Mesh law or voltage law. 

Point law or current law.

The point law states that, the algebraic sum of the currents meeting at any point or junction or node of a network is zero. In other words the sum of the currents flowing towards the junction or node or any point of network is equal to the total current flowing away from that junction. 

Mesh law or voltage law.

The mesh law states that, in any closed electrical circuit the algebraic sum of the potential drops is equal to the sum of the impressed emf’s acting in that close circuit. In this the important factor is to determine the emf sign to calculate the total emf. 

The capacity of the battery is measured in ampere-hour. The capacity of the battery depends upon the following factors. 

a. Number and area of the positive plate. 

b. Discharge voltage. A cell should not be discharged below 1.8 V. If it is discharged below 1.8 V it may cause to reduce the capacity. 

c. Discharge rate. Capacity decreases with increase rate of discharge. 

d. Specific gravity of electrolyte. With rapid rate of discharge causes to weaken the electrolyte so the chemical action also weakens and there by the capacity decreases. When the specific gravity increases the capacity of the battery increases. 

e. Quantity of electrolyte. Electrolyte level should be at the top plate level. 

f. The design of separator. The design of the separator should be thin. 

g. Temperature. When the temperature increases the resistance of the battery decreases and the capacity increases. 

Capacitor or condenser is a device to store electrical energy and to release it into the circuit of which the capacitor forms a part. Capacity of a capacitor depends on following factors 

a. Capacity of the capacitor is directly proportional to the area of the plate. 

b. Capacity is inversely proportional to the distance between the plate. That is if the distance is more the capacity decreases or if the distance is less the capacity more. 

c. It depends on the nature of dielectric constant. 

It is that circuit where two or more electrical consuming devices are connected so as to provide as many parallel paths to the flow of current. 

Characteristics of parallel circuit

a. As many parallel paths as there are devices. 

b. Individual devices will get its full efficiency. 

c. Breakage in one circuit will not affect the other circuit. 

d. Current in each device is different according to the resistance of the device. 

e. If the individual resistance increases the total resistance will decrease (1/R = 1/ r₁ + 1/ r₂ +1/ r_n)

f. The reciprocal of total resistance is equal to the sum of the reciprocal of individual parallel resistances (1/R = 1/ r₁ + 1/ r₂ +1/ r_n). 

g. Individual conductance is inversely proportional to the individual resistance. 

h. If two same value resistors are connected in parallel circuit the total resistance is the resistance of one resistor. And the total of parallel circuit resistance will be less than the least resistance in that circuit. 

It is that circuit where two or more electrical consuming devices are connected so as to provide only one path to the flow of current. 

Characteristics of series circuit

a. It has only one path for the flow of current. 

b. If any breakage happens the whole system will be out of that circuit. 

c. It is very difficult to find the fault. 

d. Individual voltage drop depends on individual resistance (V = I r_n). 

e. The total resistance of a series circuit is the sum of the individual resistance. 

f. Addition of the resistance increases total resistance and decreases the current. 

g. Individual device will not get its full efficiency. 

The magnetic field of earth at its surface is 0.25 gauss

or 1/4 gauss

Correct option is (c) 1/4 gauss

Yes, it can have but only in the case of uniform circular motion.

Explanation:

In uniform circular motion through a body moves with a constant speed its direction keeps on changing(along the tangent drawn) as it is a circular path, hence the velocity also keeps on changing(velocity is a vector quantity that means it depends on direction) and therefore we can say that a body moving in a uniform circular motion has uniform speed as well as variable velocity at the same time.

(uniform circular motion means a circular motion with constant speed)

The minimum stress needed to cause the fracture of the material is known as ultimate tensile strength

Material which can be stretched to a large value of strain without breaking is called elastomers 

I surely will.

1. Let’s go for a walk in the evening.

2. No other girl in the class is as clever as Ketaki.

3. I neither have a pen nor a pencil.

4. None of us could answer the question because it was very difficult.

Correct option is A) Let’s

The decision of the Jury is final. Participants cannot protest against their decision.

The Guilty must be punished.

Calculation:

8 years ago, let Anandi’s age = 4a years then Bindiya’s age = 5a years

At present, Bindiya’s age

⇒ 5a + 8 years = 4x

⇒ x = (5a + 8)/4

∴ Chirag’s age = 5x

⇒ 5[(5a + 8)/4]

⇒ (25a + 40)/4

According to the question:

⇒ (25a + 40)/4 – 4a + 8 = 20

⇒ 25a + 40 – 16a – 32 = 80

⇒ 9a + 8 = 80

⇒ 9a = 72

⇒ a = 8

At present Anandi’s, age = 4a + 8 = 40 years

Bindiya’s age = 5a + 8 = 48 years

Chirag’s age = 5/4 × 48

⇒ 60 years

∴ Required Sum = 40 + 48 + 60

⇒ 148 years

If they had contacted me I would have helped them

Correct option: a) Result Orientation

Correct option: a) Active listening

There are eight players in Gymnastics, out of the six players participate in competition and two are substitutes.

My father gave me a lot of advice.

If any contestant in Gymnastics falls ill, officials have to wait for him for thirty minutes.

For each gymnastic exercise, there are points from 0 to 10, and each point is sub-divided into 10 parts. If the panel of the judges is of five members, the minimum and maximum points are not considered, and an average of mid three points is taken. If the panel is composed of three judges, the marks of three are taken for average.

Correct option is D) in

Correct option: c) Both a and b

Correct option is C) zit

Correct answer is

d. Keep work area uncluttered

A complex sentence is a sentence that combines one independent clause with at least one dependent clause.

He took up gymnastics when he was seven years old.

If I were a bird, I would fly.

Correct option is A) zero