Explanation

A device that is used to convert AC voltage into DC voltage is called A Rectifier.

Inverters and rectifiers are electronic circuits that can change the type of electric current.

a rectifier converts AC to DC.

Explanation

To find the self-inductance of a coil, we can use the formula:

L = (ΔΦ / ΔI)

Where:

L is the self-inductance in Henry (H),

ΔΦ is the change in magnetic flux in Weber (Wb),

and ΔI is the change in current in Ampere (A).

In this case, the current changes from 5A to 0A (nil) in 5 seconds. (ΔI) is therefore 5A - 0A = 5A.

To find the change in (ΔΦ), we can use Faraday's law of electromagnetic induction

ΔΦ = L * ΔI

Since the current changes from 5A to 0A in 5 seconds, the rate of  (ΔI) is 5A / 5s = 1A/s.

Substituting the values into the equation:

ΔΦ = L * ΔI

500 V = L * 1 A/s

Since the (V) is equal to  (L) and  (ΔI), we can rewrite the equation as:

L = 500 V / 1 A/s

Simplifying the equation gives us:

L = 500 H

Therefore, the self-inductance of the coil is 500 Henry (H).

Explanation

 Convert the speeds of the trains from km/h to m/s

1 km/h = 1000 m/3600 s

Speed of the first train = 60 km/h = (60,000 m/3600 s) m/s = 16.67 m/s.

Speed of the second train = 45 km/h = (45,000 m/3600 s) m/s = 12.50 m/s.

Relative speed = Speed of the first train - Speed of the second train = 16.67 m/s - 12.50 m/s = 4.17 m/s.

Distance = Length of the second train = 500 meters.

Using the formula:

Distance = Speed × Time

Time = Distance / Relative speed = 500 meters / 4.17 m/s = 120.05 seconds.

To convert the time from seconds to minutes, we divide by 60:

Time in minutes = 120.05 seconds / 60 = 2 minutes (approximately).

Therefore, the first train will cross the second train after approximately 2 minutes.

Explanation

To find the current flowing through the conductor, you can use Ohm's Law, which states:

$\text{Voltage (V)}=\text{Current (I)}\times \text{Resistance (R)}$

Given that the power (P) of the conductor is $100\text{W}$, and the voltage (V) is $250\text{V}$, you can use the formula:

Explanation

ICAO is a UN agency that deals with international air navigation

ICAO stands for International Civil Aviation Organization

It was created in 1944 by the Chicago Convention

It was started function (founded) on 14th July 1947

Its headquarters is in Montreal, Canada

Official language (06):

1. Arabic
2. Chinese
3. English
4. French
5. Russia
6. Spanish

Explanation

To find the value of y in the equation 3x+y=2, we can substitute the given value of x into the equation and solve for y.

1. Given value of x: x = 4.

2. Substitute the value of x into the equation: 3(4) + y = 2.

3. Simplify the equation: 12 + y = 2.

4. Solve for y by isolating the variable: y = 2 - 12.

5. Simplify the right side of the equation: y = -10.

Therefore, when the value of x is 4 in the equation 3x+y=2, the value of y is -10.

Explanation

The top priority of IATA is safety.

IATA stands for International Air Transport Association

It is an international trade association

It is the prime vehicle for inter-airline cooperation for the benefit of the world's consumers.

It was founded in Havana, Cuba, on 19 April 1945.

 It is headquartered in Montreal, Canada

Membership 317 airlines (2023) from over 120 countries and regions

Explanation

1. Count the number of desired outcomes:

- There are 11 white balls.

2. Count the total number of possible outcomes:

- There are 5 blue balls.

- There are 6 red balls.

- There are 11 white balls.

- Add these numbers together: 5 + 6 + 11 = 22 possible outcomes.

3. Calculate the probability by dividing the number of desired outcomes by the total number of possible outcomes:

- Probability = Number of desired outcomes / Total number of possible outcomes

- Probability = 11 / 22 = 0.5

Therefore, the probability of pulling out a white ball from the bag is 0.5, or 50%.

Explanation

Pakistan Civil Aviation Authority (CAA) is a public sector

It was Formed on 7 December 1982

They work under the Federal Government of Pakistan 

PCAA's head office is situated at Jinnah International Airport in Karachi.

PCAA is a member state of the International Civil Aviation Organization

44 civilian airports in Pakistan are owned 

Explanation

An angle whose measure is greater than 90°, but less than 180° is called an obtuse angle