Explanation

Explanation

The process of filling the pump casing and suction pipe with liquid to remove air before starting the pump is called priming.

This is a critical step, especially for centrifugal pumps, because they cannot pump air effectively.

Explanation

The SI unit for electromotive force (EMF) is the Volt (symbol: V).

One volt represents one joule of energy provided per coulomb of electric charge. 

Explanation

• Wavelength is the distance between two consecutive points on a wave that are in phase.
• It is typically denoted by the symbol λ (lambda).

Key Points:

• Time period (T) is the time taken by the wave to complete one oscillation.
• Frequency (f) is the number of oscillations per unit time.
• Amplitude (A) is the maximum displacement of the wave from its equilibrium position.

Explanation

The law of inertia is another name for Newton's first law.

'Unless an unbalanced force acts upon it, an object will remain at rest and an item in motion stays in the same direction and speed)'.

Explanation

The frequency of AC (Alternating Current) supply in Pakistan is typically 50 Hertz (Hz).

AC electricity alternates back and forth in a direction 50 times per second

Explanation

In simple harmonic motion (S.H.M), the restoring force is minimum at Mean position. 

The restoring force is directly proportional to the displacement from the mean position.

At the mean position, the displacement is zero, meaning the restoring force is also zero at that point. 

Explanation

Velocity is a vector quantity. 

A vector quantity has both magnitude and direction.

Velocity, which describes the rate of change of position in a specific direction, needs both a magnitude (speed) and a direction to be fully defined. 

Vector Quantities: Velocity, momentum, torque, acceleration.

Scalar Quantities: Work, distance, speed, mass.

Explanation

GPS is an abbreviation of Global positioning system

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The Global Positioning System, originally Navstar GPS, is a satellite-based radio navigation system owned by the United States government and operated by the United States Space Force. 

The GPS (Global Positioning System) is a "constellation" of 31 well-spaced satellites that orbit the Earth

Coverage: Global

Cost: $12 billion; (initial constellation); $750 million per year; (operating cost)

First launch: February 22, 1978; 44 years ago

Orbital height: 20,180 km (12,540 mi)

Regime(s): 6 MEO planes

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Explanation

- Current is the same through all resistors connected in series.  

- Total resistance (R_total) = R₁ + R₂ + R₃ + ... (sum of all resistances).  

- Voltage divides across each resistor according to their resistance (Ohm’s law: V = IR).  

- If one resistor breaks, the entire circuit stops working (open circuit).  

- Series circuits have only one path for current flow.