Explanation

Inguinal hernias occur when abdominal contents protrude through the inguinal canal.

They are most common in males due to the passage of the spermatic cord.

They account for the majority of hernia cases in men and may present as a groin swelling.

Explanation

Dumping syndrome occurs when stomach contents move too quickly into the small intestine, commonly after gastrectomy.

It leads to symptoms like nausea, diarrhea, abdominal cramps, and rapid heartbeat.

Explanation

Portocaval anastomosis occurs where the portal and systemic venous systems communicate, such as in the anal canal, esophagus, and around the umbilicus.

In the anal canal, it involves the superior rectal vein (portal) and middle & inferior rectal veins (systemic), which can lead to hemorrhoids in portal hypertension.

Explanation

The first step in treating chemical burns is to immediately wash the affected area with plenty of water to remove the chemical.

This helps prevent further tissue damage and reduces the severity of the burn.

Explanation

Ureteric obstruction is most commonly caused by kidney stones (calculi) blocking the ureter.

This can lead to pain, hydronephrosis, and impaired urine flow.

Explanation

Gas viscosity rises with temperature because gas molecules move faster and collide more frequently.

This behavior is opposite to liquids, where viscosity usually decreases with temperature.

Explanation

Hertz (Hz) is the SI unit of frequency, representing one complete cycle per second.

Frequency measures how often a repeating event occurs in one second.

Explanation

- Resistivity (ρ) is a measure of how strongly a material opposes the flow of electric current.

- The reciprocal of resistivity is called conductivity (σ).

Mathematically:  

σ = 1 / ρ

- Conductivity indicates how easily a material allows the flow of electric current.

- The other options:  

  - Impedance relates to resistance and reactance in AC circuits.  

  - Admittance is the reciprocal of impedance.  

  - Resistance is the opposition to current flow but depends on dimensions, unlike resistivity.

Explanation

Percentage elongation measures how much a material stretches before breaking under tensile load.

Higher elongation indicates greater ability to deform plastically without fracture.

Percentage elongation is a direct measure of ductility.

Explanation

Steel is more elastic than rubber because the ratio of stress to strain is more for steel.

This indicates that steel deforms less under the same amount of stress compared to rubber, making it more elastic.