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Electrical Injuries and Ohm's Law Basics

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Electrical Injuries and Ohm's Law Basics

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Questions and Answers

What is a common feature of electrical injuries described in the text?

Hair discoloration

Nail growth acceleration

Skin softening

Gross charring (correct)

Which histological feature is associated with electrical injuries?

Fat necrosis

Bone marrow hyperplasia

Mini arcing histology (correct)

Smooth muscle hypertrophy

What is a known cause of death in electrocution cases?

Cardiac dysrhythmia (correct)

Hepatic encephalopathy

Lung contusion

Renal tubular acidosis

What is a common feature of keraunopathology (lightning) injuries?

Always accidental Signup and view all the answers

What is the unit used to measure electricity in terms of electromotive force?

Volt Signup and view all the answers

What is a recommended step in the medico-legal investigation of electrical injuries?

Scene visit Signup and view all the answers

What is the effect of a 100 mA current on the body?

Ventricular fibrillation Signup and view all the answers

Which type of burn is characterized by peeled or blistered skin, charring, and deep scorching in electrical injuries?

Electrical burn Signup and view all the answers

What determines the severity of tissue damage in an electrical injury?

Current flow and voltage Signup and view all the answers

Which law states that Amperes are equal to Volts divided by Ohms?

Ohm's Law Signup and view all the answers

Which type of injury is commonly associated with grounding in electrical accidents?

Lesion in feet Signup and view all the answers

What happens during Joule burn in an electrical injury?

Splitting of skin layers due to steam production Signup and view all the answers

What do keraunographic markings on the ground indicate?

Damage to nearby trees Signup and view all the answers

Which post mortem feature is characteristic of lightning strike victims?

Tympanic membrane rupture Signup and view all the answers

What histological finding is typically observed in lightning strike injuries?

Only extravasation of blood in upper cutaneous fat Signup and view all the answers

What happens to erythematous marks in survivors within 12 hours?

They disappear Signup and view all the answers

What is a common cardiac injury seen in lightning strike victims?