What is the order of magnitude of electric resistance of the human body (dry)?
Answer: B. 10 4 ohm
Assertion (A): In our houses, the current in AC. electricity line changes direction 60 times per second.
Reason (R): The frequency of alternating voltage supplied is 50 Hz.
Codes:
Answer: D. A is false but R is true
Fluorescent tubes are fitted with a choke. The choke coils
Answer: C. reduce cur rent in the circuit
Assertion (A): The temperature of a metal wire rises when an electric current is passed through it.
Reason (R): Collision of metal atoms with each other releases heat energy.
Answer: C. A is true but R is false
A fuse is used in mains electric supply as a safety device. Which one of the following statements about the fuse is correct?
Answer: C. It must have a low melting point
Domestic electrical wiring is basically a:
Answer: B. parallel connection