Question

Today Rohit came to know that in the ancient times people used a device to detect direction. What was that device called?
a) Voltmeter
b) Ammeter
c) Magnetic Compass
d) All of the above
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Answer 1

C) Magnetic Compass

Answer 2

Answer:

I request u to read the whole answer

Explanation:

Voltmeter, instrument that measures voltages of either direct or alternating electric current on a scale usually graduated in volts, millivolts (0.001 volt), or kilovolts (1,000 volts). Many voltmeters are digital, giving readings as numerical displays.

Ammeter, instrument for measuring either direct or alternating electric current, in amperes. An ammeter can measure a wide range of current values because at high values only a small portion of the current is directed through the meter mechanism; a shunt in parallel with the meter carries the major portion.

A Magnetic compass is a navigational instrument for determining direction relative to the Earth's magnetic poles. It consists of a magnetized pointer (usually marked on the North end) free to align itself with Earth's magnetic field. The compass greatly improved the safety and efficiency of travel, especially ocean travel.

so the answer is all of the above

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