First Wristwatch

2. WHEN WAS THE FIRST WRISTWATCH MADE?

The exact time the first wristwatch appeared in not known. :(  But one man patented his wristwatch in the year?

Options:

(A). 1924

(B). 1936

(C). 1947

(D). 1836

Answer:

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First Wristwatch

The fist self-winding wrist-satch was invented by John Harwood, an Englishman who patented it in 1924. Today the largest watchmaking industry in the world is concentrated in the Jura Mountains and the valley of the Aar in Switzerland.

The exact time the first wristwatch appeared is not known. But soon after the beginning of the 20th century women small pocket watches began to be fitted into specially made leather or gold adaptors to be worn on the wrist. They were immediately successful, and their popularity rapidly in creased in the First World War because they could be consulted without undoing a coat or uniform jacket.

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Telephone Founder

9. Who is the inventor of Telephone?

Options:

(A). Alexander Graham Bell

(B). Thomas A. Edison

(C) A. Watson, Bell's

(D) Alfred Nobel

Answer:

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TELEPHONE INVENTED

13. WHEN WAS THE TELEPHONE INVENTED?

Options:

(A) Feb 13, 1877

(B) March, 1876 

(C) Aug 31, 1879

(D) Dec 4, 1884

Answer:

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First Telephone Invented

13. WHEN WAS THE TELEPHONE INVENTED?

Answer:

(B) March 10, 1876

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Telephone Invented

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Alexander Graham Bell inventor of Telephone was born in 1847 and died in 1922. 

In 1874 He said,
                " If I could make a current of electricity vary in intensity precisely as the air varies in density during the production of sound, I should be able to transmit speech telegraphically". This is the principle of the telephone.

Alexander Graham Bell invented and patented in 1876 the first telephone that was of any real practical use.

On March 10, 1876, the first historic message was telephoned to Thomas A. Watson, Bell's assistant, who was in another room: " Mr Watson, come here; I want you."
Bell's first machine gave electrical currents too feeble to be of much use for the general public.

In 1877 the American scientist Thomas A. Edison (1847-1931) invented the variable-contact carbon tranmitter, which greatly increased the power of the signals.

The telephone was immediately popular in the United States, but Bell found little interest in Britain when he visited the country in 1878. Then Queen Victoria asked for a pair of telephones and the royal interest resulted in a London telephone exchange being formed in 1879 with eight subscribers.

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