It is true that electronics developed from the study of electricity. Early ideas about the way electric current could flow through conductors and through a vacuum led to the development of useful radio systems and telephones. It was possible to send messages with what was, by today's standards, incredibly simple and crude equipment. The Second World War provided an urgent requirement for more 2 sophisticated communication and other electronic systems. The invention of radar required a big step forward in theory and even bigger step forward in engineering. The study of electronics gradually became an important study in its own right, and the radio engineer became a specialized technician The post-war development of television led to one of the most massive social changes that have ever taken place: many households became the owners of televisions, as well as radios and record players. In some branches of industry, electronic systems were regarded as useful, but electronic systems not directly concerned with wireless or television were still unusual. Only in the early 1960s did electronics technology really come of age', thanks to the work of three scientists working in the Bell Laboratories in the USA: Bardeen, Brattain, and Shockley. In 1957 they assembled the first working transistor
The first working transistor was developed
Created: 4 years ago |
Updated: 11 months ago
Updated: 11 months ago
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in 1957
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during World War II
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before World War II
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in 1960
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ক
the forest did not harden it
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the travelers wearing boots
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the shoes had nails on their sole and heel
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we enjoyed walking in the woods
Created: 1 month ago |
Updated: 1 month ago
Updated: 1 month ago
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it was good walking with nails in the boots
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it was sheer joy to walk in the forest
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the path was unaffected by the forest
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ঘ
the walks were instigating
Created: 1 month ago |
Updated: 1 month ago
Updated: 1 month ago
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ক
we had nailed boots on
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it was good walking on the road
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গ
the walk was refreshing
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the nails bit on the frozen roads
Created: 1 month ago |
Updated: 1 month ago
Updated: 1 month ago
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Suffering over the hills
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To avoid bad weather
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গ
Cannot fly afterwards
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ঘ
Make them confused
Created: 1 month ago |
Updated: 1 month ago
Updated: 1 month ago
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In autumn
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During autumn and early winter
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গ
During the spring and early summer
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During winter
Created: 1 month ago |
Updated: 1 month ago
Updated: 1 month ago
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To get warmer
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খ
To get colder
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গ
To migrate
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ঘ
To get light
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প্রশ্ন এডিট করা যাবে
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ঠিকানা যুক্ত করা যাবে
Logo, Motto যুক্ত হবে
অটো প্রতিষ্ঠানের নাম
অটো সময়, পূর্ণমান
প্রশ্ন এডিট করা যাবে
জলছাপ দেয়া যাবে
ঠিকানা যুক্ত করা যাবে
Logo, Motto যুক্ত হবে
অটো প্রতিষ্ঠানের নাম
অটো সময়, পূর্ণমান
অটো নির্দেশনা (এডিটযোগ্য)
অটো বিষয় ও অধ্যায়
OMR সংযুক্ত করা যাবে
ফন্ট, কলাম, ডিভাইডার
প্রশ্ন/অপশন স্টাইল পরিবর্তন
সেট কোড, বিষয় কোড
অটো নির্দেশনা (এডিটযোগ্য)
অটো বিষয় ও অধ্যায়
OMR সংযুক্ত করা যাবে
ফন্ট, কলাম, ডিভাইডার
প্রশ্ন/অপশন স্টাইল পরিবর্তন
সেট কোড, বিষয় কোড
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