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Start learning 50% faster. Sign in nowIn semiconductors, a hole is the absence of an electron in the valence band and acts as a positive charge carrier . When an electron gets excited to the conduction band, it leaves behind a hole. While both electrons and holes contribute to conduction, they move differently and do not have the same mobility . Electrons generally have higher mobility than holes due to their lower effective mass and freer movement in the conduction band.
Akshay, Vishal and Dipak purchased 2, 20 and 50 notebooks for a total of Rs 16, Rs 140 and Rs 400 respectively from a stationery shop. In his transactio...
A car manufacturing company manufactures 4,650 cars, 7,500 cars and 9,860 cars of A, B and C type respectively. If 24% of A type, 39% of B typ...
Niharika saves 25% of her salary in National Savings Certificate and spend 80% of the remaining amount on household items. If the cash in hand is Rs....
The population of a town grows from 1,25,000 to 1,56,250 over a period of two years. Calculate the average annual percentage increase in the population.
A man invested all his current month income in starting of a new business in which he spends 25% in advertisement 20% of remaining in furniture 10% of r...
Rajesh spent 45% of his monthly income on food and 55% of the remaining of study. If total monthly savings (after spending on food and study) of Rajesh ...
A school's enrollment of students increased by 10% in 2015, another 20% in 2016, and then decreased by 30% in 2017. If the percentage of students receiv...
A housewife saved Rs. 2.50 in buying an item on sale. If she spent Rs. 25 for the item, approximately how much percent she saved in the transacti...
