PYQsNEET

A long wire carrying a steady current is bent into a circular loop of one turn. The magnetic field at the centre of the loop is B. It is then bent into a circular coil of n turns. The magnetic field at the centre of this coil of n turns will be: 1. nB 2. n2B 3. 2nB 4. 2n2B

Ruhul Amin Alig

PYQsNEET

If an agricultural field is liberally, irrigated for a prolonged period of time, it is likely to face a problem of : 1. Metal toxicity 2. Alkalinity 3. Acidity 4. Salinity [NEET 2019 ]

Ruhul Amin Alig

PYQsNEET

Air (Prevention and Control of Pollution) Act was amended in 1987 to include among pollutants 1. Vehicular exhaust 2. Allergy causing pollen 3. Noise 4. Particulates of size 2.5 micrometer or below [NEET 2020 ]

Ruhul Amin Alig

PYQsNEET

The factor that leads to Founder effect in a population is: 1. Mutation 2. Genetic drift 3. Natural selection 4. Genetic recombination

Ruhul Amin Alig

PYQsNEET

After about how many years of the formation of the earth, life appeared on this planet? 1. 500 billion years 2. 50 million years 3. 500 million years 4. 50 billion years

Ruhul Amin Alig

PYQsNEET

Embryological support for evolution was proposed by 1. Ernst Heckel 2. Karl Ernst von Baer 3. Charles Darwin 4. Alfred Wallace

Ruhul Amin Alig

PYQsNEET

From his experiments, S.L. Miller produced amino acids by mixing the following in a closed flask : 1. CH 3 , H 2 , NH 4 and water vapour at 800 ° C CH3, H2, NH4 and water vapour at 800°C 2. CH 4 , H 2 , NH 3 and water vapour at 600 ° C CH4, H2, NH3 and water vapour at 600°C 3. CH 3 , H 2 , NH 3 and water vapour at 600 ° C CH3, H2, NH3 and water vapour at 600°C 4. CH 4 , H 2 , NH 3 and water vapour at 800 ° C CH4, H2, NH3 and water vapour at 800°C

Ruhul Amin Alig