If a charge q is placed at the center of the line joining two equal charges Q such that the system is in equilibrium then the value of q is :
1 mole of a gas with is mixed with 1 mole of a gas with , then the value of for the resulting mixture is :
Speeds of two identical cars are u and 4 u at a specific instant. The ratio of the respective distances at which the two cars are stopped from that instant is :
Explain the following terms with example (a) Co-dominance (b) Incomplete dominance Answer (a) Co-dominance
A child has blood group O. If the father has blood group A and mother blood group B, work out the genotypes of the parents and the possible genotypes of the other offsprings.
Two heterozygous parents are crossed. If the two loci are linked what would be the distribution of phenotypic features in F1 generation for a dihybrid cross?
When a cross in made between tall plants with yellow seeds (TtYy) and tall plant with green seed (TtYy), what proportions of phenotype in the offspring could be expected to be (a) Tall and green. (b) Dwarf and green.
When a cross in made between tall plants with yellow seeds (TtYy) and tall plant with
green seed (TtYy), what proportions of phenotype in the offspring could be expected to be
(a) Tall and green.
(b) Dwarf and green.
Using a Punnett square, work out the distribution of phenotypic features in the first filial generation after a cross between a homozygous female and a heterozygous male for a single locus.
Two forces are such that the sum of their magnitudes is 18 N and their resultant which has magnitude 12 N, is perpendicular to the smaller force. Then the magnitudes of the forces are :
When forces F1, F2, F3 are acting on a particle of mass m such that F2 and F2 are mutually perpendicular, then the particle remains stationary. If the force F1 is now removed, then the acceleration of the particle is:
In a transformer, number of turns in the primary are 140 and that in the secondary are 280. If current in primary is 4 A, then that in the secondary is :
The time period of a charged particle undergoing a circular motion in a uniform magnetic field is independent of its
At what temperature is the rms velocity of a hydrogen molecule equal to that of an oxygen molecule at 47°C ?
The mass of a product liberated on anode in an electrochemical cell depends on? Note: t is the time period for which the current is passed.
A lift is moving down with acceleration a. A man in the lift drops a ball inside the lift. The acceleration of the ball as observed by the man in the lift and a man standing stationary on the ground are respectively :
A child swinging on a swing in sitting position, stands up, then what will be the time period of the swing?
Two identical particles move towards each other with velocity 2v and v respectively. The velocity of centre of mass is :
Wavelength of light used in an optical instrument are then ratio of their respective resolving powers (corresponding to ) is:
A charged particle q is placed at the centre O of cube of length L (ABCDEPGH). Another same .charge q is placed at a distance L from O. Then the electric flux through ABCD is :
If a spring has time period T, and is cut into n equal parts, then the time period of each part will be :