The total current supplied to the circuit by the battery is

Anonymous User Physics Current Electricity 08 Apr, 2020 61 views

The length of a given cylindrical wire is increased by 100%. Due to the consequent decrease in diameter, what will be the change in the resistance of the wire?

Anonymous User Physics Current Electricity 08 Apr, 2020 61 views

A 3 volt battery with negligible internal resistance is connected in a circuit as shown in the figure. The current I, in the circuit will be

Anonymous User Physics Current Electricity 08 Apr, 2020 60 views

The length of a wire of a potentiometer is 100 cm, and the e.m.f. of its standard cell is E volt. It is employed to measure the e.m.f. of a battery whose internal resistance is  If the balance point is obtained at l = 30 cm from the positive end, the e.m.f. of the battery is

Anonymous User Physics Current Electricity 08 Apr, 2020 60 views

Find p and q such that px2 +5x+2=0 and 3x2 +10x+q=0. have both roots in common?

Anonymous User Maths Quadratic Equation 08 Apr, 2020 165 views

If equation  has  roots equal in magnitude & opposite in sign, then the value of k is?

Anonymous User Maths Quadratic Equation 07 Apr, 2020 103 views

Under the same conditions how many ml of 1M KOH and 0.5M H2SO4 solutions respectively when mixed for a total volume of 100 ml produce the highest rise in temperature

Anonymous User Chemistry 07 Apr, 2020 107 views

For the reaction are positive. The most favourable conditions for the reaction is

Anonymous User Chemistry 07 Apr, 2020 55 views

The ratio of closed packed atoms to tetrahedral holes in cubic close packing is

Anonymous User Chemistry 07 Apr, 2020 71 views

In a crystal some ions are missing from normal sites. This is an example of

Anonymous User Chemistry 07 Apr, 2020 108 views

The radius of Ag+ ion is 126 pm while that of I– ion is 216 pm. The coordination number of Ag+ in AgI is

Anonymous User Chemistry 07 Apr, 2020 132 views

The melting point of RbBr is 628°C, while that of NaF is 988°C. The principal reason that melting point of NaF is much higher than that of RbBr is that

Anonymous User Chemistry 07 Apr, 2020 90 views

The ionisation energy of solid NaCl is 180 kcal/mol. The dissolution of the solid in water is endothermic to the extent of 1 kcal per mol. If the solvation energies of Na+ and Cl– ions are in the ratio 6:5, what is the enthalpy of hydration of sodium ion

Anonymous User Chemistry 07 Apr, 2020 68 views

At 88°C benzene has a vapour pressure of 900 torr and toluene has a vapour pressure of 360 torr. What is the mole fraction of benzene in mixture with toluene that will boil at 88°C at 1 atm pressure assuming ideal solution.

Anonymous User Chemistry 07 Apr, 2020 246 views

When mercuric iodide is added to the aqueous solution of KI then the

Anonymous User Chemistry 07 Apr, 2020 65 views

Salts of A (atomic weight 7), B (atomic weight = 27) and C (atomic weight 48) were electrolysed under identical conditions using same quantity of electricity. It was found that when 2.1g of A was deposited, weights of B and C deposited were 2.7g and 7.2g. The valencies of A, B and C are respectively.

Anonymous User Chemistry 07 Apr, 2020 100 views

On moving a charge of 20 coulomb by 2 cm, 2 J of work is done, then what will be the potential difference between the points?

Anonymous User Physics Electrostatic 07 Apr, 2020 75 views

A charged ball B hangs from a silk thread S, which makes an  with a large charged conducting sheet P, as shown in the figure. The surface charge density  of the sheet is proportional to

Anonymous User Physics Electrostatic 07 Apr, 2020 101 views

Four charges equal to –Q are placed at the four corners of a square and a charge q is at its centre. What is the value of q If the system is in equilibrium?

Anonymous User Physics Electrostatic 07 Apr, 2020 64 views

A charged particle q is shot towards another charged particle Q which is fixed, with a speed v. It approaches Q upto a closest distance r and then returns. If q were given a speed 2v, what will b the closest distances of approach?

Anonymous User Physics Electrostatic 07 Apr, 2020 65 views

Two spherical conductors B and C having equal radii and carrying equal charges in them repel each other with a force F when kept apart at some distance. A third spherical conductor having the same radius as that of B but uncharged is brought in contact with B, then brought in contact with and finally removed away from both. The new force of repulsion between B and C is

Anonymous User Physics Electrostatic 07 Apr, 2020 96 views

Three charges –q1, +q2 and –q3 are placed as shown in the figure. The x-­component of the force on –q1 is proportional to

Anonymous User Physics Electrostatic 07 Apr, 2020 69 views

What is the work done in placing a charge of 8 × 10-18 coulomb on a condenser of capacity 100 micro-­farad?

Anonymous User Physics Electrostatic 07 Apr, 2020 74 views

A thin spherical conducting shell of radius R has a charge q. Another charge Q is placed at the centre of the shell. The electrostatic potential at a point P at a distance R/2 from the centre of the shell is

Anonymous User Physics Electrostatic 07 Apr, 2020 71 views

A sheet of aluminum foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

Anonymous User Physics Electrostatic 07 Apr, 2020 64 views

If Ihe electric flux entering and leaving an enclosed surface respectively is  the electric charge inside the surface will be

Anonymous User Physics Electrostatic 07 Apr, 2020 65 views

What is capacitance (in F) of a spherical conductor with radius 1 meter?

Anonymous User Physics Electrostatic 07 Apr, 2020 63 views

If a charge q is placed at the centre of the line joining two equal charges Q such that the system is in equilibrium then what will be the value of q?

Anonymous User Physics Electrostatic 07 Apr, 2020 66 views

If there are n capacitors in parallel connected to volt source, then the energy stored is equal to

Anonymous User Physics Electrostatic 07 Apr, 2020 63 views

A charged particle q is placed at the centre O of cube of length L (ABCDEFGH). Another same charge q is placed at a distance from O. Then the electric flux through ABCD is

Anonymous User Physics Electrostatic 07 Apr, 2020 73 views

The equations 5x2 + 12x + 13 = 0 and ax2 + bx + c = 0 (a,b,c  belongs R) have a common root, where a, b, c are the sides of the ABC. Then find C .

Anonymous User Maths Quadratic Equation 06 Apr, 2020 117 views

The value of the expression  will be positive for all real x if

Anonymous User Maths Quadratic Equation 06 Apr, 2020 606 views

The minimum value of the expression 4x2 + 2x + 1 is ?

Anonymous User Maths Quadratic Equation 06 Apr, 2020 440 views

Find all possible values of a for which exactly one root of x2 –(a+1)x + 2a = 0 lies in interval (0,3) ?

Anonymous User Maths Quadratic Equation 06 Apr, 2020 94 views

Find value of k for which one root of equation x2 – (k+1)x + k2 + k – 8 = 0 exceeds 2 & other is less than 2.

Anonymous User Maths Quadratic Equation 06 Apr, 2020 71 views

If q, r, s are positive, show that the equation ƒ (x) = x4 + qx2 + rx – s = 0 has one positive, one negative and two imaginary roots.

Anonymous User Maths Quadratic Equation 06 Apr, 2020 170 views

What kind of assisted reproductive technology should be prescribed if the male partner of a couple has very low sperm count?

Anonymous User Biology Reproductive Health 05 Apr, 2020 66 views

What is the function of combined contraceptive pills?

Anonymous User Biology Reproductive Health 05 Apr, 2020 61 views

What is the permanent methods of birth control in male and female?

Anonymous User Biology Reproductive Health 05 Apr, 2020 66 views

Explain the steps in seed formation after a double fertilization in angiosperm.

Anonymous User Biology Reproductive Health 05 Apr, 2020 70 views

Why the event of fertilisation in angiosperms is called double fertilisation?

Anonymous User Biology Reproductive Health 05 Apr, 2020 63 views

Describe the sequence and process of oogenesis in schematic representation in humen female

Anonymous User Biology Reproductive Health 05 Apr, 2020 65 views

When fetal ejection reflex pccurs> Explain the roles of diiferent hormones during parturition.

Anonymous User Biology Reproductive Health 05 Apr, 2020 76 views

How does the placenta develop in human female?

Anonymous User Biology Reproductive Health 05 Apr, 2020 77 views

Pollen grains are used as food supplements. explain with reason.

Anonymous User Biology Reproductive Health 05 Apr, 2020 328 views

Ornithophilous flowers are usually bright in colour. explain with reason.

Anonymous User Biology Reproductive Health 05 Apr, 2020 74 views

Pollen grains of anemophilous flowers are light,small and winged and are Produced in large numbers.

Anonymous User Biology Reproductive Health 05 Apr, 2020 74 views

State the significance of parthenogenesis

Anonymous User Biology Reproductive Health 05 Apr, 2020 89 views

How subaerial stems help in vegetative propagation?

Anonymous User Biology Reproductive Health 05 Apr, 2020 72 views

Maize plants are monoecious and papaya plants are dioecious.Explain.

Anonymous User Biology Reproductive Health 05 Apr, 2020 79 views