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To compare EMF of two cells using potentiometer the balancing lengths obtained are 200 cm and 150 cm. The least count of scale is 1 cm. The percentage error in the ratio of EMFs is ____.

To compare EMF of two cells using potentiometer the balancing lengths obtained are 200 cm and 150 cm. The least […]

Which of the following pair of nuclei are isobars of the element?

Which of the following pair of nuclei are isobars of the element? Q. Which of the following pair of nuclei

A parallel plate capacitor with plate separation 5 mm is charged by a battery. On introducing a mica sheet of 2 mm and maintaining the connections of the plates with the terminals of the battery, it is found that it draws 25% more charge from the battery. The dielectric constant of mica is ____.

A parallel plate capacitor with plate separation 5 mm is charged by a battery. On introducing a mica sheet of

A body of mass 14 kg initially at rest explodes and breaks into three fragments of masses in the ratio 2 : 2 : 3. The two pieces of equal masses fly off perpendicular to each other with a speed of 18 m/s each. The velocity of the heavier fragment is ____ m/s.

A body of mass 14 kg initially at rest explodes and breaks into three fragments of masses in the ratio

Suppose a long solenoid of 100 cm length, radius 2 cm having 500 turns per unit length, carries a current I = 10 sin(ωt) A, where ω = 1000 rad/s. A circular conducting loop (B) of radius 1 cm coaxially slided through the solenoid at a speed v = 1 cm/s. The r.m.s. current through the loop when the coil B is inserted 10 cm inside the solenoid is α/√2 μA. The value of α is ____ . [Resistance of the loop = 10Ω]

Suppose a long solenoid carrying alternating current and a conducting loop sliding coaxially through it. Find the rms current induced

The ratio of speeds of electromagnetic waves in vacuum and a medium, having dielectric constant k = 3 and permeability of μ = 2μ₀, is (μ₀ = permeability of vacuum)

The ratio of speeds of electromagnetic waves in vacuum and a medium, having dielectric constant k = 3 and permeability

A paratrooper jumps from an aeroplane and opens a parachute after 2 s of free fall and starts deaccelerating with 3 m/s². At 10 m height from ground, while descending with the help of parachute, the speed of paratrooper is 5 m/s. The initial height of the airplane is _____ m. (g = 10 m/s²)

A paratrooper jumps from an aeroplane and opens a parachute after 2 s of free fall and starts deaccelerating with

Two short dipoles (A, B), A having charges ±2μC and length 1 cm and B having charges ±4μC and length 1 cm are placed with their centres 80 cm apart. The electric field at a point P equidistant from the centres of both dipoles is ___ N/C.

Two short dipoles (A, B), A having charges ±2μC and length 1 cm and B having charges ±4μC and length

The internal energy of a monoatomic gas is 3nRT. One mole of helium is kept in a cylinder having internal cross section area of 17 cm² and fitted with a light movable frictionless piston. The gas is heated slowly by supplying 126 J heat. If the temperature rises by 4°C, then the piston will move ___ cm. (atmospheric pressure = 10⁵ Pa)

The internal energy of a monoatomic gas is 3nRT. One mole of helium is kept in a cylinder having internal

A block is sliding down on an inclined plane of slope θ and at an instant t = 0 this block is given an upward momentum so that it starts moving up on the inclined surface with velocity u. The distance (S) travelled by the block before its velocity become zero, is ____ . (g = gravitational acceleration)

A block is sliding down on an inclined plane of slope θ and at an instant t = 0 this

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