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A block starts moving up an inclined plane of inclination 30° with an initial velocity of v₀.

A block starts moving up an inclined plane of inclination 30° with an initial velocity of v0.It comes back to its initial position with... View Article

A galvanometer coil has 500 turns and each turn has an average area of 3 × 10^–4 m².

A galvanometer coil has 500 turns and each turn has an average area of 3 × 10–4 m2. If a torque of 1.5 Nm is required to keep this... View Article

A massless equilateral triangle EFG of side a

A massless equilateral triangle EFG of side ‘a’ (As shown in figure) has three particles of mass m situated at its vertices. The... View Article

If minimum possible work is done by a refrigerator

If minimum possible work is done by a refrigerator in converting 100 grams of water at 0°C to ice, how much heat (in calories) is released to... View Article

A calorimeter of water equivalent 20 g contains 180 g of water at 25°C.

A calorimeter of water equivalent 20 g contains 180 g of water at 25°C. ‘m’ grams of steam at 100°C is mixed in it till the... View Article

Two light waves having the same wavelength λ in vacuum are in phase initially.

Two light waves having the same wavelength λ in vacuum are in phase initially. Then the first wave travels a path L1 through a medium of... View Article

Hydrogen ion and singly ionized helium atom are accelerated, from rest, through the same potential difference.

Hydrogen ion and singly ionized helium atom are accelerated, from rest, through the same potential difference. The ratio of final speeds of... View Article

A uniform magnetic field B exists in a direction perpendicular to the plane of a square loop made of a metal wire.

A uniform magnetic field B exists in a direction perpendicular to the plane of a square loop made of a metal wire. The wire has a diameter of 4... View Article

The electric field of a plane electromagnetic wave propagating

The electric field of a plane electromagnetic wave propagating along the x direction in vacuum is , at the moment t = 0 is: Option 4 is the answer.... View Article

Concentric metallic hollow spheres of radii R and 4R hold charges Q₁ and Q₂ respectively.

Concentric metallic hollow spheres of radii R and 4R hold charges Q1 and Q2 respectively. Given that surface charge densities of the concentric... View Article

A perfectly diamagnetic sphere has a small spherical cavity at its centre, which is filled with a paramagnetic substance.

A perfectly diamagnetic sphere has a small spherical cavity at its centre, which is filled with a paramagnetic substance. The whole system is... View Article

The radius R of a nucleus of mass number A can be estimated by the formula R = (1.3 × 10^–15)A ^1/3 m.

The radius R of a nucleus of mass number A can be estimated by the formula R = (1.3 × 10–15)A 1/3 m. It follows that the mass density... View Article

To raise the temperature of a certain mass of gas by 50°C at a constant pressure, 160 calories of heat is required.

To raise the temperature of a certain mass of gas by 50°C at a constant pressure, 160 calories of heat is required. When the same mass of gas... View Article

A metallic sphere cools from 50°C to 40°C in 300 s.

A metallic sphere cools from 50°C to 40°C in 300 s. If atmospheric temperature around is 20°C, then the sphere’s temperature... View Article

A block of mass 1.9 kg is at rest at the edge of a table, of height 1 m.

A block of mass 1.9 kg is at rest at the edge of a table, of height 1 m. A bullet of mass 0.1 kg collides with the block and sticks to it. If the... View Article

Two resistors 400 Ω and 800 Ω are connected in series across a 6 V battery.

Two resistors 400 Ω and 800 Ω are connected in series across a 6 V battery. The potential difference measured by a voltmeter of 10 k... View Article

A uniform rod of length ‘l’ is pivoted at one of its ends on a vertical shaft of negligible radius.

A uniform rod of length ‘l’ is pivoted at one of its ends on a vertical shaft of negligible radius. When the shaft rotates at angular... View Article

Which of the following will NOT be observed when a multimeter (operating in resistance measuring mode) probes connected across a component, are just reversed?

1) Multimeter shows NO deflection in both cases i.e. before and after reversing the probes if the chosen component is metal wire. 2) Multimeter... View Article

A particle is moving unidirectionally on a horizontal plane under the action of a constant power supplying energy source.

A particle is moving unidirectionally on a horizontal plane under the action of a constant power supplying energy source. The displacement (s) -... View Article

Amount of solar energy received on the earth’s surface per unit area per unit time is defined a solar constant.

Amount of solar energy received on the earth’s surface per unit area per unit time is defined as solar constant. Dimension of solar... View Article

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