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Imagine that the electron in a hydrogen atom is replaced by a muon (μ).

Imagine that the electron in a hydrogen atom is replaced by a muon (μ). The mass of a muon particle is 207 times that of an electron and the... View Article

A thin circular ring of mass M and radius r is rotating about its axis with an angular speed ω.

A thin circular ring of mass M and radius r is rotating about its axis with an angular speed ω. Two particles having mass m each are now... View Article

A constant power delivering machine has towed a box, which was initially at rest, along a horizontal straight line. The distance moved by the box in time ‘t’ is proportional to

a. t b. t3/2 c. t1/2 d. t2/3 Answer:(b) As force and velocity have the same direction the angle between is 00. x∝t3/2... View Article

Match List – I with List – II

Match List – I with List – II List – I List – II (a) 10 km height over earth's surface (i)... View Article

In Young’s double-slit arrangement, slits are separated by a gap of 0.5 mm, and the screen is placed at a distance of 0.5 m from them.

In Young's double-slit arrangement, slits are separated by a gap of 0.5 mm, and the screen is placed at a distance of 0.5 m from them. The... View Article

A loop of flexible wire of irregular shape carrying current is placed in an external magnetic field. Identify the effect of the field on the wire

a. Loop assumes a circular shape with its plane parallel to field b. Shape of the loop remains unchanged c. Wire gets stretched to become... View Article

The time period of a satellite in a circular orbit of radius R is T. The period of another satellite in a circular orbit of radius 9R is

a. 3T b. 9 T c. 27 T d. 12T Answer:(c) T2∝ R3 T2 = 27T... View Article

An oil drop of radius 2 mm with a density of 3 g cm^–3 is held stationary under a constant electric field 3.55×10⁵ V m^–1 in Millikan’s oil drop experiment.

An oil drop of radius 2 mm with a density of 3 g cm–3 is held stationary under a constant electric field 3.55×105 V m–1 in... View Article

The time period of a simple pendulum is given by T = 2√(l/g).

The time period of a simple pendulum is given by T = 2√(l/g). The measured value of the length of the pendulum is 10 cm known to a 1 mm... View Article

Your friend is having an eyesight problem.

Your friend is having an eyesight problem. She is not able to see clearly a distant uniform window mesh and it appears to her as non-uniform and... View Article

What will be the average value of energy along one degree of freedom for an ideal gas in thermal equilibrium at a temperature T? (k_B is Boltzmann constant)

a. kBT b. (⅔)kBT c. (3/2) kBT d. (½) kBT Answer: (d) Energy associated with each degree of freedom is (½)kBT.... View Article

A particle is travelling, 4 times as fast as an electron. Assuming the ratio of the de-Broglie wavelength of a particle to that of the electron is 2:1, the mass of the particle is

a. 1/16 times of mass of e– b. 1/6 times the mass of e– c. 1/8 times the mass of e– d. 8 times the mass of e– Answer:... View Article

A plane electromagnetic wave of frequency 100 MHz is travelling in a vacuum along the x-direction.

A plane electromagnetic wave of frequency 100 MHz is travelling in a vacuum along the x-direction. At a particular point in space and time,... View Article

Four identical long solenoids A, B, C and D are connected to each other as shown in the figure.

Four identical long solenoids A, B, C and D are connected to each other as shown in the figure. If the magnetic field at the centre of A is 3 T,... View Article

An AC source rated 220V, 50 Hz is connected to a resistor. The time taken by the current to change from its maximum to the rms value is:

a. 0.25 ms b. 25 ms c. 2.5 ms d. 2.5 s Answer: (c) Δt=t1- t2=(1/200) - (1/400) Δt=(1/400) sec=... View Article

In the experiment of Ohm’s law, a potential difference of 5.0 V is applied across the end of a conductor of length 10.0 cm and diameter of 5.00 mm.

In the experiment of Ohm's law, a potential difference of 5.0 V is applied across the end of a conductor of length 10.0 cm and diameter of 5.00... View Article

A radioactive sample disintegrates via two independent decay processes having half-livesT_1/2¹ and T_1/2²respectively. The effective half-life, T_1/2of the nuclei is

a. None of the above b. c. d. Answer:(d)... View Article

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