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... View Article
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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.... 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) \(\begin{array}{l}\vec{P}=\vec{F}.\vec{V}=\left | \vec{F} \right |\left | \vec{V} \right |cos\theta\end{array} \) As... 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... 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... 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.... 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 \(\begin{array}{l}\frac{T_{1}}{T_{2}}=\frac{R_{1}}{R_{2}}^{3/2}\end{array} \) \(\begin{array}{l}\frac{T_{1}}{T_{2}}=\frac{R_{1}}{9R}^{3/2}\end{array} \) \(\begin{array}{l}\frac{T}{T_{2}}=\frac{1}{27}\end{array} \) T2... 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... 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... 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... 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? (kB 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... 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... 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... 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... 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) \(\begin{array}{l}V=V_{0}sin\omega t= 220\sqrt{2}sin(100\pi t_{1})\end{array} \) \(\begin{array}{l}\omega... 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... View Article
A radioactive sample disintegrates via two independent decay processes having half-livesT1/21 and T1/22respectively. The effective half-life, T1/2 of the nuclei is
a. None of the above b. \(\begin{array}{l}T_{1/2}= T_{1/2}^{1}+T_{1/2}^{2}\end{array} \) c. \(\begin{array}{l}T_{1/2}= \frac{T_{1/2}^{1}+T_{1/2}^{2}}{T_{1/2}^{1}-T_{1/2}^{2}}\end{array} \) d. \(\begin{array}{l}T_{1/2}= \frac{T_{1/2}^{1}T_{1/2}^{2}}{T_{1/2}^{1}+T_{1/2}^{2}}\end{array} \) Answer:(d) \(\begin{array}{l}\left (... View Article
In a series LCR resonance circuit, if we change the resistance only, from a lower to higher value
a. The resonance frequency will increase b. The quality factor will increase c. The quality factor and the resonance frequency... View Article
The total number of C–C sigma bond/s in mesityl oxide (C6H10O) is …… (Round off to the Nearest Integer).
Answer: 5 The total number of C–C sigma bonds = 5
KBr is doped with 10-5 mole per cent of SrBr2.
KBr is doped with 10-5 mole per cent of SrBr2. The number of cationic vacancies in 1 g of KBr... View Article
