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A proton of mass ' \(m\) ' moving with a speed \(v(<<c\), velocity of light in vacuum) completes a circular orbit in time ' \(T\) ' in a uniform magnetic field. If the speed of the proton is increased to \(\sqrt{2} \mathrm{v}\), what will be time needed to complete the circular orbit?
answered
Dec 15, 2021
in
Kinematics
0
votes
A circular loop of radius ' \(r\) ' of conducting wire connected with a voltage source of zero internal resistance produces a magnetic field 'B' at its centre. If instead, a circular loop of radius ' \(2 r\) ', made of same material, having the same cross section is connected to the same voltage source, what will be the magnetic field at its centre ?
answered
Dec 15, 2021
in
Kinematics
0
votes
An alternating currect is flowing through a series LCR circuit. It is found that the current reaches a value of \(1 \mathrm{~mA}\) at both \(200 \mathrm{~Hz}\) and \(800 \mathrm{~Hz}\) frequency. What is the resonance frequency of the circuit?
answered
Dec 15, 2021
in
Kinematics
0
votes
An electric bulb, a capacitor, a battery and a switch are all in series in a circuit. How does the intensity of light vary when the switch is turned on ?
answered
Dec 15, 2021
in
Kinematics
0
votes
The intensity of a sound appears to an observer to be periodic. Which of the following can be cause of it?
answered
Dec 15, 2021
in
Kinematics
0
votes
Which of the following statement(s) is/are true? "Internal energy of an ideal gas
answered
Dec 15, 2021
in
Kinematics
0
votes
Identify the correct statement(s) : The findings from the Bohr model for H-atom are
answered
Dec 14, 2021
in
Some basic concepts in chemistry
0
votes
During electrolysis of molten \(\mathrm{NaCl}\), some water was added. What will happen?
answered
Dec 14, 2021
in
Some basic concepts in chemistry
0
votes
What will be the normality of the salt solution obtained by neutralizing \(x \mathrm{ml}\) y \((\mathrm{N}) \mathrm{HCl}\) with y \(\mathrm{ml} \mathrm{x}(\mathrm{N}) \mathrm{NaOH}\), and fipally adding \((x+y)\) ml distilled water?
answered
Dec 14, 2021
in
Some basic concepts in chemistry
0
votes
Which of the following solutions will turn violet when a drop of lime juice is added to it?
answered
Dec 14, 2021
in
Some basic concepts in chemistry
0
votes
In a close-packed body-centred cubic lattice of potassium, the correct relation between the atomic radius (r) of potassium and the edge-length (a) of the cube is
answered
Dec 14, 2021
in
Some basic concepts in chemistry
0
votes
How many faradays are required to reduce \(1 \mathrm{~mol}\) of \(Cr_{2} O_{7}{ }^{2-}\) to \(\mathrm{Cr}^{3+}\) in acid medium
answered
Dec 14, 2021
in
Some basic concepts in chemistry
0
votes
Assuming the compounds to be completely dissociated in aqueous solution, identify the pair of the solutions that can be expected to be isotonic at the same temperature:
answered
Dec 14, 2021
in
Some basic concepts in chemistry
0
votes
Which one of the following corresponds to a photon of highest energy?
answered
Dec 14, 2021
in
Some basic concepts in chemistry
0
votes
You are supplied with \(500 \mathrm{ml}\) each of \(2 \mathrm{~N} \mathrm{HCl}\) and \(5 \mathrm{~N} \mathrm{HCl}\). What is the maximum volume of \(3 \mathrm{M} \mathrm{HCl}\) that you can prepare using only these two solutions?
answered
Dec 14, 2021
in
Some basic concepts in chemistry
0
votes
The compound that would produce a nauseating smell/odour with a hot mixture of chloroform and ethanolic potas sium hydroxide is
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Dec 14, 2021
in
Some basic concepts in chemistry
0
votes
ADP and ATP differ in the number of
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Dec 14, 2021
in
Some basic concepts in chemistry
0
votes
The isomerisation of 1-butyne to 2-butyne can be achieved by treatment with
answered
Dec 14, 2021
in
Some basic concepts in chemistry
0
votes
When \(\mathrm{BaCl}_{2}\) is added to an aqueous salt solution, a white precipitate is obtained. The anion among \(\mathrm{CO}_{3}{ }^{2-}\), \mathrm{SO}_{3}{ }^{2-}\) and \(\mathrm{SO}_{4}{ }^{2-}\) that was present in the solution can be :
answered
Dec 14, 2021
in
Some basic concepts in chemistry
0
votes
The correct basicity order of the following lanthanide ions is
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Dec 14, 2021
in
Some basic concepts in chemistry
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