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29 January 2023 physics questions with solutions
Browse 29 January 2023 Physics questions with solutions. Useful for JEE, NEET, and school exam revision.
Showing 1–10 of 60 questions
- NumericmediumCircular Motion
A radioactive element ²⁴²₉₂X emits two α-particles, one electron and two positrons. The product nucleus is represented by ²³⁴ₚY. The value of P is ____.
JEE Mains29 January 2023Shift 1Morning Shift
Open question & full solution → - NumericmediumCircular Motion
A body cools from 60°C to 40°C in 6 minutes. If temperature of surroundings is 10°C, then after the next 6 minutes, its temperature will be ____ °C.
JEE Mains29 January 2023Shift 1Morning Shift
Open question & full solution → - NumericmediumCircular Motion
A particle of mass 100 g is projected at time t = 0 with a speed 20 m s⁻¹ at an angle 45° to the horizontal as given in the figure. The magnitude of the angular momentum of the particle about the starting point at time t = 2 s is found to be √K kg m² s⁻¹. The value of K is ________. [Take g = 10 m s⁻²] Image
JEE Mains29 January 2023Shift 2Evening Shift
Open question & full solution → - MCQeasyCircular Motion
The time period of a satellite of earth is 24 hours. If the separation between the earth and the satellite is decreased to one fourth of the previous value, then its new time period will become:
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JEE Mains29 January 2023Shift 2Evening Shift
Open question & full solution → - MCQmediumCircular Motion
In a cuboid of dimension 2L × 2L × L, a charge q is placed at the centre of the surface S having area 4L². The flux through the opposite surface to S is given by: Image
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JEE Mains29 January 2023Shift 1Morning Shift
Open question & full solution → - MCQmediumCircular Motion
Two particles of equal mass m move in a circle of radius r under the action of their mutual gravitational attraction. The speed of each particle will be:
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JEE Mains29 January 2023Shift 1Morning Shift
Open question & full solution → - MCQeasyCircular Motion
A block of mass m slides down the plane inclined at angle 30° with an acceleration g/4. The value of coefficient of kinetic friction will be:
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JEE Mains29 January 2023Shift 1Morning Shift
Open question & full solution → - MatchmediumCircular Motion
Match List I with List II:
List 1
Pressure gradient
Energy density
Electric Field
Latent heat
List 2
I. [M⁰L²T⁻²]
II. [ML⁻¹T⁻²]
III. [ML⁻²T⁻²]
IV. [MLT⁻³A⁻¹]
Options
JEE Mains29 January 2023Shift 1Morning Shift
Open question & full solution → - NumericmediumCircular Motion
In a metre bridge experiment the balance point is obtained if the gaps are closed by 2 Ω and 3 Ω. A shunt of X Ω is added to 3 Ω resistor to shift the balancing point by 22.5 cm. The value of X is ____.
JEE Mains29 January 2023Shift 1Morning Shift
Open question & full solution → - NumericmediumCircular Motion
A point charge q₁ = 4q₀ is placed at origin. Another point charge q₂ = -q₀ is placed at x = 12 cm. Charge of proton is q₀. The proton is placed on x-axis so that the electrostatic force on the proton is zero. In this situation, the position of the proton from the origin is _____ cm. Image
JEE Mains29 January 2023Shift 1Morning Shift
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