Question
Which gaseous hydrocarbon is used for ripening of fruits?
Which gaseous hydrocarbon is used for ripening of fruits?
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Subject: Physical Science
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What do you mean by mass defect? Actual mass of proton, neutron and helium nucleus are 1.00728 amu, 1.00867 amu and 4.0015 amu, respectively. What is the mass defect of ⁴₂He (helium) nucleus?
What do you mean by mass defect? Actual mass of proton, neutron and helium nucleus are 1.00728 amu, 1.00867 amu and 4.0015…
Question
State Lenz’s law. “Lenz’s law actually follows the principle of conservation of energy.” — Justify.
State Lenz’s law. “Lenz’s law actually follows the principle of conservation of energy.” — Justify. [1+2]
Question
Three equal resistors connected in series across a source of e.m.f. together dissipate 10 W of power. What would be the power dissipated if the same resistors were connected in parallel across the same source of e.m.f.?
Three equal resistors connected in series across a source of e.m.f. together dissipate 10 W of power. What would be the power…
Question
The series combination of three 20 Ω resistances is connected in parallel combination to a 30 Ω resistance. Determine the equivalent resistance of the final combination.
The series combination of three 20 Ω resistances is connected in parallel combination to a 30 Ω resistance. Determine the equivalent resistance…
Question
What is Hypermetropia? Which type of lens is used to rectify it?
What is Hypermetropia? Which type of lens is used to rectify it? [2+1]
PYQ Item
Madhyamik Class 10 Physical Science Solved Paper 2025
Madhyamik Class 10 Physical Science Question Paper Solved 2025 Physical Science Time – Three Hours Fifteen Minutes (First fifteen minutes for reading the Question…
Question
A ray of light is incident normally on one of the faces of a prism of refracting angle A and refractive index μ. If δ = angle of deviation, then establish the relation between μ, A and δ.
A ray of light is incident normally on one of the faces of a prism of refracting angle A and refractive index…
Question
Prove that with a rectangular glass slab, incident ray and emergent ray are parallel to each other.
Prove that with a rectangular glass slab, incident ray and emergent ray are parallel to each other.
Question
Find the length of an iron rod at 110°C if at 10°C, the length of the rod is 20 cm. [Volume expansion coefficient of iron = 36 × 10⁻⁶ /°C]
Find the length of an iron rod at 110°C if at 10°C, the length of the rod is 20 cm. [Volume expansion…