Question
A shopkeeper mixes 30 kg of rice which he purchased at
₹40/kg and 40 kg of rice which he purchased at ₹28/kg, and he sells the entire mixture at ₹28/kg. What is the profit or loss percentage (approximated to the nearest integer)?Solution
Which property of a wave is related to its frequency?
Rain drops acquire spherical shape due to -
A device used for converting A.C. into D.C. is called –
A metallic conductor of circular cross-section has radius R. If current density varies as J = Jₒ(1−r/R), the total current through the conductor is:...
A parallel plate capacitor is half-filled with a dielectric slab (K = 4). What is its effective capacitance, assuming plate separation d?
If the specific heat at constant pressure Cₚ is greater than Cᵥ , the difference Cₚ -Cᵥ is equal to:
What is the telescope designed to search for earth-size planets in the nearby region of our galaxy, termed as?
The threshold wavelength for a photoelectric surface is 540 nm. Will a light of energy 2.5 eV cause photoemission?
Which device is best suited for measuring the temperature inside metallurgical furnaces?
When do spring tides occur?
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