A cell of e.m.f. 1.5V and internal resistance of 2.5Ω is connected in series with…
A cell of e.m.f. 1.5V and internal resistance of 2.5Ω is connected in series with an ammeter of…
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The wave function of a metal is 8.0 x (10^{-19})J. Calculate the wavelength of its…
The wave function of a metal is 8.0 x (10^{-19})J. Calculate the wavelength of its threshold frequency. (Speed…
Which of the following substances is not an insulator?
Which of the following substances is not an insulator? A. Aluminium B. Glass C. Plastic D. Clay E.…
In 24 days a radioactive isotope decreases in mass from 64g to 2g. What is…
In 24 days a radioactive isotope decreases in mass from 64g to 2g. What is the half life…
A transformer with 5500 turns in its primary winding is used between a 240V a.c…
A transformer with 5500 turns in its primary winding is used between a 240V a.c supply and 120V…
Beta particles are
Beta particles are A. electrons B. protons C. neutrons D. helium nuclei E. tritium nuclei Correct Answer: Option…
A lamp marked 100W, 250V is lit for 10 hours. If it operates normally and…
A lamp marked 100W, 250V is lit for 10 hours. If it operates normally and 1KWh of electrical…
A car fuse is marked 15A and operates normally on a 12V battery. Calculate the…
A car fuse is marked 15A and operates normally on a 12V battery. Calculate the resistance of the…
A battery of e.m.f 10V an internal resistance 2Ω is connected to a resistance of…
A battery of e.m.f 10V an internal resistance 2Ω is connected to a resistance of 6Ω. Calculate the…
A rectangular coil can rotate in a magnetic field. The two ends of the coil…
A rectangular coil can rotate in a magnetic field. The two ends of the coil are soldered respectively…