To convert a 800 mV range millivoltmeter of resistance 40Ω into an ammeter of 100 mA
To convert a 800 mV range millivoltmeter of resistance 40Ω into an ammeter of 100 mA range, the resistance to…
8 years ago
Physics
Four identical cells of emf Ԑ and internal resistance r are to be connected in series.
Four identical cells of emf Ԑ and internal resistance r are to be connected in series.Suppose, if one of the…
8 years ago
Masses of 3 wires of same metal are in the ratio 1:2:3 and their lengths
Masses of 3 wires of same metal are in the ratio 1:2:3 and their lengths are in the ratio 3:2:1.…
8 years ago
Which of the following is a vector quantity?
Which of the following is a vector quantity? Options (a) Current density (b) Current (c) Wattless current (d) Power Correct…
8 years ago
A potentiometer wire of length 100cm has a resistance of 10Ω. It is connected in series
A potentiometer wire of length 100cm has a resistance of 10Ω. It is connected in series with a resistance and…
8 years ago
A metal wire of circular cross-section has a resistance R₁. The wire is now stretched
A metal wire of circular cross-section has a resistance R₁. The wire is now stretched without breaking, so that its…
8 years ago
Current flows in semi-conductors through
Current flows in semi-conductors through Options (a) Protons (b) Electrons (c) Holes (d) Holes and electrons Correct Answer: Holes and…
8 years ago
Choose the correct statement
Choose the correct statement Options (a) Kirchhoff's first law of electricity is based on conservation of charge while the second…
8 years ago
Ohm’s law is not applicable except to
Ohm's law is not applicable except to Options (a) Insulator (b) Semi-conductors (c) Arc lamp (d) All of these Correct…
8 years ago
Two wires of equal length and equal diameter and having resistivities ρ₁ and ρ₂
Two wires of equal length and equal diameter and having resistivities ρ₁ and ρ₂ are connected in series. The equivalent…
8 years ago