The dimensions of mobility of charge carriers are
Options
(a) [M⁻²T²A] (b) [M⁻¹T²A] (c) [M⁻²T³A] (d) [M⁻¹T³A]
Correct Answer:
[M⁻¹T²A]
Explanation:
Mobility = drift velocity / electric field μ = v(d) / E = […]
Watt hour meter measures
Options
(a) Current (b) Electric energy (c) Power (d) Voltage
Correct Answer:
Electric energy
Explanation:
No explanation available. Be the first to write the explanation for this question by […]
To convert a 800 mV range millivoltmeter of resistance 40Ω into an ammeter of 100 mA range, the resistance to be connected as shunt is
Options
(a) 10 Ω (b) 20 Ω (c) […]
Four identical cells of emf Ԑ and internal resistance r are to be connected in series.Suppose, if one of the cell is connected wrongly, then the equivalent emf and effective internal resistance of the combination […]
Masses of 3 wires of same metal are in the ratio 1:2:3 and their lengths are in the ratio 3:2:1. The electric resistances are in the ratio
Options
(a) (1:4:9) (b) (9:4:1) (c) (1:2:3) […]
Which of the following is a vector quantity?
Options
(a) Current density (b) Current (c) Wattless current (d) Power
Correct Answer:
Current density
Explanation:
No explanation available. Be the first to write the […]
A potentiometer wire of length 100cm has a resistance of 10Ω. It is connected in series with a resistance and a cell of emf 2V having negligible internal reistance. A source of emf 10 mV […]
A metal wire of circular cross-section has a resistance R₁. The wire is now stretched without breaking, so that its length is doubled and the density is assumed to remain the same. If the resistance […]
Current flows in semi-conductors through
Options
(a) Protons (b) Electrons (c) Holes (d) Holes and electrons
Correct Answer:
Holes and electrons
Explanation:
No explanation available. Be the first to write the explanation for […]
Choose the correct statement
Options
(a) Kirchhoff’s first law of electricity is based on conservation of charge while the second law is based on conservation of energy (b) kirchoff’s first law of electricity […]
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