The temperature coefficient of a resistance wire is 0.00125 per degree.
The temperature coefficient of a resistance wire is 0.00125 per degree. The resistance at 300 K is 1 Ω. At…
7 years ago
Current Electricity
Four cells, each of emf E and internal resistance r, are connected in series across
Four cells, each of emf E and internal resistance r, are connected in series across an external resistance R. By…
7 years ago
Two identical cells of the same e.m.f. and same internal resistance
Two identical cells of the same e.m.f. and same internal resistance give the same current through an external resistance of…
7 years ago
The unit of specific conductivity is
The unit of specific conductivity is Options (a) Ohm⁻¹ cm⁻¹ (b) Ohm cm⁻² (c) Ohm-cm (d) Ohm⁻¹ cm⁻² Correct Answer:…
7 years ago
The equivalent resistance of two resistors connected in series is 6 Ω
The equivalent resistance of two resistors connected in series is 6 Ω and their parallel equivalent resistance is 4/3Ω. What…
7 years ago
Dimensional formula for electrical resistance R is given by
Dimensional formula for electrical resistance R is given by Options (a) [M¹L²T⁻³I⁻²] (b) [ML²T⁻³I⁻²] (c) [ML²T³I⁻²] (d) [ML²T³I²] Correct Answer:…
7 years ago
A uniform wire of resistance 9Ω is joined end-to-end to form a circle. Then
A uniform wire of resistance 9Ω is joined end-to-end to form a circle. Then, the resistance of the circular wire…
7 years ago
The e.m.f. of a battery is 2 V and its internal resistance is 0.5 Ω. The maximum
The e.m.f. of a battery is 2 V and its internal resistance is 0.5 Ω. The maximum power which it…
7 years ago
The temperature coefficient of resistance of an alloy used for making resistor is
The temperature coefficient of resistance of an alloy used for making resistor is Options (a) small and positive (b) small…
7 years ago
The dimensions of mobility of charge carriers are
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]…
7 years ago