Resistance and Resistors
Trending Questions
Q. What is the resistance of this 4 strip resistor?
Colours are in order- green, red, blue, golden
Colours are in order- green, red, blue, golden
- [52×103±5%] Ω
- [52×102±5%] Ω
- [52×105±5%] Ω
- [52×106±5%] Ω
Q.
Name the unit of electrical resistance.
Q. A wire of resistance R and length L is pulled and stretched to a length 2L. What is its new resistance?
- 2R
- 4R
- R2
- R
Q. A wire of length 5m and radius 1mm has a resistance of 1 ohm. What length of the wire of the same material at the same temperature and of radius 2mm will also have a resistance of 1 ohm
- 1.25 m
- 2.5 m
- 10 m
- 20 m
Q. What is the conductance of a 3Ω resistor?
- 13ohm
- 3 mho
- 3 ohm
- 13mho
Q. In the circuit shown in figure, find the potential of B and the current through 1 Ω resistance.
- 3 V, 7.5 A
- 2 V, 3 A
- 15 V, 3 A
- 5 V, 7.5 A
Q. A wire of resistance R and length L is pulled and stretched to a length 2L. What is its new resistance?
- 2R
- 4R
- R2
- R
Q. Two resistors of resistances 200 kΩ and 1 MΩ, respectively from a potential divider with outer junctions maintained at potentials of +3 V and −15 V. What is the potential at the junction X between the resistors?
- +1 V
- 0 V
- −0.6 V
- −12 V
Q. The equivalent inductance of the network shown in the figure, between the points a and b is -
Q. A uniform wire of resistance 72Ω is bent in the form of a hexagon (regular), then the effective resistance between A & B is
- 10Ω
- 6Ω
- 8Ω
- 9Ω
Q. Two resistance R1 and R2 are made of different materials. The temperature coefficient of the material of R1 is α and that of the material of R2 is −β. The resistance of the series combination of R1 and R2 does not change with temperature, then the ratio of resistances of the two wires at 0∘C will be:
- 2αβ
- α+βα−β
- α2+β2αβ
- βα
Q. The resistance of resistor at temperature to C can be expressed as Rt=R0(1+2γt+ϕt2), where R0 is the resistance at 0o C and γ, ϕ are constants. The temperature coefficient of the resistance at to C is
- 2(γ+ϕt)(1+2γt+ϕt2)
- 1(1+2γt+ϕt2)
- 2(γ+ϕt)
- 2γt+ϕt2