What type of charge flows through an electric wire when it is connected in an electric circuit ?
A) positive
B) negative
C) either
D) neither
1 Answers
Talk Doctor Online in Bissoy App
A copper wire has a resistance of \( 0.60 hm \). Anozner copper wire of the samemass as the first one is dou ble in length of the first. Find the resistance of the second wire.
We know that R = ρl/A R ∝ l R1/R2 = l1/l2 Given ∵ l2 = 2l1 R1 = 0.60 hm R2/R1 = l2/l1 R2/R1 = 2l1/l1 R2 = 2 R1 R2 = 2 x 0.60 R2 = 1.2 hm
2 Answers 3 views
A steel wire is acted upon by a load of 10 N. Calculate the extension produced in the wire, if the strain energy stored in the wire is 1.1 × 10^-3 J.
Given: F = 10 N, Strain energy = 1.1 × 10-3 J, To find: Extension (l) Formula: W = \(\frac{1}{2}\) × F × l Calculation: From formula, l = \(\frac{2\,W}{F}=\frac{2\times1.1\times10^{-3}}{10}\) = 2.2 × 10-4 m. The extension produced in the wire is...
2 Answers 4 views
When we connect the ends of copper wire to the terminals of the battery through the bulb and switch to make a complete circuit
A) When we connect the ends of copper wire to the terminals of the battery through the bulb and switch to make a complete circuit and switch on the circuit
2 Answers 1 views
The net charge flowing through a crosssection of a conductor in unit time is …………………. when the conductor is in open circuit.
Correct option is D) zero
2 Answers 1 views
Three resistors 2 Ω, 3 Ω and R Ω are connected in series to a battery of voltage 20 V. If the current through the circuit
Correct option is C) 15
2 Answers 1 views
If the potential difference in a circuit is 240 V and the resistance is 60 Ω then the current flowing through the circuit is …………………….
Correct option is A) 300 A
2 Answers 2 views
There is no accumulation of electric charge at any junction in an electric circuit.”
A) Kirchhoff’s Junction law
2 Answers 1 views
in an electric circuit fuse is connected in …………………..
B) series to live wire
2 Answers 1 views
Four coulomb charge is uniformly distributed on 2 km long wire. Its linear charge density is
Correct option is: (D) 2 × 10-3 C/m
2 Answers 6 views
Six ampere current flows through a bulb. Find the number of electrons that should flow through the bulb in a time of 4 hrs.
Given: I = 6 A, t = 4 hrs = 4 × 60 × 60 s To find: Number of electrons (N) Formula: I = \(\frac{q}{t}=\frac{Ne}{t}\) Calculation: As we know, e = 1.6 ×...
2 Answers 8 views