Email

Chat with tutors

Login

Ask Questions, Get Answers

Menu X

home ask tuition questions practice papers mobile tutors pricing

X

Recent questions tagged electric-current-concepts

Consider the following statements \[\] Statement 1: The electric bulb glows immediately when switch is turned on \[\] Statement 2: The drift velocity of electrons is very high in metallic conductors

asked Feb 16, 2014 by thanvigandhi_1

1 answer

Which of the following statements is false? \[\] The potential difference across the terminals of a non-ideal battery is

asked Feb 16, 2014 by thanvigandhi_1

1 answer

Which of the following is incorrect: \[\] When a potential difference is applied across, the current passing through

asked Feb 16, 2014 by thanvigandhi_1

1 answer

Alternating current cannot be measured by $DC$ ammeter because

asked Feb 16, 2014 by thanvigandhi_1

1 answer

What is the dimensional formula for capacitance?

asked Feb 15, 2014 by thanvigandhi_1

1 answer

What is the average drift speed of conduction electrons in a copper wire of cross-sectional area $1.0 \times 10^{–7}m^2$ carrying a current of $1.5 A$. Assume that each copper atom contributes roughly one conduction electron. The density of copper is $ 9.0 \times 10^3 kg/m^3 $ , and its atomic mass is $ 63.5 u.$

asked Feb 14, 2014 by thanvigandhi_1

1 answer

Which of the following is an example of ohmic conductor:

asked Feb 14, 2014 by thanvigandhi_1

1 answer

If $400ohms $ of resistance is made by adding four $ 100 \: ohm $ resistances of tolerance 5%, then the tolerance of the combination is:

asked Feb 13, 2014 by thanvigandhi_1

1 answer

The potential difference across the terminals of the battery (with $2\;ohms$ internal resistance) is

asked Feb 13, 2014 by thanvigandhi_1

1 answer

The current passing through the $ 3\Omega$ resistor is

asked Feb 13, 2014 by thanvigandhi_1

1 answer

Two conductors have the same resistance at $0^{\circ} C$ but their temperature coefficients of resistance are $ \alpha 1 \: and \: \alpha 2$. The temperature coefficient for the parallel combination is

asked Feb 13, 2014 by thanvigandhi_1

1 answer

Two conductors have the same resistance at $0^{\circ}C$ but their temperature coefficient of resistance are $ \alpha 1\: and \: \alpha 2$. The temperature coefficient for the series combination is

asked Feb 13, 2014 by thanvigandhi_1

1 answer

When no current passes through a conductor

asked Feb 13, 2014 by thanvigandhi_1

1 answer

A current passes through a resistor. Let K1 and K2 be the average kinetic energy of the conduction electrons and metal ions respectively. Then:

asked Feb 13, 2014 by thanvigandhi_1

1 answer

A metallic resistor is connected across a battery. If the number of collisions of free electrons with the lattice is somehow decreased in the resistor, the current will

asked Feb 13, 2014 by thanvigandhi_1

2 answers

Current passing through the $1\: ohm$ resistor is zero. The value of $ E$ is

asked Feb 10, 2014 by thanvigandhi_1

1 answer

Which of these is correct for each pair of statements? \[\] Statement 1: The conductivity of molten electrolytes is smaller than common metallic conductors. \[\] Statement 2: Positive and negative ions flow in opposite directions.

asked Feb 10, 2014 by thanvigandhi_1

1 answer

Which of these is correct for each pair of statements? \[\] Statement 1: When a battery is short-circuited, the terminal voltage is zero \[\] Statement 2: In the situation of a short-circuit, the current is zero

asked Feb 10, 2014 by thanvigandhi_1

1 answer

Which of these is correct for each pair of statements? \[\] Statement 1: When an electric current at the junction of two wires of the same material is directed from the thick wire to the thin wire, the drift speed of the electrons increase as they pass through the cross-section \[\] Statement 2: The drift speed of electrons is directly proportional to the electric field in the wire.

asked Feb 10, 2014 by thanvigandhi_1

1 answer

In a Hydrogen atom, an electron moves in an orbit of radius $5 \times 10^{-11}m$ with a speed of $2.2 \times 10^6 m/s.$ Calculate the equivalent current.

asked Feb 10, 2014 by thanvigandhi_1

1 answer

How many electrons flow through the filament of a $120V, 60W $ bulb in one second?

asked Feb 10, 2014 by thanvigandhi_1

1 answer

A current of $1A $ is passing through $ CuSO_4 $ solution. How many $Cu^{+2}ions$ ions will be deposited at the cathode in 5 seconds?

asked Feb 10, 2014 by thanvigandhi_1

1 answer

Calculate the mean free path in $Cu$ at room temperature $300K$, if the number density of free electrons is $8.5 \times 10^{28}/m^3$ and resistivity $r = 1.7 \times 10^{-8} mho-m$. Given $k = 1.38 \times 10^{-23} J/K \: and\: 1A = 10^{-10} m$

asked Feb 10, 2014 by thanvigandhi_1

1 answer

This question has statement I and statement II. Of the four choices given after the statements, choose the one that best describes the two statements. \[\] Statement- I: Electrons in a conductor have no motion in the absence of a potential difference across it. \[\] Statement- II: The electric field inside the static conductor is always zero.

asked Feb 8, 2014 by thanvigandhi_1

1 answer

A steady current flows in a metallic conductor of non-uniform cross-section. The quantity/quantities constant along the length of the conductor are

asked Feb 8, 2014 by thanvigandhi_1

1 answer

As the temperature of the conductor increases, the ratio of resistivity to conductivity

asked Feb 3, 2014 by thanvigandhi_1

1 answer

Which of the following quantity associated with the resistor, does not change with temperature

asked Feb 3, 2014 by thanvigandhi_1

1 answer

The net resistance of a voltmeter should be large to ensure that

asked Feb 3, 2014 by thanvigandhi_1

1 answer

The net resistance of an ammeter should be small to ensure that

asked Feb 3, 2014 by thanvigandhi_1

1 answer

In an electric circuit containing a battery, the charge (positive by convention) inside the battery

asked Feb 3, 2014 by thanvigandhi_1

1 answer

To see more, click for the full list of questions or popular tags.

Feedback Terms Facebook Twitter About Us

Your payment for is successful.

...