Recent questions in Current Electricity

Ohm's law is true

asked Mar 20, 2019 by meena.clay6

1 answer

If 5 percent of total current passes through a galvanometer of resistance G, then value of sheet resistance s is

asked Mar 20, 2019 by meena.clay6

1 answer

From Joules law of heating when current I flows through G. resistance R for time t. then Q produced is

asked Mar 20, 2019 by meena.clay6

1 answer

Kirchhoff's current law for a junction as shown

asked Mar 20, 2019 by meena.clay6

1 answer

n identical cells each of E and internal resistance r be connected in services The current through load resistance R

asked Mar 20, 2019 by meena.clay6

1 answer

Deduce the relationship between electric current and drift velocity . hence deduce ohm's law also wri

asked Jun 13, 2017 by pady_1

1 answer

Deduce the relationship between electric current and drop velocity . hence deduce ohm's law also wri

asked Jun 13, 2017 by pady_1

0 answers

with the help of circuit diagram explain how can a potentio meter used to measure the internal Resis

asked Jun 13, 2017 by pady_1

1 answer

with the help of circuit diagram explain how can a potentio meter used to measure the internal Resis

asked Jun 13, 2017 by pady_1

1 answer

With the help of the circuit diagram explain how can a potentio meter the used the compare the E.m.f

asked Jun 13, 2017 by pady_1

1 answer

What are the advantages of potentio meter over a old meter ? 

asked Jun 12, 2017 by pady_1

1 answer

What is potentiometer ? give its construction and principle    

asked Jun 12, 2017 by pady_1

1 answer

What is a wheat stone Bridge ?  When is the bridge said to be balanced ? applied Kirchhoff's la

asked Jun 12, 2017 by pady_1

1 answer

What is a wheat stone Bridge ?  When is the bridge said to be balanced ? applied Kirchhoff's la

asked Jun 12, 2017 by pady_1

1 answer

State Kirchhoff's Rules

asked Jun 12, 2017 by pady_1

1 answer

Define temperature coefficient of resistance?

asked Jun 12, 2017 by pady_1

1 answer

Define resistivity of a material and give unit ?

asked Jun 12, 2017 by pady_1

1 answer

Define OHM'S law 

asked Jun 12, 2017 by pady_1

1 answer

Define OHM'S law 

asked Jun 12, 2017 by pady_1

1 answer

Derive the relation between current and velocity 

asked Jun 12, 2017 by pady_1

1 answer

Derive the relation between current and velocity 

asked Jun 12, 2017 by pady_1

1 answer

Predict the direction of induced current in the situation described above

asked Dec 29, 2016 by priyanka.c

1 answer

Determine the current though the battery of internal resistance $0.5 \Omega$ for the circuit as shown in the figure. How much power is distributed in $6 \Omega$ resistance ?

asked Jul 8, 2015 by meena.p

1 answer

Two batteries of emf $e_1$ and $e_2(e_2 > e_1)$ and internal resistance $r_1$ and $r_2$ respectively are connected in parallel as shown in the figure

asked Jul 7, 2015 by meena.p

1 answer

Consider circuit in the given figure. How much energy is absorbed by electron from the initial state of no current (ignore thermal motion ) to the state of drift velocity ?

asked Jul 7, 2015 by meena.p

1 answer

The adjacent fig shows a $2.0 \;V$ potentiometer used for the determined of internal resistance of a cell $1.5 \;v$ cell. The balance point of the cell is open circuit is $76.3 \;cm$ . When a resistor of $9.5 \Omega$ is used in the external circuit of the cell, the balance point shifts to $6.48 \;cm$ length of the wire . Determine the internal resistance of the cell

asked Jul 7, 2015 by meena.p

1 answer

Determine the current drawn from a 12 v supply with internal resistance $0.5 \Omega$ by the infinite network shown in the figure . Each resistor has $\Omega$ resistance

asked Jul 7, 2015 by meena.p

1 answer

Determine equivalent resistance of network shows in the figure.

asked Jul 7, 2015 by meena.p

1 answer

Given the resistance of $1\Omega,2 \Omega$ and $3 \Omega$ how will be combine them to get an equivalent resistance of $\large\frac{11}{5}$$\Omega$

asked Jul 6, 2015 by meena.p

1 answer

Given the resistance of $1\Omega,2 \Omega$ and $3 \Omega$ how will be combine them to get an equivalent resistance of $\large\frac{11}{3}$$\Omega$

asked Jul 6, 2015 by meena.p

1 answer

Draw V-I graph for ohmic and non- ohmic materials give one example each

asked Jul 6, 2015 by meena.p

1 answer

When the galvanometer shows no deflection , what will be the current flowing through the $5 \Omega$ resistance ?

asked Jul 6, 2015 by meena.p

2 answers

Five equal resistor of each $R \Omega$ are connected as shown in the figures. calculate the equivalent resistance between A and B

asked Jul 6, 2015 by meena.p

1 answer

The colour coded resistor is as shown in the figure . Compute in mega ohm

asked Jul 6, 2015 by meena.p

1 answer

Determine the equivalent resistors of the network shown :

asked Jul 6, 2015 by meena.p

1 answer

An electric kettle has two coils. When one of these is switched on, the water in the kettle boils in 6 minutes. When the other coil is switched on, the water boils in 3 minutes. If the two coils are connected in parallel , find the time taken to boil the water in the kettle .

asked Jul 3, 2015 by meena.p

1 answer

An electric kettle has two coils. When one of these is switched on, the water in the kettle boils in 6 minutes. When the other coil is switched on, the water boils in 3 minutes. If the two coils are connected in series , find the time taken to boil the water in the kettle .

asked Jul 3, 2015 by meena.p

1 answer

An immersion heater is rated $836 walt$ In what time it should heat litre of water from $20^{\circ}$ to $40^{\circ}? J= 4.18 \;J/cal $

asked Jul 3, 2015 by meena.p

1 answer

The earth's surface has a negative surface charge density of $ 10^{-9}cm^{-2}$. The potential difference of $400\;kv$ between the top of the atmosphere and the surface results (due to low conductivity of the lower atmosphere ) in a current of only $1800\;A$ over the entire globe. If their were no mechanism of sustaining atmosphere field, how much time (roughly) would be required to neutralise the the earth's surface ? (This never happen in practice became there is a mechanism to replenish electric charges namely the continual thunder storms and lighting in different parts of the globe) . Radius of the earth $=6.37 \times 10^6m$

asked Jul 3, 2015 by meena.p

1 answer

Which of the following : characteristic of electrons . determines the current in a conductor ?

asked Jul 3, 2015 by meena.p

1 answer

A metal rod of length $10\;cm$ and a rectangular . Cross section of $1 \;cm \times \large\frac{1}{2}$$\;cm$ is connected to a battery across opposite faces. The resistance will be

asked Jul 3, 2015 by meena.p

1 answer

Given resistance of $1 \Omega, 2 \Omega$ and $3 \Omega$ how will we combined them to get an equivalent resistance of $\large\frac{6}{11}$$ \Omega$

asked Jul 3, 2015 by meena.p

1 answer

Given resistance of $1 \Omega, 2 \Omega$ and $3 \Omega$ how will we combined them to get an equivalent resistance of $6 \Omega$

asked Jul 3, 2015 by meena.p

1 answer

Given n resistor each resistance R, What is the ratio of the maximum to minimum resistance ?

asked Jul 3, 2015 by meena.p

1 answer

Given n resistance R, how will you combine them to get the minimum effective resistance ?

asked Jul 3, 2015 by meena.p

1 answer

Given n resistor each resistance R, how will you combine them to get the maximum effective resistance ?

asked Jul 3, 2015 by meena.p

1 answer

The resistivity of a typical insulator (eg: amber) is greater than that of a metal by a factor of the order of ____$(10^{22}/10^{23})$

asked Jul 2, 2015 by meena.p

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The resistivity of the alloy mangain is nearly ____(independent of /increase rapidly) with increase of temperature

asked Jul 2, 2015 by meena.p

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Choose the correct alternative: Alloys usually have must ______( lower/higher ) temperature coefficients of resistance than pure metals

asked Jul 2, 2015 by meena.p

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Choose the correct alternative : Alloys of metals usually have___________ (greater / lesser) resistivity than that of their constituent metals

asked Jul 2, 2015 by meena.p

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