Recent questions tagged easy

The electron drift speed is estimated to be only a few $mms^{-1} $ for currents in the range of a few amperes. How then is current established almost instant a circuit is closed.

asked Jun 29, 2015 by meena.p

1 answer

Given the resistance of $1 \Omega, 2 \Omega,3 \Omega$ how will you combine thus to get , an equivalent resistance of $(i) \large\frac{11}{3}$$\Omega \qquad (ii) \large\frac{6}{11}$$\Omega \qquad (iii) \large\frac{11}{5}$$\Omega \qquad (iv) 6 \Omega? $

asked Jun 29, 2015 by meena.p

1 answer

Given n resistors each of resistance R, how will you combine them to get, (i) maximum effective resistance (ii) minimum effective resistance ? What is the ratio of the maximum to minimum resistance

asked Jun 29, 2015 by meena.p

1 answer

A high tension (HT) supply of say $6\;KV$ must have a very large internal resistance why ?

asked Jun 29, 2015 by meena.p

1 answer

Is Ohm's law universally applicable for all conducting element ? If not give example of elements which do not obey Ohm's law.

asked Jun 29, 2015 by meena.p

1 answer

A low voltage supply from which one needs high currents must have very low internal resistance why ?

asked Jun 29, 2015 by meena.p

1 answer

A steady current flows in a metallic conductor of non- uniform cross section. Which of these quantities is constant along the conductor ?

asked Jun 29, 2015 by meena.p

1 answer

Electric charge is distributed uniformly on the surface of a spherical rubber balloon. show how the value of electric intensity vary On outside the surface?

asked Apr 29, 2015 by meena.p

1 answer

Electric charge is distributed uniformly on the surface of a spherical rubber balloon. show how the value of electric intensity vary inside the surface ?

asked Apr 29, 2015 by meena.p

1 answer

Electric charge is distributed uniformly on the surface of a spherical rubber balloon. show how the value of electric intensity vary On the surface?

asked Apr 29, 2015 by meena.p

1 answer

Two large thin metal plates are parallel and close to each other. On their inner faces, the plates have surface charge densities of opposite signs and magnitude $17.0 \times 10^{-22}C/m^2$ what is E? between the plates ?

asked Apr 28, 2015 by meena.p

1 answer

Two large thin metal plates are parallel and close to each other. On their inner faces, the plates have surface charge densities of opposite signs and magnitude $17.0 \times 10^{-22}C/m^2$ what is E? In the outer region of the second plate ?

asked Apr 28, 2015 by meena.p

1 answer

Two large thin metal plates are parallel and close to each other. On their inner faces, the plates have surface charge densities of opposite signs and magnitude $17.0 \times 10^{-22}C/m^2$ what is E? In the outer region of the first plate ?

asked Apr 28, 2015 by meena.p

1 answer

A conducting sphere of radius $10\;cm$ has an unknown charge. If the electric field $20\;cm$ from the center of the sphere is $1.5 \times 19^3 N/C$ points radially inwards , what is the net charge on the sphere.

asked Apr 28, 2015 by meena.p

1 answer

What is the net flux of the uniform electric field $ E= 3 \times 10^{3}\; N/C$ through a cube of side $20\;cm$ oriented .So that its faces are parallel to the coordinate plane?

asked Apr 27, 2015 by meena.p

0 answers

What is the net flux of the uniform electric field $ E= 3 \times 10^{3}\; N/C$ through a cube of side $20\;cm$ oriented .So that its faces are parallel to the coordinate plane?

asked Apr 27, 2015 by meena.p

1 answer

An electric dipole with dipole moment $4 \times 10^{-9} \;cm$ is aligned at $30^{\circ}$ with the direction of a uniform electric field of magnitude $5 \times 10^4 N/C$ on the torque acting on the dipole .

asked Apr 27, 2015 by meena.p

1 answer

When a glass red is rubbed with a silk cloth, charge appear on both. A similar phenomenou is observed many other pairs of bodies. Explain how this phenomenon is consistent with the land of conservation charges.

asked Apr 27, 2015 by meena.p

1 answer

Why can one ignore quantization of electric charge when dealing with maeroscopic large scale charge ?

asked Apr 27, 2015 by meena.p

1 answer

Explain the meaning of the statement electronic charge of a body is quantizized .

asked Apr 27, 2015 by meena.p

1 answer

What is the force between two charged spheres having charges of $2 \times 10^{-7}\;C$ and $ 3 \times 10^{-7} C $ placed $30\;cm$ apart in air?

asked Apr 27, 2015 by meena.p

1 answer

An infinite line charge produces a field of $ 9 \times 10^4 \;N/C$ at a distance of $2 \;cm$ . calculated linear charge density.

asked Apr 24, 2015 by meena.p

1 answer

A uniformly charged conducting sphere of diameter $2.4 \;m$ has a surface charge density of $80.0\;\mu C/m^2$ (i) Find the charge on the sphere (ii) what is the total electric flux leaving the surface of the sphere?

asked Apr 24, 2015 by meena.p

1 answer

A uniformly charged conducting sphere of diameter $2.4\;m$ has a surface charge density of $80.0\;\mu c/m^2$ (i) Find the charge on the sphere (ii) What is the total electric flux leaving the surface of the sphere ?

asked Apr 24, 2015 by meena.p

1 answer

Name the dielectric whose molecules have (i) non- zero and (ii) zero dipole moment.

asked Apr 22, 2015 by meena.p

1 answer

Does the charge outside the guassian surface contribute to total electric flux ?

asked Apr 22, 2015 by meena.p

1 answer

An arbitrary surface encloses a dipole, What is the electric flux through this surface ?

asked Apr 22, 2015 by meena.p

1 answer

What is the number of electric lines of force that radiate outward from one coulomb of change in vacuum ?

asked Apr 22, 2015 by meena.p

1 answer

Draw electrostatic field lines for a positive charge Q.

asked Apr 22, 2015 by meena.p

1 answer

An electrostatic field line cannot be discontinuous , why ?

asked Apr 21, 2015 by meena.p

1 answer

An electric dipole of dipole moment $20 \times 10^{-6}$ is enclosed by closed surface. what is the net flex coming out of this surface ?

asked Apr 21, 2015 by meena.p

1 answer

Write the SI unit for electric dipole moment

asked Apr 21, 2015 by meena.p

1 answer

Write the S.I unit of electric field intensity

asked Apr 21, 2015 by meena.p

1 answer

Name the physical quantity whose $S.I$ unit is $JC^{-1}$. Is it a scalar or a vector quantity.

asked Apr 21, 2015 by meena.p

1 answer

The force acting between two print charges $q_1$ and $q_2$ kept at some distance apart in air is attractive or repulsive when (i) q_1q_2 > 0 (ii) q_1 q_2 <0$

asked Apr 21, 2015 by meena.p

1 answer

Define the term electric dipole moment . Is it a scalar or a vector quantity ?

asked Apr 21, 2015 by meena.p

1 answer

Two taps fill in tank in 20 hours. and 10 hours. Two taps are opened first. After how much time the second tap should be closed off so that the tap full in 14 hours ?

asked Dec 8, 2014 by pady_1

0 answers

Pranav does a work in 6 days and Suman does the same work in 14 days. In how many days they together will do the same work?

asked Dec 8, 2014 by pady_1

0 answers

The efficiency of Lohith and Lokesh are 3 : 2, the no. of days they can finish a work will be in ratio ?

asked Dec 8, 2014 by pady_1

1 answer

A train 120 m long passed a pole in 12 seconds. How long will it take to pass a platform 450 m long ?

asked Dec 8, 2014 by pady_1

0 answers

A train running at the speed of 72 km/hr crosses a pole in 11 seconds. What is the length of the train ?

asked Dec 8, 2014 by pady_1

0 answers

How long does a train 115 metres long running at the speed of 90 km/hr. take to cross a bridge 135 metres in length ?

asked Dec 8, 2014 by pady_1

1 answer

In what time will a train 140 metres long cross an electric pole, if its speed be 126 km/hr.

asked Dec 8, 2014 by pady_1

0 answers

Two trains 110 metres and 130 metres long are running in the same direction with speeds of 86 km/hr and 68 km/hr. In how much time will the first train cross the second ?

asked Dec 8, 2014 by pady_1

1 answer

Find the length of the train if it takes 15 sec, travelling at 54 km/hr to cross a man standing beside the track.

asked Dec 8, 2014 by pady_1

0 answers

A train is moving at a speed of 108 km/hr. If the length of the train is 120 metres, how long will it take to cross a railway platform 180 metres long ?

asked Dec 8, 2014 by pady_1

1 answer

A train 120 m long is running at the speed of 54 km/hr. Find the time taken by it to pass a man standing near the railway line.

asked Dec 8, 2014 by pady_1

1 answer

Raju takes 1.5 hours more than Ramu for covering a distance of 20 km. If Raju doubles his speed, then he would take 1 hour less than Ramu. Raju's speed is:

asked Dec 8, 2014 by pady_1

0 answers

A train when moves at an average speed of 60 kmph, reaches its destination on time. When its average speed becomes 45 kmph, then it reaches its destination 30 minutes late. Find the length of journey.

asked Dec 8, 2014 by pady_1

0 answers

One day, a boy from his house walks at a speed of 5 km/hr and reaches his school 2 minutes late. Next day he increases his speed by 1 km/hr and reaches the school 2 minutes early. How far is the school from his house ?

asked Dec 8, 2014 by pady_1

0 answers

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