Asked/Added Questions From NCERT: Physics

 The band of seven colours obtained by dispersion of white light is called spectrum.

-Answered by Rohit Rajput On 23 October 2019:10:31:38 AM

-Answered by Rahul Kumar On 14 October 2019:06:08:53 PM

The current flow more easily through a thick wire as compared to thin wire of the same material, when connected to the same source. It is due to the reason that resistance increases with decrease in thickness.

-Answered by Himanshi Verma On 07 October 2019:10:57:13 AM

Advantages of connecting electrical devices in parallel with the battery are as follows:

1) Voltage across each connecting electrical device is same and device take current as per its resistance.

2) Separate on/off switches can be applied across each device.

3) Total resistance in parallel circuit decreases, hence a great current may be drawn from cell.

4) If one electrical device is damaged, then other devices continue  to work properly.

-Answered by Himanshi Verma On 07 October 2019:10:49:00 AM

-Answered by Rohit Rajput On 31 August 2019:09:43:09 AM

-Answered by Shivang Gupta On 25 August 2019:02:44:10 PM

-Answered by Shivang Gupta On 25 August 2019:02:44:21 PM

 An electric motor utilizes the magnetic effect of current. It works on the principle that when a rectangular coil is placed in a magnetic field and current is passed  through it a torque acts on the coil which rotates it continuously. When the coil rotates the shaft to it also rotates and electrical energy supplied to the motor is converted into mechanical energy.

-Answered by Himanshi Verma On 21 August 2019:06:09:13 PM

 A Panel's is designed to absorb the sun's rays as a source of energy for generating electricity or heating.

It is used for 

(i) conduct Electricity.

(ii) To reduce your dependency on the Utility company.

(iii) Absorb heat from the Sun.

-Answered by Prince Rawat On 20 August 2019:09:05:25 AM

 Stretch the thumb, forefinger and middle finger of your left hand such that they are mutually perpendicular. If fore finger points in the direction of magnetic field, middle finger in the direction of current then thumb will point in the direction of motion or force.

-Answered by Himanshi Verma On 18 August 2019:07:08:32 PM

-Answered by Master Purushottam On 22 August 2019:09:21:10 PM

 Because a bulb light up by heating the filament. The heated filament is the source of light, and if the melting of filament of bulb is low. so, it gets melt.

-Answered by Akki chauhan On 19 August 2019:09:38:00 AM

-Answered by priyanshu kumar On 06 October 2019:09:35:50 AM

 A solenoid is a tightly is a tightly wound helical coil of wire whose diameter is small compared to its length.the magnetic field gencrated in the cuntre or core of a curret carrying solenoid is essentially uniform is directed along the axis of the solenoid.

-Answered by priyanshu kumar On 19 August 2019:09:58:38 AM

 The electrons are repelled by the negative charge at the negative terminal of the battery and attracted by the positive charge at the positive terminal. Therefore the electrons drift away from the negative terminal and toward the positive terminal.

-Answered by Himanshi Verma On 26 July 2019:07:54:53 PM

 The electricity developed by rubbing or friction is called frictional electricity.

-Answered by Himanshi Verma On 26 July 2019:07:50:38 PM

 Galvanometer is an instrument that can detect the presence of a current in a circuit. The pointer remains at zero for zero current flowing through it. 

-Answered by Himanshi Verma On 18 July 2019:07:22:40 PM

 The soft iron core, on which the coil is wound plus the coils is called armature.

-Answered by Shalu Shukla On 18 July 2019:07:12:05 PM

Split ring works as commutator in a electric motor. 

-Answered by Master Mind On 18 July 2019:07:21:34 PM

 Split ring work as a commutator, that is direction of flow of current through a circuit.

-Answered by Shalu Shukla On 18 July 2019:07:25:16 PM

 If you holding current carrying conductor in your right hand such that the thumb points towards the direction of current then fingers will show the direction of current. This is known as the Right hand thumb rule.

-Answered by Himanshi Verma On 18 July 2019:07:07:17 PM

 Ans. If magnetic field lines intersect each other then the magnetic field (magnetic field lines) will have two different directions at that point. This is not possible. So they don't intersect.Feb 4, 2018

-Answered by Nishant Nishant On 12 July 2019:06:19:14 PM

Rasistence

-Answered by Harshita Rathore On 24 August 2019:02:57:23 PM

 The angle of incidence in a denser medium for which the angle of refraciton in rarer medium becomes 90° is called the critical angle.

-Answered by Himanshi Verma On 23 March 2019:05:32:30 PM