Electrostatics is the branch of physics that deals with the study of stationary electric charges and their interactions. It covers concepts like electric fields, potential, and charge distribution, essential for understanding phenomena such as static electricity and capacitors.
Physics class 10 chapter 4 notes
Big unit of capacitance is: Farad
The speed of sound in air at 0°C is: 331ms-1
A positive electric charge: Repels other positive charge
One coulomb is equal to charge of ________ electrons: 6.25 x 1018
The speed of sound was accurately measured in: 1738
The SI unit of electric field intensity is: NC-1
The intensity level of whispering is: 30 dB
At room temperature, electrons cannot escape the metal surface due to _____.. of atomic nucleus: Attractive forces
In the presence of a charged body, an insulated conductor develops positive charge at one end and negative charge at the other end, this i called: Electrostatic induction
Volt is named after the Italian physicist: Alessandro volta
NOT gate is also called: Inverter
How many tubes or electron guns used in a colour television set: Three
Electric intensity is a quantity: Vector
If we double the distance between two charges, what will be the change in the force between them: One fourth
The sound level of rustling of leave is: 10 dB
If we double the distance between two charges, then force becomes: 1/4th
SI unit of capacitance is: Farad
If a charged body is brought near a negatively charged electroscope and the leaves of electroscope diverge, then the body is: Negatively charged
Field around a charge in which that charge exerts a force on a point charge brought in that field is called: Magnetic field
The frequency of silent whistle is: 20,000 Hz – 25000Hz
The speed of sound in iron at 25°C is: 5950 m/sec
Electric field lines of force were first introduced by: Farady
The speed of sound in are water at 25°C is: 1531ms-1
An object gains excess negative charge after being rubbed against another object, which is: Negatively charged
Five joules of work is needed to shift 10 C of charge from one place to another. The potential difference between the places is: 0.5 V
The intensity of lawn mover is: 10-2 wm-2
The electrostatic force acting on two charges each of 1 C separated by 1m is about: 9 x 109 N
Two uncharged objects A and B are rubbed against each other. When object B is placed near a negatively charged object C, the two objects repel each other. Which of these statements is true about object A: Becomes positively charged
The SI the unit of charge is: Coulomb
The brain of any computer system is: CPU
Which device is used to store charge: Capacitor
To hear echoes, the minimum distance of the obstacle from source of sound should be: 17m
Sound waves having frequency lower than 20 Hz are called: Infrasonic
The 1st practical electric battery is known as: Voltaic pile
In computer terminology information means: Processed data
One micro coulomb charge is equal to: 10-6C
1 Pico Farad is equal to: 10-12F
Bats can hear sound of frequency up to: 120, 000Hz
The unit of intensity of sound: Wm-2
Level of noise recommended in eight, hour work day: 85-90 dB
The technique or method used to absorb undesirable sounds by soft and porous surface is called: Acoustic protection
Mice can hear frequencies upto: 100, 000 Hz
The intensity level of train siren is: 120 dB
The S.I unit of electric potential is: Volt
Coulomb’s law is mathematically stated as: F = k q1 q2 / r2
Two charged spheres are separated by 2 mm. Which of the following would produced the greatest attractive force: +2 q and -2q
Electric potential is a quantity: Scalar
Mathematical formula of capacitance of a capacitor is: C = Q/V
The pitch of a sound is most closely related to its: Frequency
A positive electric charge: Repels other positive charge
Unlike charges always: Attract each other
SI unit of electric intensity is: NC-1
The speed of sound in air at 100°C is: 386ms-1
The unit of electrical energy is: Electron volt
The speed of sound in air at 21 °C is: 343ms-1
Electric field lines: never cross each other
Which is the most suitable means of reliable continuous communication between an orbiting satellite and earth: Mecrowaves
When frequency of sound wave is increased, which of the following decreases: i) Wavelength ii) Period iii) Amplitude: (i) And (ii) only
1 nano farad is equal to: 1 x 10-9F
Frequency of tuning fork depends upon its _____. of prongs: Mass
When you rub a plastic rod against your hair several times and put it near some bits of paper, the pieces of papers are attracted towards it. What does this observation indicate: the rod and the paper are oppositely charged
Sound waves having frequency higher than 20,000 Hz are called: Ultrasonic
A positive and negative charges are initially 4 cm apart. When they are moved closer together so that they are now only 1 cm apart, the force between them is: 16 times larger than before.
1 bel= 10 dB
Which is used to investigate the properties of electron beam: Electron gun
In case of OR and AND operation, if switches s1 and s2 both are open then lamp is: Off
Old people cannot hear sound above than: 15000 Hz
According to Coulomb’s law , what happens to the attraction of two oppositely charged objects as their distance of separation increases: Decreased
Who developed the 1st practical electric battery: Alessandro volta
SI unit of electric potential is: Volt
Ultrasound waves carry energy: More
Capacitance is defined as: Q/V
1 volt is equal to: JC-1
Which frequency is used by elephants to communicate with each other: Low frequency
X=A.B. This equation is used for which operation: AND
The coulomb’s law is valid for the charges which are: stationary and pont charges
Intensity level of the sound produced by mosquito buzzing is: 40 dB
Safe level of noise depends on factors: Two
Important : Review all previous years’ 10 class past papers for comprehensive practice and better exam preparation.