Current Electricity is the study of electric charges in motion, focusing on the flow of electric current through conductors. It includes key concepts like voltage, resistance, Ohm’s Law, and circuits, essential for understanding electrical systems and devices.
Class 10 physics chapter 5 Notes
Image formed on a camera is: Real, inverted, and diminished
Which instrument measures the potential difference: Voltmeter
Current is equal to: Q/t
That period in which voltage repeats its value in equal intervals is called: Time period
Which instrument is used to detect current: Galvanometer
What is the power rating of a lamp connected to a 12 v source when it carries 2.5 A: 30 W
What should household appliances be connected in parallel with the voltage source: to provide each appliance the same voltage as the power source
Which we double the voltage in a simple electric circuit. We double the: Current
What happens to the intensity of the brightness of the lamps connected in series as more and more lamps are added: Decreases
LDR can act as: Switch
What type of graph is in between V and I: Straight line
Battery converts chemical energy into which energy: Electrical
The unit of potential difference is: Volt
An object is placed at the Centre of curvature of a concave mirror. The image produced by the mirror is located: At the centre of curvature
Which type of image is formed by a convex lens on a screen: Inverted and real
We can distinguish between the notes of a piano and flute due to _____ of sound: Quality
The equivalent resistance of a parallel combination is: is smaller than the smallest resistance of combination
In medical field, C.R.O is used to display: Heart beats
Mathematical formula of electromotive force (e.m.f) is: E = W/Q
The resistance of conductors is due to: Fixed atoms
Specific resistance of silver = ________ x 10 sOhm meter: 1.62
The diameter of spherical mirror is called: Aperture
What is the voltage across a 6? resistor when 3 A of current passes through it: 18 V
The characteristics of sound by which we can distinguish between two sounds of same loudness and pitch is called: Quality
Which wire has lowest resistance: Very thin wire
The mirror whose outer surface is reflecting is called: Convex mirror
In OR operation inputs are connected as: Parallel
Specific resistance of copper is _______ x 10 8Ohm meter: 1.69
The current which changes its direction is called: A.C.
Electric potential and e.m.f: are the different terms
The S.I unit of electric current is: Ampere
How Galvanometer is connected in circuit to detect current: In Series
What is the voltage across a 6? resister when 3A current passes through it: 18V
The speed of sound in a liquid is _____..than that in gases: Five times
Example of mechanical waves is: Sound waves
The S.I unit of potential difference is: Volt
The critical angle for a beam of light passing from water into air is 48.8 degrees. This mean that all light rays with an angle of incidence greater than this angle will be: Totally reflected
Electric current in conductors is due to the flow of: Free electrons
The mirror whose inner surface is reflecting is called: Concave mirror
According to Ohm’s law V = IR
The unit of power is: Watt
The distance between principal focus and pole of mirror is called: Focal length
Which of the following quantities is not change during refraction of light: Its frequency
The unit of (?) in formula R=?.L/a is: ?-m
A converging mirror with a radius of 20cm creates a real image 30 cm from the mirror. What is the object distance: 15 cm
If we double both the current and the voltage in a circuit while keeping its resistance constant, the power remains unchanged: four time
The screen of a cathode ray tube consists of a thin layer of: Phosphorus
AND operation is represented by: Dot (.)
The more negative potential of grid, the more electrons will be: Repelled
The ampere is a unit of: Electric current
If a ray of light in glass is incident on an air surface at an angle greater than the critical angle, the ray will: Reflect only
J.J Thomson observed deflection of cathode rays in: 1897
Half of radius of curvature is called: Focal length
Mathematical form of Ohm’s law is: V = IR
In mathematical form of Ohm’s law, “R” is: Resistance
The property of substance, which opposes the flow of current through it is called: Resistance
The sensation of sound persists in our brain for: 0.1 sec
The resistance of voltmeter is: Very high
Which type of image is produced by the converging lens of human eye if it views a distant object: Real, inverted, diminished
The center of curved surface of spherical mirror is called: Pole
Which gate is used for safety alarm: NANAD
The unit of resistance is: ?
Which combination forms NAND gate: AND & NOT
The rate of flow of charge through any cross sectional area is called: Electric current
Joule’s law is W = I2Rt
The point through which rays of light pass after reflection from concave mirror is called principal: Focus
A conductor of electric current is: Copper
An object is 14 cm in front of a convex mirror. The image is 5.8 cm behind the mirror. What is the focal length of the mirror: -9.9 cm
When resistance are connected in series the current passing through them is: The same
The current used in houses is: A.C.
As the temperature of a conductor rises, its resistance: Increase
An electric current in conductors is due to the flow of: free electron
The equivalent resistance in parallel combination is: Rc=1/R1+1/R2+1/R3+……………..+1/Rn
The S.I unit of electric power is: Watt
The A.C. used in our houses has frequency _____ cycle/sec: 50
The index of refraction depends on: The speed of light
Electron gun has an electrode called for controlling the flow of electrons in the beam: Grid
Resistance of conductor is directly proportional to: Length
The combined resistance of two identical resistors, connected in series is 8?. Their combined resistance in a parallel arrangement will be: 2?
Important : Read all previous years’ 10 class past papers for comprehensive practice and better exam preparation.