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A football player is moving southward and suddenly turns eastward with the same speed to avoid an opponent. The force that acts on the player while turning is? NEET UG2023
The temperature of a gas is –50°C. To what temperature the gas should be heated so that the rms speed is increased by 3 times? NEET UG2023
Note1- increased to 3 times and increased by 3 times are different.
In former case final value is 3 times while in latter case the final value is (3+1=4)times of the initial value.
Note-2 the formula has temperature in kelvin so first convert given value to kelvin.
One of the best method for solving questions involving similar cases.
SIMPLY WRITE EQUATION FOR BOTH CASES THEN DIVIDE TO FIND THE RELATION.
For the below question-
The potential energy of a long spring when stretched by 2 cm is U. If the spring is stretched by 8 cm, potential
energy stored in it will be?
you can approach as per discussed method as seen in attached image:
In hydrogen spectrum, the shortest wavelength in the Balmer series is LAMBDA. The shortest wavelength in the Bracket series is ? NEET UG2023
SIMPLY WRITE EQUATION FOR BOTH CASES THEN DIVIDE TO FIND THE RELATION.
Let a wire be suspended from the ceiling (rigid support) and stretched by a weight W attached at its free end. The longitudinal stress at any point of cross-sectional area A of the wire is? NEET UG2023
समर्पण
ये समाज जिसमें आप रहते हो
ये घर जिसमें आप रहते हो
ये हवा जिसमें आप सांस लेते हो
इसकी बेहतरी के लिए काम करना ही
भगवान को समर्पित होना है |
- लवकुश कुमार
An electric dipole is placed at an angle of 30° with an electric field of intensity 2 × 10^5 N C^–1. It experiences a torque equal to 4 N m. Calculate the magnitude of charge on the dipole, if the dipole length is 2 cm. NEET UG 2023
Light travels a distance x in time t1 in air and 10x in time t2 in another denser medium. What is the critical angle for this medium? NEET UG 2023
In a plane electromagnetic wave travelling in free space, the electric field component oscillates sinusoidally at a frequency of 2.0 × 10^10 Hz and amplitude 48 V m^–1. Then the amplitude of oscillating magnetic field is (Speed of light in free space = 3 × 10^8 m s^–1)
V= E/B
for free space v=c
Putting all values in MKS (c=3 × 10^8, E=48 ) we get B=1.6 × 10^–7 Tesla
A full wave rectifier circuit consists of two p-n junction diodes, a centre-tapped transformer, capacitor and a load resistance. Which of these components remove the ac ripple from the rectified output?
Capacitor is used to remove AC ripples because voltage across it doesn't change rapidly so ripples of change are minimized.
AC have ripples because supply have variable voltage throughout its cycle.
One pn diode works in +ve cycle and another in negative cycle.
Center tapped transformer ensures supply of equal voltage to both diodes.
Load resistance is for output.