then
A piece of copper and other of germanium are cooled from the room temperature to 80∘K, then
27
Aug
A piece of copper and other of germanium are cooled from the room temperature to 80∘K, then A piece of copper and other of germanium are cooled from the room temperature to 80∘K then August 27, 2020 Category: Chapter 33 - Semiconductors , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video [...]
At constant volume temperature is increased, then
26
Aug
At constant volume temperature is increased, then At constant volume temperature is increased then August 26, 2020 Category: Chapter 18 - Thermodynamics , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , Physics ,
If cs be the velocity of sound in air and c be the rms velocity, then
26
Aug
If cs be the velocity of sound in air and c be the rms velocity, then If cs be the velocity of sound in air and c be the rms velocity then August 26, 2020 Category: Chapter 18 - Thermodynamics , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , [...]
A body cools from 50 degree c to 49.9 degree c in 5 s. How long wil take to cool from 40 degree c to 39.9 degree c ? ( Assume the temperature of surrounding to be 30 degree c and Newton’s law of cooling to be valid )
26
Aug
A body cools from 50 degree c to 49.9 degree c in 5 s. How long wil take to cool from 40 degree c to 39.9 degree c ? ( Assume the temperature of surrounding to be 30 degree c and Newton’s law of cooling to be valid ) A beaker full of hot water [...]
A beaker full of hot water is kept in a room. If it cools from 80 degree C to 75 degree C in t1 minutes, from 75 degree C to 70 degree C in t2 minutes and from 70 degree C to 65 degree C in t3 minutes, then
26
Aug
A beaker full of hot water is kept in a room. If it cools from 80 degree C to 75 degree C in t1 minutes, from 75 degree C to 70 degree C in t2 minutes and from 70 degree C to 65 degree C in t3 minutes, then A beaker full of hot water [...]
A Centigrade and Fahrenheit thermometers are dipped in boiling water. The water temperature is lowered until the Fahrenheit thermometer registers a temperature of 140 degree. what is the fall of the temperature as registered by the centigrade thermometer ?
26
Aug
A Centigrade and Fahrenheit thermometers are dipped in boiling water. The water temperature is lowered until the Fahrenheit thermometer registers a temperature of 140 degree. what is the fall of the temperature as registered by the centigrade thermometer ? conductivity K1 and K2 and areas of cross section (A1 and A2) and both having temperature [...]
Rate of heat flow through a cylindrical rod is H1. Temperatures of ends of rod are T1 and T2. If all the dimensions of rod become double and temperature difference remains same and rate of heat flow becomes H2. Then
26
Aug
Rate of heat flow through a cylindrical rod is H1. Temperatures of ends of rod are T1 and T2. If all the dimensions of rod become double and temperature difference remains same and rate of heat flow becomes H2. Then conductivity K1 and K2 and areas of cross section (A1 and A2) and both having [...]
Consider two rods of same length and different specific heats (s1 and s2), conductivity K1 and K2 and areas of cross section (A1 and A2) and both having temperature (T1 and T2) at their ends. If the rate of heat loss due to conduction are equal, then
26
Aug
Consider two rods of same length and different specific heats (s1 and s2), conductivity K1 and K2 and areas of cross section (A1 and A2) and both having temperature (T1 and T2) at their ends. If the rate of heat loss due to conduction are equal, then conductivity K1 and K2 and areas of cross [...]
A sonometer wire when vibrated in full length has frequency n. Now, it is divided by the help of bridges into a number of segments of lengths l1,l2,l3… when vibration these segments have frequencies n1,n2,n3,,, Then, the correct relation is
26
Aug
A sonometer wire when vibrated in full length has frequency n. Now, it is divided by the help of bridges into a number of segments of lengths l1,l2,l3… when vibration these segments have frequencies n1,n2,n3,,, Then, the correct relation is A sonometer wire when vibrated in full length has frequency n. Now it is divided [...]
A hospital uses an ultrasonic scanner to locate tumors in a tissue. The operating frequency of the scanner is 4.2 MHz. The speed of sound in a tissue is 1.7 km/s. The wavelength of sound in tissue is close to
26
Aug
A hospital uses an ultrasonic scanner to locate tumors in a tissue. The operating frequency of the scanner is 4.2 MHz. The speed of sound in a tissue is 1.7 km/s. The wavelength of sound in tissue is close to A wave enters to water form air. In air frequency I 1 and v 1 [...]