Physics
Download Q&A
Q. A gas expands from 2 L to 5 L at a constant pressure of 1 atm. How much work is done by the gas? (2023)
Q. A gas expands from a volume of 2 m³ to 5 m³ at a constant pressure of 100 kPa. What is the work done by the gas? (2022)
Q. A gas expands from volume V1 to V2 at constant pressure P. What is the work done by the gas? (2022)
Q. A gas expands from volume V1 to V2 at constant temperature. If the initial pressure is P1, what is the final pressure P2? (2020)
Q. A gas expands isothermally at 300 K and absorbs 600 J of heat. What is the work done by the gas? (2023)
Q. A gas expands isothermally at 300 K from a volume of 1 m³ to 2 m³. If the pressure at the initial state is 100 kPa, what is the work done by the gas?
Q. A gas expands isothermally at 300 K from a volume of 1 m³ to 2 m³. If the pressure of the gas is 100 kPa, what is the work done by the gas? (2020)
Q. A gas is compressed adiabatically. Which of the following statements is true? (2023)
Q. A gas is compressed isothermally from a volume of 4 L to 1 L at a constant temperature of 300 K. If the initial pressure is 1 atm, what is the final pressure?
Q. A light ray strikes a plane mirror at an angle of incidence of 30 degrees. What is the angle of reflection? (2021)
Q. A long straight wire carries a current I. What is the direction of the magnetic field at a point located directly above the wire? (2020)
Q. A loop of wire is moved into a magnetic field at a constant speed. What happens to the induced current as the loop enters the magnetic field? (2023)
Q. A loop of wire is placed in a changing magnetic field. What phenomenon occurs? (2021)
Q. A loop of wire is placed in a uniform magnetic field. If the field strength is increased, what happens to the induced current? (2023)
Q. A loop of wire is placed in a uniform magnetic field. If the magnetic field is increased uniformly, what happens to the induced current in the loop?
Q. A loop of wire is rotated in a uniform magnetic field. What is the effect on the induced current? (2019)
Q. A machine does 1200 J of work in 60 seconds. What is its efficiency if the input energy is 2000 J? (2022)
Q. A machine does 1500 J of work in 30 seconds. What is its power output?
Q. A magnetic field is directed into the plane of the paper. If a positive charge moves to the right, what is the direction of the magnetic force acting on it? (2021)
Q. A mass attached to a spring oscillates with a frequency of 1 Hz. What is the period of oscillation? (2023)
Q. A mass attached to a spring oscillates with a frequency of 2 Hz. What is the period of oscillation? (2023)
Q. A mass attached to a spring oscillates with a frequency of 2 Hz. What is the period of the oscillation?
Q. A mass attached to a spring oscillates with a period of 2 seconds. What is its frequency? (2014)
Q. A mass m is attached to a string of length L and is swung in a vertical circle. What is the tension in the string at the top of the circle? (2023)
Q. A mass of 0.5 kg is attached to a spring with a spring constant of 200 N/m. What is the frequency of oscillation? (2021)
Q. A mass-spring system oscillates with a frequency of 1 Hz. What is the angular frequency? (2023)
Q. A mass-spring system oscillates with a frequency of 5 Hz. What is the angular frequency? (2021)
Q. A mass-spring system oscillates with an amplitude of 0.1 m. What is the maximum speed of the mass if the angular frequency is 20 rad/s?
Q. A metal rod is heated at one end. If the temperature at the heated end is 100°C and the other end is at 20°C, what is the temperature gradient along the rod?
Q. A metal rod of length 1 m and cross-sectional area 1 cm² is heated at one end. If the temperature difference between the ends is 100°C, what is the rate of heat transfer through the rod? (Thermal conductivity of the metal = 200 W/m°C)