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)
  • A. 3 L·atm
  • B. 5 L·atm
  • C. 2 L·atm
  • D. 1 L·atm
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)
  • A. 300 kJ
  • B. 500 kJ
  • C. 700 kJ
  • D. 3000 kJ
Q. A gas expands from volume V1 to V2 at constant pressure P. What is the work done by the gas? (2022)
  • A. P(V2 - V1)
  • B. P(V1 + V2)
  • C. P(V1 * V2)
  • D. P(V1 - V2)
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)
  • A. P1(V1/V2)
  • B. P1(V2/V1)
  • C. P1
  • D. P1/2
Q. A gas expands isothermally at 300 K and absorbs 600 J of heat. What is the work done by the gas? (2023)
  • A. 600 J
  • B. 300 J
  • C. 900 J
  • D. 0 J
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?
  • A. 0 kJ
  • B. 100 kJ
  • C. 150 kJ
  • D. 200 kJ
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)
  • A. 0 kJ
  • B. 10 kJ
  • C. 20 kJ
  • D. 30 kJ
Q. A gas is compressed adiabatically. Which of the following statements is true? (2023)
  • A. Temperature increases
  • B. Pressure decreases
  • C. Volume increases
  • D. Internal energy decreases
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?
  • A. 4 atm
  • B. 3 atm
  • C. 2 atm
  • D. 1 atm
Q. A light ray strikes a plane mirror at an angle of incidence of 30 degrees. What is the angle of reflection? (2021)
  • A. 30 degrees
  • B. 60 degrees
  • C. 90 degrees
  • D. 45 degrees
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)
  • A. Towards the wire
  • B. Away from the wire
  • C. Clockwise
  • D. Counterclockwise
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)
  • A. It increases
  • B. It decreases
  • C. It remains constant
  • D. It becomes zero
Q. A loop of wire is placed in a changing magnetic field. What phenomenon occurs? (2021)
  • A. Electromagnetic induction
  • B. Magnetic resonance
  • C. Electrolysis
  • D. Magnetic levitation
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)
  • A. It increases
  • B. It decreases
  • C. It remains the same
  • D. It becomes zero
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?
  • A. It increases
  • B. It decreases
  • C. It remains constant
  • D. It becomes zero
Q. A loop of wire is rotated in a uniform magnetic field. What is the effect on the induced current? (2019)
  • A. It remains constant
  • B. It reverses direction
  • C. It increases
  • D. It decreases
Q. A machine does 1200 J of work in 60 seconds. What is its efficiency if the input energy is 2000 J? (2022)
  • A. 60%
  • B. 70%
  • C. 80%
  • D. 90%
Q. A machine does 1500 J of work in 30 seconds. What is its power output?
  • A. 50 W
  • B. 30 W
  • C. 75 W
  • D. 100 W
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)
  • A. Upwards
  • B. Downwards
  • C. To the left
  • D. To the right
Q. A mass attached to a spring oscillates with a frequency of 1 Hz. What is the period of oscillation? (2023)
  • A. 1 s
  • B. 2 s
  • C. 0.5 s
  • D. 0.25 s
Q. A mass attached to a spring oscillates with a frequency of 2 Hz. What is the period of the oscillation?
  • A. 0.5 s
  • B. 1 s
  • C. 2 s
  • D. 4 s
Q. A mass attached to a spring oscillates with a frequency of 2 Hz. What is the period of oscillation? (2023)
  • A. 0.5 s
  • B. 1 s
  • C. 2 s
  • D. 4 s
Q. A mass attached to a spring oscillates with a period of 2 seconds. What is its frequency? (2014)
  • A. 0.5 Hz
  • B. 1 Hz
  • C. 2 Hz
  • D. 4 Hz
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)
  • A. mg
  • B. 2mg
  • C. 3mg
  • D. 0
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)
  • A. 0.5 Hz
  • B. 1 Hz
  • C. 2 Hz
  • D. 4 Hz
Q. A mass-spring system oscillates with a frequency of 1 Hz. What is the angular frequency? (2023)
  • A. 2π rad/s
  • B. π rad/s
  • C. 1 rad/s
  • D. 4π rad/s
Q. A mass-spring system oscillates with a frequency of 5 Hz. What is the angular frequency? (2021)
  • A. 10π rad/s
  • B. 5π rad/s
  • C. 2π rad/s
  • D. 20π rad/s
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?
  • A. 1 m/s
  • B. 2 m/s
  • C. 3 m/s
  • D. 4 m/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?
  • A. 80°C/m
  • B. 20°C/m
  • C. 10°C/m
  • D. 5°C/m
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)
  • A. 200 W
  • B. 400 W
  • C. 600 W
  • D. 800 W
Showing 181 to 210 of 846 (29 Pages)
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