Physics Syllabus (JEE Main)

Q. What is the RMS speed of an ideal gas in terms of its temperature and molar mass?
  • A. sqrt((3RT)/M)
  • B. sqrt((2RT)/M)
  • C. sqrt((RT)/M)
  • D. sqrt((3M)/RT)
Q. What is the RMS speed of an ideal gas in terms of temperature and molar mass?
  • A. sqrt((3RT)/M)
  • B. sqrt((RT)/M)
  • C. sqrt((3kT)/m)
  • D. sqrt((2RT)/M)
Q. What is the RMS value of an AC voltage given by V(t) = V0 sin(ωt)?
  • A. V0
  • B. V0/√2
  • C. V0√2
  • D. 0
Q. What is the role of a commutator in a DC motor?
  • A. To convert AC to DC
  • B. To reverse the direction of current
  • C. To increase voltage
  • D. To decrease resistance
Q. What is the role of a demodulator in a communication system?
  • A. To amplify the received signal
  • B. To convert the modulated signal back to its original form
  • C. To filter out noise from the signal
  • D. To encode the signal for transmission
Q. What is the role of a diode in a circuit?
  • A. Resistor
  • B. Capacitor
  • C. Current regulator
  • D. Current rectifier
Q. What is the role of a diode in a semiconductor circuit?
  • A. Amplification
  • B. Rectification
  • C. Oscillation
  • D. Capacitance
Q. What is the role of a fuse in an electrical circuit?
  • A. To increase current
  • B. To decrease voltage
  • C. To protect against overload
  • D. To store energy
Q. What is the role of a moderator in a nuclear reactor?
  • A. To absorb neutrons
  • B. To slow down neutrons
  • C. To increase the temperature
  • D. To shield radiation
Q. What is the role of a p-n junction in a semiconductor device?
  • A. To increase resistance
  • B. To create a depletion region
  • C. To enhance thermal conductivity
  • D. To reduce current flow
Q. What is the role of a semiconductor in a transistor?
  • A. To store charge
  • B. To amplify current
  • C. To insulate
  • D. To generate heat
Q. What is the role of a transistor in electronic circuits?
  • A. Switching
  • B. Amplification
  • C. Signal modulation
  • D. All of the above
Q. What is the role of a transponder in satellite communication?
  • A. To amplify the received signal
  • B. To convert signals from one frequency to another
  • C. To modulate the signal for transmission
  • D. To demodulate the received signal
Q. What is the role of coherence in interference phenomena?
  • A. It determines the intensity of light
  • B. It ensures constant phase difference
  • C. It affects the wavelength
  • D. It changes the speed of light
Q. What is the role of temperature in the behavior of semiconductors?
  • A. It has no effect
  • B. It decreases conductivity
  • C. It increases the number of charge carriers
  • D. It only affects p-type semiconductors
Q. What is the role of the coherent sources in an interference experiment?
  • A. To provide different wavelengths
  • B. To ensure constant phase difference
  • C. To increase the amplitude
  • D. To decrease the wavelength
Q. What is the role of the galvanometer in a potentiometer circuit?
  • A. To measure current
  • B. To measure resistance
  • C. To indicate the balance point
  • D. To provide a reference voltage
Q. What is the role of the galvanometer in a Wheatstone bridge?
  • A. To measure voltage
  • B. To measure current
  • C. To detect balance
  • D. To provide power
Q. What is the role of the jockey in a potentiometer setup?
  • A. To connect the circuit
  • B. To measure current
  • C. To find the balance point
  • D. To provide a fixed voltage
Q. What is the role of the jockey in a potentiometer?
  • A. To measure current
  • B. To connect the circuit
  • C. To find the null point
  • D. To provide a reference voltage
Q. What is the role of the phase change upon reflection in thin film interference?
  • A. It enhances constructive interference
  • B. It enhances destructive interference
  • C. It has no effect
  • D. It changes the wavelength
Q. What is the role of the refractive index in thin film interference?
  • A. It determines the wavelength of light
  • B. It affects the phase change upon reflection
  • C. It has no effect
  • D. It only affects the intensity
Q. What is the root mean square (RMS) value of an alternating current (AC) if its peak value is 10 A?
  • A. 5 A
  • B. 7.07 A
  • C. 10 A
  • D. 14.14 A
Q. What is the root mean square (RMS) value of an alternating current (AC) that has a peak value of 10 A?
  • A. 5 A
  • B. 7.07 A
  • C. 10 A
  • D. 14.14 A
Q. What is the root mean square speed of gas molecules at temperature T?
  • A. (3RT/M)^0.5
  • B. (RT/M)^0.5
  • C. (2RT/M)^0.5
  • D. (RT/3M)^0.5
Q. What is the root mean square speed of gas molecules directly proportional to?
  • A. The square root of the temperature.
  • B. The square of the temperature.
  • C. The mass of the gas molecules.
  • D. The volume of the gas.
Q. What is the root mean square speed of gas molecules in a container at temperature T?
  • A. sqrt(3kT/m)
  • B. sqrt(2kT/m)
  • C. sqrt(kT/m)
  • D. sqrt(3RT/M)
Q. What is the root mean square speed of gas molecules in an ideal gas at temperature T?
  • A. sqrt(3RT/M)
  • B. sqrt(2RT/M)
  • C. sqrt(RT/M)
  • D. sqrt(3kT/m)
Q. What is the shape of a liquid droplet on a surface due to surface tension?
  • A. Flat
  • B. Cylindrical
  • C. Spherical
  • D. Cubical
Q. What is the shape of the equipotential surfaces around a point mass?
  • A. Straight lines
  • B. Parabolas
  • C. Spheres
  • D. Cylinders
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