Physics Syllabus (JEE Main)
Q. In a double-slit experiment, if the screen distance is increased, what happens to the fringe separation?
A.
Fringe separation increases
B.
Fringe separation decreases
C.
Fringe separation remains the same
D.
Fringe separation becomes zero
Show solution
Solution
Fringe separation is directly proportional to the distance from the slits to the screen (D), hence it increases.
Correct Answer: A — Fringe separation increases
Learn More →
Q. In a double-slit experiment, if the screen is moved further away from the slits, what happens to the fringe pattern?
A.
Fringes become wider
B.
Fringes become narrower
C.
Fringe intensity increases
D.
Fringe intensity decreases
Show solution
Solution
Moving the screen further away increases the distance (D) in the fringe width formula, causing the fringes to become wider.
Correct Answer: A — Fringes become wider
Learn More →
Q. In a double-slit experiment, if the screen is moved further away from the slits, what effect does this have on the fringe spacing?
A.
Increases
B.
Decreases
C.
Remains the same
D.
Becomes zero
Show solution
Solution
Moving the screen further away increases the fringe spacing, as fringe width is directly proportional to the distance from the slits.
Correct Answer: A — Increases
Learn More →
Q. In a double-slit experiment, if the wavelength of light is increased, what happens to the distance between the fringes?
A.
Increases
B.
Decreases
C.
Remains the same
D.
Becomes zero
Show solution
Solution
The distance between the fringes increases with an increase in wavelength, as fringe separation is directly proportional to wavelength.
Correct Answer: A — Increases
Learn More →
Q. In a double-slit experiment, what happens to the interference pattern if the distance between the slits is increased?
A.
Pattern becomes wider
B.
Pattern becomes narrower
C.
No change
D.
Pattern disappears
Show solution
Solution
Increasing the distance between the slits decreases the fringe width, making the pattern narrower.
Correct Answer: B — Pattern becomes narrower
Learn More →
Q. In a double-slit experiment, what is the effect of increasing the distance between the slits on the fringe width?
A.
Fringe width increases
B.
Fringe width decreases
C.
Fringe width remains constant
D.
Fringe width becomes zero
Show solution
Solution
Increasing the distance between the slits increases the fringe width because the angle of diffraction increases.
Correct Answer: A — Fringe width increases
Learn More →
Q. In a fluid at rest, the pressure at a depth h is given by which equation?
A.
P = ρgh
B.
P = ρg/h
C.
P = ρg + h
D.
P = gh/ρ
Show solution
Solution
The pressure at a depth h in a fluid is given by P = ρgh, where ρ is the fluid density and g is the acceleration due to gravity.
Correct Answer: A — P = ρgh
Learn More →
Q. In a fluid flowing through a pipe, what effect does increasing the temperature have on its viscosity?
A.
Increases viscosity
B.
Decreases viscosity
C.
No effect
D.
Depends on the fluid
Show solution
Solution
Increasing the temperature generally decreases the viscosity of a fluid, making it flow more easily.
Correct Answer: B — Decreases viscosity
Learn More →
Q. In a fluid flowing through a pipe, which factor does NOT affect the viscosity?
A.
Temperature
B.
Pressure
C.
Fluid density
D.
Fluid composition
Show solution
Solution
While temperature, pressure, and fluid composition affect viscosity, fluid density does not directly affect viscosity.
Correct Answer: C — Fluid density
Learn More →
Q. In a forced oscillation system, if the driving frequency is equal to the natural frequency, what phenomenon occurs?
A.
Damping
B.
Resonance
C.
Phase shift
D.
Destructive interference
Show solution
Solution
When the driving frequency equals the natural frequency, resonance occurs, leading to maximum amplitude.
Correct Answer: B — Resonance
Learn More →
Q. In a forced oscillation system, the driving frequency is 5 Hz and the natural frequency is 4 Hz. What is the ratio of the driving frequency to the natural frequency?
A.
0.8
B.
1
C.
1.25
D.
1.5
Show solution
Solution
Ratio = driving frequency / natural frequency = 5 Hz / 4 Hz = 1.25.
Correct Answer: C — 1.25
Learn More →
Q. In a forced oscillation system, what is the effect of increasing the amplitude of the driving force?
A.
Decreases the amplitude of oscillation
B.
Increases the amplitude of oscillation
C.
Has no effect on amplitude
D.
Causes the system to stop oscillating
Show solution
Solution
Increasing the amplitude of the driving force generally increases the amplitude of the oscillation in a forced system.
Correct Answer: B — Increases the amplitude of oscillation
Learn More →
Q. In a forced oscillation, if the amplitude is maximum, what can be said about the relationship between the driving frequency and the natural frequency?
A.
Driving frequency is less
B.
Driving frequency is equal
C.
Driving frequency is greater
D.
Driving frequency is unpredictable
Show solution
Solution
Maximum amplitude occurs when the driving frequency is equal to the natural frequency.
Correct Answer: B — Driving frequency is equal
Learn More →
Q. In a forced oscillation, if the amplitude of the oscillation is directly proportional to the driving force, what is the relationship called?
A.
Hooke's Law
B.
Newton's Law
C.
Resonance
D.
Steady state
Show solution
Solution
In forced oscillations, the amplitude is directly proportional to the driving force in the steady state.
Correct Answer: D — Steady state
Learn More →
Q. In a forced oscillation, what happens when the driving frequency matches the natural frequency?
A.
The system oscillates with minimum amplitude
B.
The system oscillates with maximum amplitude
C.
The system stops oscillating
D.
The system oscillates at a different frequency
Show solution
Solution
When the driving frequency matches the natural frequency, resonance occurs, leading to maximum amplitude.
Correct Answer: B — The system oscillates with maximum amplitude
Learn More →
Q. In a forced oscillation, what happens when the driving frequency matches the natural frequency of the system?
A.
The system oscillates with minimum amplitude
B.
The system oscillates with maximum amplitude
C.
The system stops oscillating
D.
The system oscillates at a different frequency
Show solution
Solution
When the driving frequency matches the natural frequency, resonance occurs, leading to maximum amplitude.
Correct Answer: B — The system oscillates with maximum amplitude
Learn More →
Q. In a forced oscillation, what is the effect of increasing the amplitude of the driving force?
A.
Decreases the amplitude of oscillation
B.
Increases the amplitude of oscillation
C.
Has no effect on amplitude
D.
Causes the system to stop oscillating
Show solution
Solution
Increasing the amplitude of the driving force generally increases the amplitude of the forced oscillation.
Correct Answer: B — Increases the amplitude of oscillation
Learn More →
Q. In a forced oscillation, what is the effect of resonance?
A.
Amplitude decreases
B.
Amplitude increases significantly
C.
Frequency decreases
D.
Phase difference becomes zero
Show solution
Solution
At resonance, the driving frequency matches the natural frequency of the system, leading to a significant increase in amplitude.
Correct Answer: B — Amplitude increases significantly
Learn More →
Q. In a forced oscillation, what is the term for the maximum amplitude achieved at resonance?
A.
Resonance peak
B.
Damping peak
C.
Natural frequency
D.
Driving frequency
Show solution
Solution
The maximum amplitude achieved at resonance is referred to as the resonance peak.
Correct Answer: A — Resonance peak
Learn More →
Q. In a gas mixture, the total pressure is equal to the sum of the partial pressures of the individual gases. This is known as:
A.
Dalton's Law
B.
Boyle's Law
C.
Charles's Law
D.
Ideal Gas Law
Show solution
Solution
This principle is known as Dalton's Law of Partial Pressures.
Correct Answer: A — Dalton's Law
Learn More →
Q. In a gas mixture, what is the partial pressure of a gas?
A.
Total pressure of the mixture
B.
Pressure exerted by the gas alone
C.
Pressure exerted by all gases
D.
Pressure at absolute zero
Show solution
Solution
The partial pressure of a gas in a mixture is the pressure that gas would exert if it occupied the entire volume alone.
Correct Answer: B — Pressure exerted by the gas alone
Learn More →
Q. In a gas mixture, which law can be used to find the total pressure exerted by the gases?
A.
Dalton's Law of Partial Pressures
B.
Boyle's Law
C.
Charles's Law
D.
Ideal Gas Law
Show solution
Solution
Dalton's Law of Partial Pressures states that the total pressure exerted by a mixture of gases is equal to the sum of the partial pressures of each gas.
Correct Answer: A — Dalton's Law of Partial Pressures
Learn More →
Q. In a gas, if the volume is halved while keeping the temperature constant, what happens to the pressure?
A.
It remains the same.
B.
It doubles.
C.
It halves.
D.
It quadruples.
Show solution
Solution
According to Boyle's Law, if the volume is halved while keeping the temperature constant, the pressure doubles.
Correct Answer: B — It doubles.
Learn More →
Q. In a gas, the distribution of molecular speeds is described by which law?
A.
Maxwell-Boltzmann distribution
B.
Bernoulli's principle
C.
Boyle's law
D.
Charles's law
Show solution
Solution
The distribution of molecular speeds in a gas is described by the Maxwell-Boltzmann distribution.
Correct Answer: A — Maxwell-Boltzmann distribution
Learn More →
Q. In a generator, if the speed of rotation is doubled, what happens to the induced EMF?
A.
It doubles
B.
It halves
C.
It remains the same
D.
It becomes zero
Show solution
Solution
The induced EMF in a generator is directly proportional to the speed of rotation. Therefore, if the speed is doubled, the induced EMF also doubles.
Correct Answer: A — It doubles
Learn More →
Q. In a generator, mechanical energy is converted into electrical energy through which principle?
A.
Electromagnetic induction
B.
Thermal conduction
C.
Photoelectric effect
D.
Capacitance
Show solution
Solution
In a generator, mechanical energy is converted into electrical energy through the principle of electromagnetic induction.
Correct Answer: A — Electromagnetic induction
Learn More →
Q. In a generator, mechanical energy is converted into electrical energy through which process?
A.
Electromagnetic induction
B.
Thermal conduction
C.
Photoelectric effect
D.
Electrolysis
Show solution
Solution
In a generator, mechanical energy is converted into electrical energy through the process of electromagnetic induction.
Correct Answer: A — Electromagnetic induction
Learn More →
Q. In a generator, what is the role of the rotating coil in a magnetic field?
A.
To create a magnetic field
B.
To induce current
C.
To store energy
D.
To measure voltage
Show solution
Solution
In a generator, the rotating coil in a magnetic field induces current through electromagnetic induction, converting mechanical energy into electrical energy.
Correct Answer: B — To induce current
Learn More →
Q. In a gravitational field, the potential energy of an object is maximum at which point?
A.
At the surface of the Earth
B.
At infinity
C.
At the center of the Earth
D.
At the highest point in the field
Show solution
Solution
The gravitational potential energy is considered maximum at infinity, where it is defined to be zero.
Correct Answer: B — At infinity
Learn More →
Q. In a harmonic oscillator, the total mechanical energy is constant. What is the form of this energy?
A.
Kinetic energy only
B.
Potential energy only
C.
Sum of kinetic and potential energy
D.
None of the above
Show solution
Solution
In a harmonic oscillator, the total mechanical energy is the sum of kinetic and potential energy, which remains constant over time.
Correct Answer: C — Sum of kinetic and potential energy
Learn More →
Showing 2311 to 2340 of 4582 (153 Pages)