Major Competitive Exams
Q. What is the effect of increasing the distance between the slits in a double-slit experiment on the interference pattern?
A.
Fringe width increases
B.
Fringe width decreases
C.
Fringe intensity increases
D.
Fringe intensity decreases
Show solution
Solution
Increasing the distance between the slits decreases the fringe width, making the fringes closer together.
Correct Answer: B — Fringe width decreases
Learn More →
Q. What is the effect of increasing the distance between the slits in a double-slit experiment on the fringe separation?
A.
Increases fringe separation
B.
Decreases fringe separation
C.
No effect
D.
Fringe separation becomes zero
Show solution
Solution
Increasing the distance between the slits decreases the fringe separation as fringe width is inversely proportional to the slit separation.
Correct Answer: B — Decreases fringe separation
Learn More →
Q. What is the effect of increasing the distance from a current-carrying wire on the magnetic field strength?
A.
It increases
B.
It decreases
C.
It remains constant
D.
It becomes zero
Show solution
Solution
According to the Biot-Savart Law, the magnetic field strength decreases with increasing distance from the current-carrying wire.
Correct Answer: B — It decreases
Learn More →
Q. What is the effect of increasing the distance from a long straight conductor on the magnetic field strength?
A.
Increases
B.
Decreases
C.
Remains constant
D.
Becomes zero
Show solution
Solution
According to Biot-Savart Law, the magnetic field strength decreases with increasing distance from the conductor.
Correct Answer: B — Decreases
Learn More →
Q. What is the effect of increasing the distance from a long straight current-carrying wire on the magnetic field strength?
A.
It increases
B.
It decreases
C.
It remains constant
D.
It becomes zero
Show solution
Solution
According to the Biot-Savart Law, the magnetic field strength decreases with increasing distance from the wire.
Correct Answer: B — It decreases
Learn More →
Q. What is the effect of increasing the distance from a long straight wire on the magnetic field strength?
A.
It increases
B.
It decreases
C.
It remains constant
D.
It becomes zero
Show solution
Solution
The magnetic field strength decreases with increasing distance from a long straight wire, following the inverse relationship with distance.
Correct Answer: B — It decreases
Learn More →
Q. What is the effect of increasing the distance from the pivot point on the torque produced by a force?
A.
Torque increases
B.
Torque decreases
C.
Torque remains the same
D.
Torque becomes zero
Show solution
Solution
Increasing the distance from the pivot point increases the torque produced by the force.
Correct Answer: A — Torque increases
Learn More →
Q. What is the effect of increasing the frequency of an AC source on the inductive reactance of a circuit?
A.
It decreases
B.
It remains the same
C.
It increases
D.
It becomes zero
Show solution
Solution
Inductive reactance (XL) is given by XL = 2πfL, so increasing the frequency (f) increases the inductive reactance.
Correct Answer: C — It increases
Learn More →
Q. What is the effect of increasing the frequency of incident light on the photoelectric current?
A.
Increases indefinitely
B.
Decreases
C.
Remains constant
D.
Increases until a threshold frequency is reached
Show solution
Solution
The photoelectric current increases with frequency until the threshold frequency is reached, after which it depends on intensity.
Correct Answer: D — Increases until a threshold frequency is reached
Learn More →
Q. What is the effect of increasing the frequency of the AC supply on the inductive reactance? (2020)
A.
Increases
B.
Decreases
C.
Remains constant
D.
Becomes zero
Show solution
Solution
Inductive reactance increases with frequency, as X_L = 2πfL.
Correct Answer: A — Increases
Learn More →
Q. What is the effect of increasing the frequency of the alternating current in an inductor?
A.
Inductive reactance decreases
B.
Inductive reactance increases
C.
Inductive reactance remains constant
D.
Inductive reactance becomes zero
Show solution
Solution
Inductive reactance (XL) is given by the formula XL = 2πfL, where f is the frequency. Thus, increasing frequency increases inductive reactance.
Correct Answer: B — Inductive reactance increases
Learn More →
Q. What is the effect of increasing the frequency on the capacitive reactance in an AC circuit? (2022)
A.
Increases
B.
Decreases
C.
Remains the same
D.
Becomes zero
Show solution
Solution
Capacitive reactance Xc = 1/(2πfC), so increasing frequency decreases Xc.
Correct Answer: B — Decreases
Learn More →
Q. What is the effect of increasing the frequency on the capacitive reactance?
A.
Increases
B.
Decreases
C.
Remains the same
D.
Becomes zero
Show solution
Solution
Capacitive reactance X_C = 1/(ωC) decreases with increasing frequency.
Correct Answer: B — Decreases
Learn More →
Q. What is the effect of increasing the frequency on the impedance of a capacitor? (2023)
A.
Increases
B.
Decreases
C.
Remains constant
D.
Becomes infinite
Show solution
Solution
The impedance of a capacitor decreases with increasing frequency.
Correct Answer: B — Decreases
Learn More →
Q. What is the effect of increasing the frequency on the impedance of a series RLC circuit?
A.
Increases
B.
Decreases
C.
Remains constant
D.
Depends on R, L, and C
Show solution
Solution
The impedance (Z) of a series RLC circuit depends on the values of resistance (R), inductance (L), capacitance (C), and frequency (f). As frequency increases, the inductive reactance increases and capacitive reactance decreases, affecting the total impedance.
Correct Answer: D — Depends on R, L, and C
Learn More →
Q. What is the effect of increasing the frequency on the impedance of an inductor?
A.
Increases
B.
Decreases
C.
Remains the same
D.
Becomes zero
Show solution
Solution
The impedance of an inductor (Z_L) increases with frequency, as Z_L = jωL, where ω = 2πf.
Correct Answer: A — Increases
Learn More →
Q. What is the effect of increasing the frequency on the total impedance of an RLC circuit? (2020)
A.
It always increases
B.
It always decreases
C.
It can increase or decrease
D.
It remains constant
Show solution
Solution
The total impedance can increase or decrease depending on the relationship between R, XL, and XC as frequency changes.
Correct Answer: C — It can increase or decrease
Learn More →
Q. What is the effect of increasing the height of a satellite on its orbital speed?
A.
Increases speed
B.
Decreases speed
C.
No effect
D.
Doubles speed
Show solution
Solution
Increasing the height of a satellite decreases its orbital speed, as the gravitational force acting on it decreases.
Correct Answer: B — Decreases speed
Learn More →
Q. What is the effect of increasing the intensity of light on the energy of emitted electrons in the photoelectric effect?
A.
It increases the energy
B.
It decreases the energy
C.
It does not affect the energy
D.
It can either increase or decrease the energy
Show solution
Solution
Increasing the intensity of light increases the number of emitted electrons but does not affect their energy, which depends on the frequency.
Correct Answer: C — It does not affect the energy
Learn More →
Q. What is the effect of increasing the intensity of light on the energy of emitted photoelectrons?
A.
Increases energy
B.
Decreases energy
C.
No effect on energy
D.
Energy becomes negative
Show solution
Solution
Increasing the intensity of light increases the number of emitted photoelectrons but does not affect their energy.
Correct Answer: C — No effect on energy
Learn More →
Q. What is the effect of increasing the intensity of light on the maximum kinetic energy of the emitted electrons?
A.
It increases
B.
It decreases
C.
It remains the same
D.
It becomes zero
Show solution
Solution
The maximum kinetic energy of the emitted electrons is dependent only on the frequency of the incident light, not on its intensity.
Correct Answer: C — It remains the same
Learn More →
Q. What is the effect of increasing the intensity of light on the maximum kinetic energy of emitted electrons?
A.
It increases
B.
It decreases
C.
It remains the same
D.
It becomes zero
Show solution
Solution
The maximum kinetic energy of emitted electrons remains the same as it depends only on the frequency of the incident light, not its intensity.
Correct Answer: C — It remains the same
Learn More →
Q. What is the effect of increasing the length of a conductor on its resistance?
A.
Increases resistance
B.
Decreases resistance
C.
No effect
D.
Depends on the material
Show solution
Solution
Resistance (R) is directly proportional to length (L); increasing length increases resistance.
Correct Answer: A — Increases resistance
Learn More →
Q. What is the effect of increasing the length of a conductor on its resistivity?
A.
Increases
B.
Decreases
C.
No effect
D.
Depends on the material
Show solution
Solution
Resistivity is an intrinsic property of the material and does not change with length.
Correct Answer: C — No effect
Learn More →
Q. What is the effect of increasing the mass of a satellite on its orbital radius if the orbital speed is to remain constant?
A.
The orbital radius must increase
B.
The orbital radius must decrease
C.
The orbital radius remains the same
D.
It has no effect on the orbital radius
Show solution
Solution
If the orbital speed is to remain constant, increasing the mass of the satellite requires an increase in the orbital radius due to the balance of gravitational and centripetal forces.
Correct Answer: A — The orbital radius must increase
Learn More →
Q. What is the effect of increasing the mass of a satellite on its orbital radius, assuming the speed remains constant?
A.
The orbital radius increases
B.
The orbital radius decreases
C.
The orbital radius remains the same
D.
It depends on the gravitational force
Show solution
Solution
The mass of the satellite does not affect the orbital radius if the speed is constant, as the gravitational force and centripetal force balance each other.
Correct Answer: C — The orbital radius remains the same
Learn More →
Q. What is the effect of increasing the mass of a satellite on its orbital radius?
A.
It increases the orbital radius.
B.
It decreases the orbital radius.
C.
It has no effect on the orbital radius.
D.
It depends on the altitude.
Show solution
Solution
The mass of the satellite does not affect its orbital radius; it is determined by the mass of the Earth and the orbital speed.
Correct Answer: C — It has no effect on the orbital radius.
Learn More →
Q. What is the effect of increasing the mass of a satellite on its orbital speed?
A.
Increases the orbital speed
B.
Decreases the orbital speed
C.
No effect on orbital speed
D.
Depends on the altitude
Show solution
Solution
The orbital speed of a satellite depends on the mass of the Earth and the radius of the orbit, but not on the mass of the satellite itself. Therefore, increasing the mass of the satellite has no effect on its orbital speed.
Correct Answer: C — No effect on orbital speed
Learn More →
Q. What is the effect of increasing the mass of both objects on the gravitational force between them?
A.
It decreases the force
B.
It increases the force
C.
It has no effect
D.
It depends on the distance
Show solution
Solution
Increasing the mass of either or both objects increases the gravitational force between them.
Correct Answer: B — It increases the force
Learn More →
Q. What is the effect of increasing the molecular weight of a polymer on its viscosity?
A.
Viscosity decreases
B.
Viscosity increases
C.
Viscosity remains the same
D.
Viscosity becomes unpredictable
Show solution
Solution
Increasing the molecular weight of a polymer generally leads to an increase in viscosity due to longer chain lengths and entanglements.
Correct Answer: B — Viscosity increases
Learn More →
Showing 10171 to 10200 of 17824 (595 Pages)