Q. What is the effect of increasing the speed of a conductor moving through a magnetic field on the induced EMF?
A.
Increases the induced EMF
B.
Decreases the induced EMF
C.
No effect on the induced EMF
D.
Induced EMF becomes zero
Show solution
Solution
According to Faraday's law, the induced EMF is directly proportional to the rate of change of magnetic flux, which increases with speed.
Correct Answer: A — Increases the induced EMF
Learn More →
Q. What is the effect of increasing the speed of a magnet moving through a coil?
A.
Induced current decreases
B.
Induced current increases
C.
No change in induced current
D.
Induced current becomes zero
Show solution
Solution
Increasing the speed of the magnet increases the rate of change of magnetic flux through the coil, which increases the induced current according to Faraday's law.
Correct Answer: B — Induced current increases
Learn More →
Q. What is the effect of increasing the steric hindrance on the reactivity of aldehydes and ketones?
A.
Increases reactivity
B.
Decreases reactivity
C.
No effect
D.
Reactivity depends on solvent
Show solution
Solution
Increasing steric hindrance decreases the reactivity of ketones compared to aldehydes.
Correct Answer: B — Decreases reactivity
Learn More →
Q. What is the effect of increasing the surface area of an object on its rate of heat transfer by radiation?
A.
Decreases
B.
Increases
C.
Remains constant
D.
Becomes zero
Show solution
Solution
Increasing the surface area of an object increases the rate of heat transfer by radiation, as more surface is available for emitting energy.
Correct Answer: B — Increases
Learn More →
Q. What is the effect of increasing the surface area of an object on its rate of heat transfer?
A.
Increases
B.
Decreases
C.
No effect
D.
Depends on the material
Show solution
Solution
Increasing the surface area of an object increases the rate of heat transfer, as more area is available for heat exchange.
Correct Answer: A — Increases
Learn More →
Q. What is the effect of increasing the surface charge density on the electric field of a charged plane sheet?
A.
Increases
B.
Decreases
C.
No effect
D.
Becomes zero
Show solution
Solution
The electric field due to a charged plane sheet is directly proportional to the surface charge density; increasing σ increases E.
Correct Answer: A — Increases
Learn More →
Q. What is the effect of increasing the surface roughness on the coefficient of friction?
A.
Increases
B.
Decreases
C.
No effect
D.
Depends on the material
Show solution
Solution
Increasing surface roughness generally increases the coefficient of friction due to greater interlocking between the surfaces.
Correct Answer: A — Increases
Learn More →
Q. What is the effect of increasing the temperature of a conductor on its resistance? (2019)
A.
Resistance decreases
B.
Resistance increases
C.
Resistance remains constant
D.
Resistance fluctuates
Show solution
Solution
Generally, the resistance of a conductor increases with an increase in temperature.
Correct Answer: B — Resistance increases
Learn More →
Q. What is the effect of increasing the temperature of a gas at constant volume?
A.
Pressure decreases
B.
Pressure increases
C.
Volume increases
D.
Density increases
Show solution
Solution
Increasing the temperature of a gas at constant volume results in an increase in pressure, according to Gay-Lussac's law.
Correct Answer: B — Pressure increases
Learn More →
Q. What is the effect of increasing the temperature of a gas on its pressure, assuming volume is constant?
A.
Pressure decreases
B.
Pressure increases
C.
Pressure remains constant
D.
Pressure becomes zero
Show solution
Solution
Increasing the temperature of a gas at constant volume increases the pressure, as per Gay-Lussac's law.
Correct Answer: B — Pressure increases
Learn More →
Q. What is the effect of increasing the temperature of a gas on the speed of sound in that gas?
A.
Increases
B.
Decreases
C.
Remains the same
D.
Depends on pressure
Show solution
Solution
The speed of sound in a gas increases with an increase in temperature.
Correct Answer: A — Increases
Learn More →
Q. What is the effect of increasing the temperature on the average speed of gas molecules?
A.
Average speed decreases
B.
Average speed remains constant
C.
Average speed increases
D.
Average speed becomes zero
Show solution
Solution
Increasing the temperature increases the average kinetic energy of gas molecules, which in turn increases their average speed.
Correct Answer: C — Average speed increases
Learn More →
Q. What is the effect of increasing the temperature on the density of most liquids?
A.
Increases density
B.
Decreases density
C.
No effect
D.
Depends on the liquid
Show solution
Solution
For most liquids, increasing the temperature decreases the density as the liquid expands.
Correct Answer: B — Decreases density
Learn More →
Q. What is the effect of increasing the temperature on the distribution of molecular speeds in a gas?
A.
The distribution becomes narrower
B.
The distribution becomes wider
C.
The distribution remains unchanged
D.
The average speed decreases
Show solution
Solution
Increasing the temperature increases the average kinetic energy of the molecules, resulting in a wider distribution of molecular speeds.
Correct Answer: B — The distribution becomes wider
Learn More →
Q. What is the effect of increasing the temperature on the equilibrium constant Kc for an endothermic reaction? (2023)
A.
Kc decreases
B.
Kc increases
C.
Kc remains constant
D.
Kc becomes zero
Show solution
Solution
For an endothermic reaction, increasing the temperature shifts the equilibrium to the right, thus increasing the value of Kc.
Correct Answer: B — Kc increases
Learn More →
Q. What is the effect of increasing the temperature on the equilibrium constant of an exothermic reaction?
A.
Increases
B.
Decreases
C.
Remains the same
D.
Depends on the reaction
Show solution
Solution
Increasing the temperature of an exothermic reaction decreases the equilibrium constant.
Correct Answer: B — Decreases
Learn More →
Q. What is the effect of increasing the temperature on the refractive index of a medium?
A.
Increases
B.
Decreases
C.
Remains the same
D.
Depends on the medium
Show solution
Solution
Generally, as temperature increases, the refractive index of a medium decreases due to reduced density.
Correct Answer: B — Decreases
Learn More →
Q. What is the effect of increasing the temperature on the resistance of a conductor?
A.
Resistance decreases
B.
Resistance increases
C.
Resistance remains constant
D.
Resistance fluctuates
Show solution
Solution
Increasing the temperature of a conductor generally increases its resistance due to increased atomic vibrations.
Correct Answer: B — Resistance increases
Learn More →
Q. What is the effect of increasing the temperature on the resistance of the potentiometer wire?
A.
Resistance decreases
B.
Resistance increases
C.
Resistance remains constant
D.
Resistance fluctuates
Show solution
Solution
Increasing the temperature generally increases the resistance of the potentiometer wire due to the increased vibrations of the atoms in the conductor.
Correct Answer: B — Resistance increases
Learn More →
Q. What is the effect of increasing the temperature on the RMS speed of a gas?
A.
Increases
B.
Decreases
C.
Remains constant
D.
Depends on pressure
Show solution
Solution
Increasing the temperature increases the RMS speed, as v_rms is proportional to the square root of temperature.
Correct Answer: A — Increases
Learn More →
Q. What is the effect of increasing the temperature on the solubility of most solid solutes in water? (2023)
A.
Increases solubility
B.
Decreases solubility
C.
No effect
D.
Depends on the solute
Show solution
Solution
For most solid solutes, increasing the temperature increases their solubility in water.
Correct Answer: A — Increases solubility
Learn More →
Q. What is the effect of increasing the temperature on the speed of gas molecules?
A.
Speed decreases
B.
Speed remains constant
C.
Speed increases
D.
Speed becomes zero
Show solution
Solution
Increasing the temperature of a gas increases the average kinetic energy of the molecules, which in turn increases their speed.
Correct Answer: C — Speed increases
Learn More →
Q. What is the effect of increasing the tension in a string on the speed of a wave traveling along it?
A.
Speed decreases
B.
Speed increases
C.
Speed remains constant
D.
Speed becomes zero
Show solution
Solution
Increasing the tension in a string increases the speed of the wave, as speed is proportional to the square root of tension.
Correct Answer: B — Speed increases
Learn More →
Q. What is the effect of increasing the tension in a string on the speed of a wave traveling through it?
A.
Increases speed
B.
Decreases speed
C.
No effect
D.
Depends on the mass
Show solution
Solution
Increasing the tension in a string increases the speed of the wave traveling through it, as speed is proportional to the square root of tension.
Correct Answer: A — Increases speed
Learn More →
Q. What is the effect of increasing the transmission power in a communication system?
A.
Increased range
B.
Decreased noise
C.
Higher bandwidth
D.
Lower distortion
Show solution
Solution
Increasing the transmission power generally increases the range of the communication system.
Correct Answer: A — Increased range
Learn More →
Q. What is the effect of increasing the voltage in a circuit with constant resistance? (2019)
A.
Current decreases
B.
Current increases
C.
Current remains the same
D.
Resistance increases
Show solution
Solution
Increasing the voltage while keeping resistance constant will increase the current.
Correct Answer: B — Current increases
Learn More →
Q. What is the effect of increasing the voltage in a circuit? (2020)
A.
Increases current
B.
Decreases resistance
C.
Increases resistance
D.
Decreases current
Show solution
Solution
Increasing the voltage in a circuit increases the current, according to Ohm's Law.
Correct Answer: A — Increases current
Learn More →
Q. What is the effect of increasing the wavelength of incident light on the photoelectric effect?
A.
More electrons are emitted
B.
Fewer electrons are emitted
C.
The kinetic energy of emitted electrons increases
D.
The work function decreases
Show solution
Solution
Increasing the wavelength decreases the frequency of the incident light, which can lead to fewer or no electrons being emitted if the frequency falls below the threshold frequency.
Correct Answer: B — Fewer electrons are emitted
Learn More →
Q. What is the effect of increasing the wavelength of incident light on the photoelectric current?
A.
It increases the current
B.
It decreases the current
C.
It has no effect
D.
It stops the current
Show solution
Solution
Increasing the wavelength decreases the frequency, which may fall below the threshold frequency, thus decreasing or stopping the current.
Correct Answer: B — It decreases the current
Learn More →
Q. What is the effect of increasing the wavelength of light in a diffraction grating experiment?
A.
Fringe spacing decreases
B.
Fringe spacing increases
C.
No effect on fringe spacing
D.
Fringe intensity increases
Show solution
Solution
Increasing the wavelength of light increases the fringe spacing in a diffraction grating experiment.
Correct Answer: B — Fringe spacing increases
Learn More →
Showing 14761 to 14790 of 24796 (827 Pages)