ICSE Physics Class 10 Goyal Brothers Solutions. We covered all the ICSE Physics Class 10 Goyal Brothers Solutions MCQs in this post for free so that you can practice well for the exam.
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ICSE Physics Class 10 Goyal Brothers Objective with Solutions for Students
Consider the following physical quantities: Energy, power, pressure, impulse, temperature, gravitational potential. Which of the above is/are the vector quantity/quantities?
(a) Impulse only
(b) Impulse and pressure only
(c) Impulse, temperature, and pressure
(d) Gravitational potential
Option a – Impulse only
A piece of stone tied to a string is made to revolve in a circular orbit of radius r with the other end of the string as the center. If the string breaks, the stone will:
(a) move away from the center
(b) move towards the center
(c) move along a tangent
(d) stop
Option c – move along a tangent
Which one of the following statements is not true?
(a) The gravitational force of Earth acting on a body of mass 1 kg is 9.8 newton
(b) The force acting on an object of mass 5 kg moving with a uniform velocity of 10 m/s on a frictionless surface is zero
(c) The SI unit of weight is kg
(d) The momentum of a man having a mass of 100 kg walking with a uniform velocity of 2 m/s is 200 newton-seconds
Option c – The SI unit of weight is kg
Which one of the following statements is correct?
(a) Acceleration due to gravity decreases with the increase in altitude
(b) Acceleration due to gravity increases with the increase of depth (assuming Earth to be a sphere of uniform density)
(c) Acceleration due to gravity decreases with the increase of latitude
(d) Acceleration due to gravity is independent of the mass of the Earth
Option a – Acceleration due to gravity decreases with the increase in altitude
A barometer kept in an elevator reads 760 mm when the elevator is at rest. When the elevator moves in an upward direction with increasing speed, the reading of the barometer will be:
(a) 760 mm
(b) < 760 mm
(c) > 760 mm
(d) Zero
Option b –
In wind power, which form of energy is converted into electrical energy?
(a) Kinetic energy
(b) Potential energy
(d) Radiant energy
Option a – Kinetic energy
The specific heat of a gas can have
(a) any positive value ranging from zero to infinity.
(b) always negative value.
(c) any positive value ranging from five to infinity.
(d) zero value.
Option a – any positive value ranging from zero to infinity
The thermal capacity of a body depends on the
(a) mass of the body only.
(b) mass and shape of the body only.
(c) density of the body.
(d) mass, shape, and temperature of the body.
Option d – mass, shape, and temperature of the body
Which one of the following statements regarding the expansion of materials due to heating is not correct?
(a) As the ice melts, it expands uniformly up to 4°C.
(b) Mercury thermometer works using the principle of expansion due to heating.
(c) A small gap is kept between two rails to allow for expansion due to heating.
(d) The length of a metallic wire increases when its temperature is increased.
Option a – As the ice melts, it expands uniformly up to 4°C
When water is heated from 0°C to 10°C, its volume
(a) increases
(b) decreases
(c) does not change
(d) first decreases and then increases
Option d – first decreases and then increases
Gases have
(a) only aerial expansion
(b) only volume expansion
(c) no definite shape
(d) Both (b) and (c)
Option d – Both (b) and (c)
Water is used in a hot water bag because
(a) it is easily available.
(b) it has high specific gravity.
(c) it has high specific heat.
(d) it is a liquid substance.
Option c – it has high specific heat
The majority of charge carriers in a p-type semiconductor are
(a) free electrons
(b) conduction electrons
(c) ions
(d) holes
Option d – holes
In an n-type semiconductor
(a) electrons are the only carriers.
(b) holes are the only carriers.
(c) electrons are the majority carriers, and holes are the minority carriers.
(d) None of the above
Option c – electrons are the majority carriers, and holes are the minority carriers
Which of the following is not a semiconductor?
(a) Silicon
(b) Krypton
(c) Selenium
(d) Germanium
Option b – Krypton
Which one of the following is not a semiconductor?
(a) Silicon
(b) Germanium
(c) Quartz
(d) Gallium arsenide
Option c – Quartz
Silicon is which type of material?
(a) Semiconductor
(b) Insulator
(c) Conductor
(d) No option is correct
Option a – Semiconductor
Which of the following is widely used in making semiconductor chips?
(a) Radium
(b) Sodium
(c) Germanium
(d) Sulphur
Option c – Germanium
When a piece of pure silicon is doped with aluminum, then
(a) the conductivity of the doped silicon piece will remain the same.
(b) the doped silicon piece will become n-type.
(c) the doped silicon piece will become p-type.
(d) the resistivity of the doped silicon piece will increase.
Option c – the doped silicon piece will become p-type
Avalanche breakdown is due to
(a) collision of minority charge carrier.
(b) increase in depletion layer thickness.
(c) decrease in depletion layer thickness.
(d) None of the above
Option b – increase in depletion layer thickness
The p-n junction diode is used as
(a) An amplifier
(b) A rectifier
(c) An oscillator
(d) A modulator
Option b – A rectifier
The full form of LED is
(a) Light Emitting Diode
(b) Light Emitting Device
(c) Light Enhancing Device
(d) Light Enhancing Diode
Option a – Light Emitting Diode
The reverse biasing in a p-n junction diode
(a) decreases the potential barrier.
(b) increases the potential barrier.
(c) increases the number of minority charge carriers.
(d) increases the number of majority charge carriers.
Option b – increases the potential barrier
In a p-n junction, avalanche current flows in the circuit when biasing is
(a) forward
(b) reverse
(c) zero
(d) excess
Option b – reverse
In thermocouples, current flow due to
(A) Protons
(B) Electrons
(C) +ve ions
(D) -ve ions
Option b – Electrons
If the temperature of the hot junction is increased by keeping the cold junction at the same temperature, thermoemf :
(A) Always increases
(B) Always decreases
(C) May increases or decrease
(D) Always remains constant
Option c – May increases or decrease
At inversion temperature, emf across thermocouple becomes :
(A) Maximum
(B) Minimum
(C) Zero
(D) Maximum and then decreases
Option c – Zero
Using a thermocouple :
(A) Electrical energy is converted into heat energy
(B) Heat energy is converted into electrical energy
(C) Chemical energy is converted into electric energy
(D) Electrical energy is converted into chemical energy
Option b – Heat energy is converted into electrical energy
Thermocouples cannot be used as
(A) Thermometer
(B) Voltmeter
(C) Refrigerator
(D) A. C. power generator
Option d – A. C. power generator
If the temperature of the cold junction is kept constant and the temperature of the hot junction is continuously increased then :
(A) Thermo emf increases continuously
(B) Thermo emf decreases continuously
(C) Thermo emf first increases and then decreases
(D) Change in emf depends upon the metal pair used in the thermocouple
Option c – Thermo emf first increases and then decreases
At neutral temperature, emf across thermo couple becomes :
(A) Maximum
(B) Minimum
(C) Zero
(D) Zero and then increases
Option a – Maximum
Neutral temperature is the temperature of the hot junction at which :
(A) Thermo emf is minimum
(B) Thermo emf is maximum
(C) Thermo emf changes its direction
(D) Seebeck effect is observed
Option b – Thermo emf is maximum
The neutral temperature of the thermocouple is dependent upon :
(A) the Metals used in the thermocouple
(B) the Temperature of the cold junction
(C) the Temperature of the hot junction
(D) the Inversion temperature
Option a – the Metals used in the thermocouple
The inversion temperature of the thermocouple depends upon
(A) Neutral temperature
(B) the Temperature of the cold junction and material used in the thermocouple
(C) Experimental arrangement
(D) the Temperature of the surrounding air
Option b – the Temperature of the cold junction and material used in the thermocouple
Which thermocouple form the following will produce maximum thermo emf if the junctions are kept at the same temperature difference? :
(A) Copper – bismuth
(B) Antimony – bismuth
(C) Iron-nickel
(D) Copper – iron
Option b – Antimony – bismuth
When the number of thermocouples is joined in series the net thermo emf :
(A) Is decreased
(B) Is increased
(C) Becomes zero
(D) Remains the same
Option b – Is increased
The ionization energy of a hydrogen atom is 13.6 eV. According to Bohr’s theory, the energy for a transition between the 3rd and 4th orbits is
a. 1.51 eV
b. 3.40 eV
c. 0.66 eV
d. 2.88 eV
Option c – 0.66 eV
What is the energy of light of wavelength 4500 Å?
a. 3 eV
b. 2.75 eV
c. 2.55 eV
d. 2.32 eV
Option b – 2.75 eV
The work function of a metal is 2.5 eV. If radiation of wavelength 4000 Å falls on it, what will be the energy of emitted photoelectrons?
a. 0.0063 eV
b. 0.0603 eV
c. 0.603 eV
d. 6.3 eV
Option c – 0.603 eV
The longest wavelength that will cause photoelectric emission from a sodium surface is 5830 Å. What is its work function?
a. 2.12 eV
b. 1.21 eV
c. 3.12 eV
d. 2 eV
Option a – 2.12 eV
The work function of a metal is 2.4 eV, and the stopping potential is 1.2 volts. What is the energy of incident photons?
a. 2.6 volts
b. 3.6 volts
c. 1-volt
d. 3 volts
Option b – 3.6 volts
1000 small water drops, each of radius r and charge q, coalesce to form one spherical drop. The potential of the big drop is larger than that of the smaller ones by a factor
a. 10
b. 100
c. 10,000
d. 1000
Option b – 100
A parallel plate capacitor is given a charge Q. If the separation between the plates is doubled, its capacity will be
a. halved
b. doubled
c. remains the same
d. None of the above
Option a – halved
A parallel plate capacitor is charged, and the charging battery is then disconnected. If the plates of the capacitor are moved further apart by means of insulating handles
a. The voltage across the plates increases
b. The stored capacitance decreases
c. The stored capacitance increases
d. remains constant
Option a – The voltage across the plates increases
The work required to bring the dipole from infinity to the point under consideration, in such a way that +q and -q are at all times on the same equipotential surface is known as
a. potential energy
b. kinetic energy
c. static energy
d. gravitational energy
Option a – potential energy
The theory of dielectric was begun by Faraday and subsequently developed by
a. Kelvin
b. Boltzmann
c. Maxwell theory
d. Gauss’s theory
Option c – Maxwell theory
The electric field that is responsible for polarizing a molecule of the dielectric may be polar or non-polar is called the
a. magnetic field
b. molecular field
c. potential field
d. gravitational field
Option b – molecular field
Which statement is not associated with nuclear fission?
(a) Neutron-induced nuclear reaction.
(b) Energy generation in stars.
(c) The source of energy in a nuclear reactor that produces electricity.
(d) Enormous energy is released in an atom bomb.
Option b – Energy generation in stars
The basic scientific principle behind a nuclear reactor is
(a) nuclear fusion.
(b) controlled nuclear fusion.
(c) uncontrolled nuclear fission.
(d) controlled nuclear fission.
Option d – controlled nuclear fission
Heavy water is used as a moderator in a nuclear reactor. The function of the moderator is
(a) to control the energy released in the reactor.
(b) to absorb neutrons and stop the chain reaction.
(c) to cool the reactor.
(d) to slow down the neutrons to thermal energy
Option d – to slow down the neutrons to thermal energy
Heavy water is manufactured in India at
(a) Trombay
(b) Assam
(c) Delhi
(d) Bhilai
Option a – Trombay
The mass-energy relation is the outcome of
(a) quantum theory.
(b) general theory of relativity.
(c) field theory of relativity.
(d) special theory of relativity.
Option d – special theory of relativity
The binding energy of the nucleus is a measure of its
(a) charge
(b) mass
(c) momentum
(d) stability
Option d – stability
A motor and engine are rotating about its axis with an angular velocity of 100 rad/min. It comes to rest in 15 s after beings switched off. Assuming constant retardation, calculate the number of revolutions made by it before coming to rest :
(A) 10.5 rev
(B) 5.5 rev
(C) 24.5 rev
(D) 12.5 rev
Option d – 12.5 rev
Starting from rest a fan rotates and takes 5 s to attain the maximum speed of 400 rpm. Assuming constant acceleration, find the time taken by the fan in attaining half the maximum speed :
(A) 2.5 s
(B) 1.5 s
(C) 4.5 s
(D) 5.2 s
Option a – 2.5 s
A wheel of radius 10 cm can rotate freely about its center. A string is wrapped over its rim and is pulled by a force of 5 N it is found that the torque produces an angular acceleration of 2 rad/s² in the wheel. Calculate the moment of inertia of the wheel :
(A) 1.25 kg m²
(B) 0.5 kg m²
(C) 0.25 kg m²
(D) 0.1 kg m²
Option c – 0.25 kg m²
Three particles of each of mass m are situated at the vertices of an equilateral triangle ABC of side L. Find the MI of the system about line AX perpendicular to AB in plane ABC :
(A) ML²/5
(B) 2 ML²/5
(C) 5 ML²/4
(D) 4 ML²/5
Option c – 5 ML²/4
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