Semiconductor MCQ NEET 2025 PDF Download

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Semiconductor MCQ NEET. We covered all the Semiconductor MCQ NEET in this post for free so that you can practice well for the exam.

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MCQ on Semiconductor for NEET Students

In the presence of a strong external magnetic field, ferromagnetic materials become highly magnetized

(A) because of the domain structure present in them

(B) due to shifting of domain boundaries

(D) due to both shifting and rotation of domains

Option d – due to both shifting and rotation of domains

A square-shaped current-carrying loop with side length ‘a’ produces a magnetic field at its center that is

(A) directly proportional to a²

(B) directly proportional to a

(D) unaffected by a

Option c – inversely proportional to a

When the energy of incident light is increased by 40%, the kinetic energy of the photoelectrons rises from 0.4 eV to 0.86 eV. The metal’s work function is

(A) 0.75 eV

(B) 1.0 eV

(D) 1.5 eV

Option d – 0.75 eV

A charged particle moves clockwise at constant speed in a circular path. The magnetic field it produces at a point on the axis a certain distance from the center

(A) remains fixed in direction only

(B) remains fixed in magnitude only

(D) varies in both magnitude and direction

Option b – remains fixed in magnitude only

A 30 cm steel wire is bent into a shape like a stapler pin with the horizontal part three times longer than the vertical. If its magnetic pole strength is 0.2 Am after magnetization, then its magnetic moment is

(A) 0.024 Am²

(B) 0.2 Am²

(D) 0.36 Am²

Option c – 0.036 Am²

For a long straight pipe with a thin conducting wall carrying steady current along its length

(A) the magnetic field inside is zero everywhere

(B) the magnetic field is zero only at the center

(D) the magnetic field varies inside the pipe

Option a – the magnetic field inside is zero everywhere

If a galvanometer is connected with a shunt allowing only 10% of the total current through it, the ratio of voltage drop across the galvanometer to the voltage drop across the shunt is

(A) 1 : 9

(B) 1 : 10

(D) 9 : 1

Option c – 1 : 1

A short bar magnet is placed pointing north to south. If the neutral point is 12 cm away from the center and Earth’s horizontal magnetic field is 0.4 gauss, then the magnetic moment is

(A) 0.34 Am²

(B) 0.69 Am²

(D) 0.47 Am²

Option a – 0.34 Am²

Which of the following represents a unit for atomic magnetic dipole moment?

(A) Bohr magneton

(B) Gyromagnetic ratio

(D) Oersted

Option a – Bohr magneton

A charged particle travels at right angles through a magnetic field. After 4 seconds, its kinetic energy and momentum

(A) change

(B) remain the same

(D) kinetic energy remains same while momentum changes

Option b – remain the same

When plotting a graph between stopping potential and frequency

(A) the X-intercept is negative and gives the threshold frequency

(B) the Y-intercept is positive and gives minimum stopping potential

(D) the negative Y-intercept gives the value of work function divided by charge

Option d – the negative Y-intercept gives the value of work function divided by charge

Identify the particle(s) suitable for generating propagating electromagnetic or de Broglie waves:

(i) A stationary alpha particle
(ii) A moving neutron
(iii) A neutron under constant acceleration
(iv) An electron moving with steady speed

(A) (ii), (iii), and (iv) for de Broglie waves

(B) (iii), (iv) for EM waves and (ii) for de Broglie waves

(D) (ii), (iii), (iv) for de Broglie waves and (iii) for EM waves

Option a – (ii), (iii), and (iv) for de Broglie waves

Pick the incorrect option related to shunt usage

(A) Shunt safeguards the galvanometer from excessive current

(B) Shunt enables the galvanometer to function as an ammeter

(D) Shunt helps reduce the range of the ammeter

Option d – Shunt helps reduce the range of the ammeter

If magnetic field lines are present within a material, it means the substance is

(A) magnetized

(B) diamagnetic

(D) ferromagnetic

Option a – magnetized

Among a bar magnet, a magnetic compass, and a current loop:

(i) They all create uniform magnetic fields
(ii) Each acts as a magnetic dipole

(A) Only statement (i) is correct

(B) Only statement (ii) is correct

(D) Neither statement is correct

Option b – Only statement (ii) is correct

Assertion: Sensitivity of a moving coil galvanometer can be enhanced by introducing a suitable core material.

Reason: Using iron as a core increases current flow.

(A) Both are true and reason explains assertion

(B) Both are true but reason does not explain assertion

(D) Assertion is false, reason is true

Option c – Assertion is true, reason is false

In a cyclotron, as the velocity of a charged particle rises, the magnetic field

(A) is increased to keep the particle’s frequency constant

(B) is decreased to maintain constant frequency

(D) stays constant and doesn’t affect the particle’s frequency

Option a – is increased to keep the particle’s frequency constant

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