Current Electricity MCQ for NEET. We covered all the Current Electricity MCQ for NEET in this post for free so that you can practice well for the exam.
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MCQ on Current Electricity for NEET Students
Assuming the human pupil to have a radius of 3 mm and a comfortable viewing distance of 25 cm, the minimum separation between two objects that the human eye can resolve at 550 nm wavelength is
(A) 3 μm
(B) 28 µm
(C) 100 μm
(D) 300 µm
Option b – 28 µm
In a polar region, the image of a ship is seen above the ship itself. This is due to ( Current Electricity MCQ for NEET )
(A) dispersion of light.
(B) lower layers of air are warmer than the upper layers.
(C) lower layers of air are cooler than the upper layers.
(D) temperature is higher than the critical temperature.
Option c – lower layers of air are cooler than the upper layers.
In a compound microscope, the focal lengths of two lenses are 1.6 cm and 4.25 cm. An object is placed 2.4 cm from the objective and the final image is formed 25 cm from the eye lens. The distance between the two lenses is
(A) 8.4 cm
(B) 7.75 cm
(C) 9.25 cm
(D) 11.00 cm
Option a – 8.4 cm
When the magnitude of magnification is >1 and the sign is negative it means ( Current Electricity MCQ for NEET )
(A) the object is at infinity, and the image is at a focus for a convex lens.
(B) the object is at infinity, the image at a focus for a concave lens.
(C) the object between the optical center and focus, image beyond f for a convex lens.
(D) the object between f and 2f, and the image beyond 2f for a convex lens.
Option d – the object between f and 2f, and the image beyond 2f for a convex lens.
For an incidence angle greater than critical angle transmission which ray gets reflected inside a Nicol prism?
(A) Ordinary ray
(B) Extraordinary ray
(C) Polarized ray
(D) Linearly polarized ray
Option a – Ordinary ray
For which region of electromagnetic spectrum diffraction is observed most readily? ( Current Electricity MCQ for NEET )
(A) X-rays
(B) Blue light
(C) Red light
(D) Radio waves
Option d – Radio waves
A ray incident on a glass prism deviates away from the base of the prism. Prism is placed in ……….
(A) air
(B) vacuum
(C) water
(D) carbon disulphide
Option d – carbon disulphide
Assertion: Ultraviolet rays are used to detect forged bank notes. Reason: Real bank notes fluoresce in UV light ( Current Electricity MCQ for NEET )
(A) The assertion is True, Reason is True; Reason is a correct explanation for Assertion.
(B) The assertion is True, and Reason is True; Reason is not a correct explanation for assertion.
(C) The assertion is True, Reason is False.
(D) The assertion is False, Reason is False.
Option c – The assertion is True, Reason is False.
An underwater swimmer cannot see very clearly even in crystal clear water due to ………
(A) absorption of light in water
(B) scattering of light in water
(C) reduction of speed of light in water
(D) change in the focal length of the eye lens.
Option d – change in the focal length of the eye lens.
A convex lens of focal length 10 cm is placed co-axially with a convex mirror of radius of curvature 20 cm. The two are kept 15 cm apart from each other. A point object is placed 15 cm in front of the convex lens. The image formed by the combination will be at a distance ( Current Electricity MCQ for NEET )
(A) 80 cm from the optic center of the lens.
(B) 45 cm from the optic center of the lens.
(C) 15 cm from the pole of the mirror.
(D) 45 cm from the pole of the mirror.
Option b – 45 cm from the optic center of the lens.
In frequency modulation ………. of carrier wave remain/s constant.
(A) frequency
(B) amplitude
(C) frequency and amplitude
(D) frequency and phase
Option b – amplitude
A ray enters a glass globe parallel to its axis. If the globe has a diameter of 20 cm and a refractive index of 1.5, at what distance from the center of the globe will the ray cross its axis? ( Current Electricity MCQ for NEET )
(A) 7.5 cm
(B) 15 cm
(C) 22.5 cm
(D) 30 cm
Option b – 15 cm
Two thin equiconvex lenses each of focal length 0.4 m are placed coaxially with their optic centers 0.4 m apart. Then the focal length of the combination is
(A) – 0.4 m
(B) 0.4 m
(C) – 0.1 m
(D) 0.1 m
Option b – 0.4 m
In a communication system, noise is most likely to affect the signal ………. ( Current Electricity MCQ for NEET )
(A) at the transmitter
(B) in the channel or in the transmission line
(C) in the information source
(D) at the receiver
Option b – in the channel or in the transmission line
One requires around 3.1 eV of energy to dissociate a hydrogen iodide molecule into hydrogen and iodine atoms. The minimum frequency of the appropriate electromagnetic radiation to achieve dissociation lies in
(A) the visible region.
(B) infrared region.
(C) ultraviolet region.
(D) microwave region.
Option a – the visible region.
Radio waves diffract around buildings although light waves do not. The reason is that radio waves ( Current Electricity MCQ for NEET )
(A) travel with a speed greater than c.
(B) have a much greater wavelength than light.
(C) are not transverse in nature.
(D) are not electromagnetic waves.
Option b – have a much greater wavelength than light.
Assertion: Critical angle for air at S.T.P. is not defined. Reason: Air at S.T.P. is optically the rarest medium.
(A) Assertion is True, Reason is True; Reason is a correct explanation for Assertion.
(B) Assertion is True, Reason is True; Reason is not a correct explanation for Assertion.
(C) Assertion is True, Reason is False.
(D) Assertion is False, Reason is False.
Option d – Assertion is False, Reason is False.
What is the height of the transmitting antenna if the T.V. telecast covers a radius of 320 km? ( Current Electricity MCQ for NEET )
(A) 1.25 km
(B) 11.25 km
(C) 8 km
(D) 3.125 km
Option c – 8 km
The receiver receives ……… version of the transmitted signal.
(A) exact
(B) inverted
(C) corrupted
(D) periodic
Option c – corrupted
Displacement current goes through the gap between the plates of the capacitor when ( Current Electricity MCQ for NEET )
(A) the capacitor is changing.
(B) the capacitor is discharging.
(C) (A) and the (B)
(D) the capacitor is fully charged.
Option c – (A) and the (B)
The fineness of the diffraction pattern is independent of ……..
(A) slit width
(B) number of slits
(C) length of slit
(D) none of the above
Option c – length of slit
Assertion: In obtaining a diffraction pattern from a change in the size of the hole causes a change pinhole, in the intensity of the diffraction pattern. Reason: The intensity of the diffraction pattern is inversely proportional to the size of the hole.
(A) The assertion is True, Reason is True; Reason is a correct explanation for Assertion.
(B) The assertion is True, and Reason is True; Reason is not a correct explanation for Assertion.
(C) The assertion is True, Reason is False.
(D) The assertion is False, Reason is True.
Option c – The assertion is True, Reason is False.
Which of the following waves disappear because of tilting?
(A) Space waves
(B) Microwaves
(C) Skywaves
(D) Surface waves
Option d – Surface waves
A thin prism P₁ with a prism angle of 2° and made from glass of refractive index 1.42 is combined with another thin prism P₂ made from glass of refractive index 1.56 to produce dispersion without deviation. What is the angle of the prism P₂?
(A) 1.5°
(B) 3°
(C) 4°
(D) 2.8°
Option a – 1.5°
Through a narrow slit of width 1 mm, a diffraction pattern is formed on a screen kept at a distance of 150 cm from the slit. The wavelength of the light used is 6400 Å and falls normally to the slit and screen. Then the distance between the two minima on either side of the central maximum is
(A) 1.92 mm
(B) 1.27 mm
(C) 2.532 mm
(D) 2.14 mm
Option a – 1.92 mm
UV radiation can be detected by ……… ( Current Electricity MCQ for NEET )
(A) photographic plates
(B) photoelectric cells
(C) fluorescence
(D) all of the above
Option d – all of the above
Optical fibers operate on the condition that the angle of incidence of light
(A) is greater than the critical angle for fiber material with respect to the core.
(B) is smaller than the critical angle for fiber material with respect to the core.
(C) is greater than the critical angle for fiber material with respect to cladding.
(D) is lesser than 90°.
Option c – is greater than the critical angle for fiber material with respect to cladding.
A 60 W bulb has an efficiency of 5%. The peak value of the electric field produced by its radiation at a distance of 4 m is
(A) 1.68 V/m
(B) 2.27 V/m
(C) 3.35 V/m
(D) 4.2 V/m
Option c – 3.35 V/m
An object is located 4 m from the first of two thin converging lenses of focal lengths 2 m and 1 m respectively. The lenses are separated by 4 m. The final image formed by the second lens is located from the source at a distance of
(A) 7.0 m
(B) 8.5 m
(C) 6.0 m
(D) 6.5 m
Option b – 8.5 m
The strength and quality of the transmitted signal are determined by ( Current Electricity MCQ for NEET )
(A) attenuator.
(B) modulation index.
(C) amplifier
(D) all of the above.
Option b – modulation index.
For what distance is ray optics a good approximation when the aperture is 2 mm and the wavelength of light is 600 nm?
(A) 2.4 m
(B) 4.92 m
(C) 6.67 m
(D) 7.30 m
Option c – 6.67 m
The angle of minimum deviation for a prism of refractive index 1.5 is equal to the angle of the prism of the given prism. Then the angle of prism is ……….. (sin 48°36′ = 0.75)
(A) 41°24′
(B) 48°36′
(C) 60°
(D) 82°48′
Option d – 82°48′
A 90 MHz carrier is modulated by a 300 Hz sine wave. The carrier voltage is 4 V and the frequency deviation is 30 kHz. Then, the modulation index is
(A) 25
(B) 50
(C) 100
(D) 500
Option c – 100
A magnetic field directed in the north direction acts on an electron moving in the east direction. The magnetic force on the electron will act
(a) vertically upwards.
(b) towards east.
(c) vertically downwards.
(d) towards north.
Option c – vertically downwards
The direction of the force on a current-carrying conductor in a magnetic field is given by
(a) Fleming’s left-hand rule.
(b) Fleming’s right-hand rule.
(c) Right-hand thumb rule.
(d) Left-hand thumb rule.
Option a – Fleming’s left-hand rule
The direction of the induced current is given by
(a) Fleming’s right-hand rule.
(b) Fleming’s left-hand rule.
(c) Right-hand thumb rule.
(d) Left-hand thumb rule.
Option a – Fleming’s right-hand rule
Switches are connected to
(a) live wire.
(b) neutral wire.
(c) earth wire.
(d) any one.
Option a – live wire
The most important safety method used for protecting home appliances from short-circuiting or Overloading is
(a) earthing
(b) the use of stabilizers
(c) the use of a fuse
(d) the use of an electric meter
Option c – the use of a fuse
Among the following statements : (i) A discharge lamp uses a discharge tube that is filled with gas at very low pressure. (ii) Always white light is emitted independent of gas taken in the lamp.
(a) Only (i) is true
(b) Only (ii) is true
(c) Both (i) and (ii) are true
(d) Both (i) and (ii) are false
Option a – Only (i) is true
Among identical spheres, A and B have charges as – 5 C and – 16 C
(a) – 5C is at a higher potential
(b) -16 C is at a higher potential
(c) both are at equal potential
(d) it cannot be said
Option a – – 5C is at a higher potential
The magnetic field is the strongest at the
(a) middle of the magnet.
(b) north pole.
(c) south pole.
(d) both poles.
Option d – both poles
The material of the core of a strong magnet is
(a) aluminum
(b) soft iron
(c) copper
(d) steel
Option b – soft iron
Magnetic lines of force inside the current-carrying solenoid are
(a) perpendicular to the axis.
(b) along the axis and are parallel to each other.
(c) parallel inside the solenoid and circular at the ends.
(d) circular.
Option c – parallel inside the solenoid and circular at the ends
A soft iron bar is introduced inside a current-carrying solenoid. The magnetic field inside the solenoid
(a) will become zero.
(b) will increase.
(c) will decrease.
(d) will remain unaffected.
Option b – will increase
An electric generator actually acts as
(a) a source of electric charge.
(b) a source of neat energy.
(c) an electromagnet.
(d) a converter of energy.
Option d – a converter of energy
The direction of conventional current is from
(a) Negative terminal to positive terminal
(b) Positive terminal to negative terminal
(c) In any direction
(d) In both the directions
Option b – Positive terminal to negative terminal
What should be the core of an electromagnet?
(a) soft iron
(b) hard iron
(c) rusted iron
(d) none of above
Option a – soft iron
Who has stated the Right-hand Thumb Rule?
(a) Orsted
(b) Fleming
(c) Einstein
(d) Maxwell
Option d – Maxwell
What is that instrument which can detect the presence of electric current in a circuit?
(a) galvanometer
(b) motor
(c) generator
(d) none of above
Option a – galvanometer
Which device produces the electric current?
(a) generator
(b) galvanometer
(c) ammeter
(d) motor
Option a – generator
The best material to make permanent magnets is
(a) aluminum
(b) soft iron
(c) copper
(d) alnico
Option d – alnico
The magnetic field lines always begin from
(a) the N-pole and end on S-pole.
(b) S-pole and end on N-pole.
(c) start from the middle and end at N-pole.
(d) start from the middle and end at S-pole.
Option a – the N-pole and end on S-pole
If the current values periodically from zero to a maximum value, back to zero, and then reverses its direction, the current is
(a) direct
(b) alternative
(c) pulsating
(d) none of the above
Option b – alternative
Earth wire carries
(a) current
(b) voltage
(c) no current
(d) heat
Option c – no current
The main advantage of A.C power transmission over D.C power transmission over long distances is
(a) AC transmits without much loss of energy
(b) less insulation problem
(c) less problem of instability
(d) easy transformation.
Option a – AC transmits without much loss of energy
Which among these are the main characteristics of fuse elements?
(a) High conductivity
(b) Low melting point
(c) Do not bum due to oxidation
(d) All of the above
Option d – All of the above
Overloading is due to
(a) Insulation of wire damaged
(b) a Fault in the appliances
(c) Accidental hike in supply voltage
(d) All of the above
Option d – All of the above
The most important safety method used for protecting home appliances from short-circuiting or overloading is
(a) earthing
(b) use of fuse
(c) use of stabilizers
(d) use of an electric meter
Option b – use of fuse
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