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College Entrance	Jamia Millia Islamia Aligarh Muslim University Banaras Hindu University

2020

Q1
A biconcave lens of power P vertically splits into two identical plano-concave parts.The power of each part will be:
(a)2P
(b)P/2
(c)P
(d)P/√2

Solution

Q2
The power factor of a series LCR circuit at resonance will be
(a)1
(b)zero
(c)1/2
(d)1/√2

Solution

Q3
If photons of frequency 𝛎 are incident on the surfaces of metals A and B of threshold frequencies 𝛎/2 and 𝛎/3 respectively the ratio of the maximum kinetic energy of electrons emitted from A to that from B:
(a)2:3
(b)3:4
(c)1:3
(d)√3:√2

Solution

Q4
The electric flux through a closed Gaussian surface depends upon
(a)net charge enclosed and permittivity of the medium
(b)net charge enclosed,permittivity of the medium and the size of the Gaussian surface
(c)net charge enclosed only
(d)permittivity of the medium only

Solution

Q5
A charge particle after being accelerated through a potential difference V enters a uniform magnetic field and moves in a circle of radius r. If V is doubled the radius of the circle will become:
(a)2r
(b)√2r
(c)4r
(d)r/√2

Solution

Q6
The wavelength and intensity of light emitted by a LED depend upon:
(a)forward bias and energy gap of the semiconductor
(b)energy gap of the semiconductor and reverse bias
(c)energy gap only
(d)forward bias only

Solution

Q7
The graph showing the correct variation of linear momentum(p) of a chrge particle with its de-Broglie wavelength (λ):

Solution

Q8
The selectivity of a series LCR AC circuit is large when
(a)L is large and R is large
(b)L is small and R is small
(c)L is large and R is small
(d)L=R

Solution

Q9
Photodiodes are used to detect :
(a)Radiowaves
(b)Gamma rays
(c)Infrared rays
(d)Optical signals

Solution

Q10
The relationship between Brewster angle θ and the speed of light v in the denser medium is:
(a)v tan θ=c
(b)c tan θ=v
(c)v sin θ=c
(d)c sin θ=v

Solution

Subjects

2020

Q1 A biconcave lens of power P vertically splits into two identical plano-concave parts.The power of each part will be: (a)2P (b)P/2 (c)P (d)P/√2

Solution

Q2 The power factor of a series LCR circuit at resonance will be (a)1 (b)zero (c)1/2 (d)1/√2

Solution

Q3 If photons of frequency 𝛎 are incident on the surfaces of metals A and B of threshold frequencies 𝛎/2 and 𝛎/3 respectively the ratio of the maximum kinetic energy of electrons emitted from A to that from B: (a)2:3 (b)3:4 (c)1:3 (d)√3:√2

Solution

Q4 The electric flux through a closed Gaussian surface depends upon (a)net charge enclosed and permittivity of the medium (b)net charge enclosed,permittivity of the medium and the size of the Gaussian surface (c)net charge enclosed only (d)permittivity of the medium only

Solution

Q5 A charge particle after being accelerated through a potential difference V enters a uniform magnetic field and moves in a circle of radius r. If V is doubled the radius of the circle will become: (a)2r (b)√2r (c)4r (d)r/√2

Solution

Q6 The wavelength and intensity of light emitted by a LED depend upon: (a)forward bias and energy gap of the semiconductor (b)energy gap of the semiconductor and reverse bias (c)energy gap only (d)forward bias only

Solution

Q7 The graph showing the correct variation of linear momentum(p) of a chrge particle with its de-Broglie wavelength (λ):

Solution

Q8 The selectivity of a series LCR AC circuit is large when (a)L is large and R is large (b)L is small and R is small (c)L is large and R is small (d)L=R

Solution

Q9 Photodiodes are used to detect : (a)Radiowaves (b)Gamma rays (c)Infrared rays (d)Optical signals

Solution

Q10 The relationship between Brewster angle θ and the speed of light v in the denser medium is: (a)v tan θ=c (b)c tan θ=v (c)v sin θ=c (d)c sin θ=v

Solution

Subjects

Q1
A biconcave lens of power P vertically splits into two identical plano-concave parts.The power of each part will be:
(a)2P
(b)P/2
(c)P
(d)P/√2

Q2
The power factor of a series LCR circuit at resonance will be
(a)1
(b)zero
(c)1/2
(d)1/√2

Q3
If photons of frequency 𝛎 are incident on the surfaces of metals A and B of threshold frequencies 𝛎/2 and 𝛎/3 respectively the ratio of the maximum kinetic energy of electrons emitted from A to that from B:
(a)2:3
(b)3:4
(c)1:3
(d)√3:√2

Q4
The electric flux through a closed Gaussian surface depends upon
(a)net charge enclosed and permittivity of the medium
(b)net charge enclosed,permittivity of the medium and the size of the Gaussian surface
(c)net charge enclosed only
(d)permittivity of the medium only

Q5
A charge particle after being accelerated through a potential difference V enters a uniform magnetic field and moves in a circle of radius r. If V is doubled the radius of the circle will become:
(a)2r
(b)√2r
(c)4r
(d)r/√2

Q6
The wavelength and intensity of light emitted by a LED depend upon:
(a)forward bias and energy gap of the semiconductor
(b)energy gap of the semiconductor and reverse bias
(c)energy gap only
(d)forward bias only

Q7
The graph showing the correct variation of linear momentum(p) of a chrge particle with its de-Broglie wavelength (λ):

Q8
The selectivity of a series LCR AC circuit is large when
(a)L is large and R is large
(b)L is small and R is small
(c)L is large and R is small
(d)L=R

Q9
Photodiodes are used to detect :
(a)Radiowaves
(b)Gamma rays
(c)Infrared rays
(d)Optical signals

Q10
The relationship between Brewster angle θ and the speed of light v in the denser medium is:
(a)v tan θ=c
(b)c tan θ=v
(c)v sin θ=c
(d)c sin θ=v