Physics Jamb Past Questions and Answers

Physics Jamb Past Questions and Answers

Question: Which of the following is a fundamental force in nature responsible for radioactive decay?

A) Gravitational force

B) Electromagnetic force

C) Strong nuclear force

D) Weak nuclear force

Answer: D) Weak nuclear force

Question: What is the relationship between the frequency and wavelength of a wave in a given medium?

A) c = f \lambdac=fλ

B) f = \frac{c}{\lambda}f= 

λ

c

​ 

 

C) \lambda = \frac{c}{f}λ= 

f

c

​ 

 

D) \lambda = cfλ=cf

Answer: B) f = \frac{c}{\lambda}f= 

λ

c

​ 

 

Question: In the context of optics, what is total internal reflection?

A) Reflection of light on the surface of a material

B) Reflection of light at the boundary between two different materials

C) Reflection of light inside a medium with a lower refractive index

D) Absorption of light by a medium

Answer: C) Reflection of light inside a medium with a lower refractive index

Question: According to the second law of thermodynamics, what is entropy?

A) The total energy of a system

B) The measure of disorder or randomness in a system

C) The heat transfer between two bodies

D) The internal energy of a system

Answer: B) The measure of disorder or randomness in a system

Question: What is the function of a diode in an electrical circuit?

A) To amplify signals

B) To store electrical energy

C) To control the direction of current flow

D) To measure resistance

Answer: C) To control the direction of current flow

Question: What is the relationship between the potential difference, current, and resistance in an electrical circuit?

A) V = IRV=IR

B) P = IVP=IV

C) I = \frac{V}{R}I= 

R

V

​ 

 

D) R = \frac{V}{I}R= 

I

V

​ 

 

Answer: A) V = IRV=IR

Question: According to Kepler's laws of planetary motion, what is the shape of a planet's orbit around the sun?

A) Circle

B) Ellipse

C) Parabola

D) Hyperbola

Answer: B) Ellipse

Question: What is the phenomenon of electromagnetic induction?

A) The generation of an electric current by a magnetic field

B) The creation of a magnetic field by an electric current

C) The reflection of light by a magnetic field

D) The absorption of electromagnetic waves by a conductor

Answer: A) The generation of an electric current by a magnetic field

Question: What is the primary factor affecting the resistance of a conductor in an electrical circuit?

A) Length of the conductor

B) Temperature of the conductor

C) Voltage applied

D) Cross-sectional area of the conductor

Answer: B) Temperature of the conductor

Question: What is the relationship between pressure, volume, and temperature in an ideal gas, as described by Boyle's law?

A) PV = \text{constant}PV=constant

B) P = \frac{V}{T}P= 

T

V

​ 

 

C) P = \frac{T}{V}P= 

V

T

​ 

 

D) P = VTP=VT

Answer: A) PV = \text{constant}PV=constant

Question: What is the purpose of a capacitor in an electrical circuit?

A) To resist the flow of electric current

B) To store and release electrical energy

C) To measure electric charge

D) To control the voltage in a circuit

Answer: B) To store and release electrical energy

Question: According to Hooke's Law, what is the relationship between the force applied to a spring and the resulting displacement?

A) F = kdF=kd

B) F = \frac{k}{d}F= 

d

k

​ 

 

C) F = k + dF=k+d

D) F = \frac{d}{k}F= 

k

d

​ 

 

Answer: A) F = kdF=kd

Question: What is the critical angle in optics?

A) The angle at which total internal reflection occurs

B) The angle of incidence equal to the angle of reflection

C) The angle of deviation in a prism

D) The angle at which diffraction is maximum

Answer: A) The angle at which total internal reflection occurs

Question: What is the principle of conservation of electric charge in a circuit?

A) Total electric charge in a closed system is constant

B) Electric charge is created in a circuit

C) Electric charge is destroyed in a circuit

D) Electric charge depends on resistance

Answer: A) Total electric charge in a closed system is constant

Question: According to the photoelectric effect, what happens when light of a certain frequency strikes a metal surface?

A) Emission of electrons

B) Absorption of light

C) Reflection of light

D) Refraction of light

Answer: A) Emission of electrons