All Free Physics MCQs with Answers
Every Physics question in the bank, across all chapters, each with the correct answer and a written explanation. Free and unlimited, with no account needed.
13,934 questions · page 653 of 697
- A. 2 N
- B. Zero
- C. 8 N
- D. 4 N
Explanation: Explanation:The force experienced by a charge moving in a magnetic field is given by the formula: F = qvBsinθWhere q is the charge, v is…
Correct answer: Zero- A. 1.6 x 10^-19C
- B. 2.7 x 10^-19C
- C. 3.2 x 10^-19C
- D. 4.8 x 10^-19C
Explanation: The equation for this scenario is; Magnetic Force= Bqv sin(X) where B is the magnetic field strength, q is the charge and v is the…
Correct answer: 3.2 x 10^-19C- A. Only Magnitude
- B. Only direction
- C. Magnitude and direction
- D. Neither magnitude nor direction
Explanation: Electric forces change the magnitude and direction of velocity, as they exert a force on charged particles based on the electric field…
Correct answer: Only direction- A. v1' ≈ −v1 ; v2' ≈ v1
- B. v1' ≈ v1 ; v2' ≈ 0
- C. v1' ≈ v1 ; v2' ≈ 2v1
- D. v1' ≈ −v1 ; v2' ≈ 0
Explanation: Explanation:V1' = (m1 - 0/m1 + 0) v1 + (2(m2) (0)/0 +m2) V1' = (m1 / m2) v1 + 0V1' = v1 + 0V1' = v1V2' = (2m1v1 / m1) + (0 - m1 / m1 + 0)…
Correct answer: v1' ≈ v1 ; v2' ≈ 2v1- A. An alpha particle
- B. Proton
- C. A positive helium ion
- D. A negative helium ion
Explanation: Helium's atomic number is 2 which means a neutral helium atom has 2 protons and 2 electrons , when helium loses an electron it has 1…
Correct answer: A positive helium ion- A. Sn
- B. Ba
- C. Kr
- D. Fe
Explanation: Binding energy is the energy required to bind the nucleons inside the nucleus. Binding energy is the measure of stability.
Correct answer: Fe- A. Electrons.
- B. Muons.
- C. Neutrinos.
- D. Neutrons.
Explanation: Strong nuclear force is experienced by particles in the nucleus, it is the attractive force that holds the nucleus together.
Correct answer: Neutrons.- A. One up quark and two down quarks.
- B. Up quarks and two down quarks.
- C. Two up quarks and one down quark.
- D. One up quark and one down quark.
Explanation: The sum of the relative masses of one up quark and two down quarks is equal to the mass of a neutron and the overall charge by adding the…
Correct answer: One up quark and two down quarks.- A. Radioactive
- B. Fission
- C. Ionization
- D. Fusion
Explanation: The correct answer is D) Fusion. Laser technology can be used in fusion reactions, such as in inertial confinement fusion, where lasers…
Correct answer: Fusion- A. 4.48 MeV
- B. 4.84 MeV
- C. 3 x 10^2 MeV
- D. 4.84 eV
Explanation: Mass defect multiplied by square of speed is equal to the energy (E). You are given themass defect and you know the speed of light so just…
Correct answer: 4.84 MeV- A. 1 x 10^-9 C
- B. 1 x 10^9 C
- C. 2 x 10^-9C
- D. 4 x 10^-9 C
Explanation: From coulomb's law we knowF=Kq1q2/r²Rearranging the equation, we get:q2=Fxr²/Kxq1 =2x9/9x10⁹x1 =2x10-⁹C Ans
Correct answer: 2 x 10^-9C- A. Glass
- B. Copper
- C. Cast iron
- D. High carbon steel
Explanation: Ductility is the property of being drawn into wires, it is a permanent strain tension test.Copper can be drawn into very thin wires as it…
Correct answer: Copper- A. Ductile material
- B. Tough material
- C. Brittle material
- D. Deformed material
Explanation: Ductility is the ability of a material to be drawn or plastically deformed without fracture.
Correct answer: Ductile material- A. 1.5mm
- B. 2mm
- C. 0.15mm
- D. 0.6mm
Explanation: Strain is nothing but ratio of change in length to original length i.e Δl/L.
Correct answer: 0.6mm- A. Stress
- B. Strain energy
- C. Strain
- D. Young modulus
Explanation: Strain energy is the energy stored by an object undergoing deformation.
Correct answer: Strain energy- A. Only the variables in the equation
- B. Only the constants in the equation
- C. The correctness of an equation
- D. Both constants and variables in the equation
Explanation: The principle of homogeneity of dimensions states that for an equation to be dimensionally correct, every term must have the same…
Correct answer: The correctness of an equation- A. A
- B. B
- C. C
- D. D
Explanation: The following is the solution:𝑃𝑟𝑒𝑠𝑠𝑢𝑟𝑒 = 𝐹𝑜𝑟𝑐𝑒/𝐴𝑟𝑒𝑎By dimensional analysis: 𝑃𝑟𝑒𝑠𝑠𝑢𝑟𝑒 = 𝑘𝑔. 𝑚.
Correct answer: D- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: T=2πgl The period of a simple pendulum is given by T = 2 gl, where l is the length of the pendulum and g is the acceleration due to…
Correct answer: Option C- A. 0.38m/s
- B. 126m/s
- C. 8.33m/s
- D. 58.33m/s
Explanation: We need to calculate the constant speed, the formula for it is given: speed= distance/time = 150/18 = 8.33m/s Hence the right answer is…
Correct answer: 8.33m/s- A. Perpendicular to the direction of field
- B. Opposite to the direction of force
- C. At a certain angle
- D. Along the direction of force
Explanation: Electric intensity, also known as electric field intensity, is the force experienced by a unit positive charge placed at a point in an…
Correct answer: Along the direction of force