SS1 Third Term Physics Past Questions and Answers

Question: What is the SI unit of magnetic flux?

 

a) Weber (Wb)

b) Tesla (T)

c) Henry (H)

d) Gauss (G)

Answer: a) Weber (Wb)

 

Question: In a parallel circuit, what happens to the total resistance as more resistors are added?

 

a) Increases

b) Decreases

c) Remains the same

d) Cannot be determined

Answer: b) Decreases

 

Question: The phenomenon of a sudden and violent release of energy in the Earth’s crust is known as:

 

a) Earthquake

b) Tsunami

c) Volcano

d) Tornado

Answer: a) Earthquake

 

Question: What is the purpose of a step-up transformer?

 

a) Increases voltage

b) Decreases voltage

c) Increases current

d) Decreases current

Answer: a) Increases voltage

 

Question: What is the law of reflection for plane mirrors?

 

a) The angle of incidence is equal to the angle of refraction

b) The angle of reflection is equal to the angle of incidence

c) The angle of reflection is half the angle of incidence

d) The angle of incidence is always 90 degrees

Answer: b) The angle of reflection is equal to the angle of incidence

 

Question: Which of the following electromagnetic waves has the shortest wavelength?

 

a) Radio waves

b) Microwaves

c) X-rays

d) Gamma rays

Answer: d) Gamma rays

 

Question: What is the principle behind a thermos flask’s ability to keep liquids hot or cold?

 

a) Conduction

b) Convection

c) Radiation

d) Insulation

Answer: d) Insulation

 

Question: The SI unit of power in the International System of Units (SI) is:

 

a) Watt (W)

b) Joule (J)

c) Newton-meter (N·m)

d) Kilogram-meter per second (kg·m/s)

Answer: a) Watt (W)

 

Question: What is the phenomenon of light bending as it passes around the edge of an obstacle?

 

a) Refraction

b) Reflection

c) Diffraction

d) Dispersion

Answer: c) Diffraction

 

Question: According to Ohm’s law, what is the relationship between voltage, current, and resistance in a circuit?

 

a) Voltage = Current × Resistance

b) Current = Voltage × Resistance

c) Resistance = Voltage × Current

d) Voltage = Resistance × Current

Answer: a) Voltage = Current × Resistance

 

Question: The process of converting a substance directly from a gas to a solid without passing through the liquid phase is called:

 

a) Sublimation

b) Condensation

c) Deposition

d) Evaporation

Answer: c) Deposition

 

Question: Which law states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of the individual gases?

 

a) Boyle’s law

b) Dalton’s law

c) Charles’ law

d) Avogadro’s law

Answer: b) Dalton’s law

 

Question: What is the phenomenon of a change in frequency or wavelength in the observed light from a source moving relative to the observer?

 

a) Doppler effect

b) Photoelectric effect

c) Compton effect

d) Zeeman effect

Answer: a) Doppler effect

 

Question: Which device is used to measure electric current in a circuit?

 

a) Voltmeter

b) Ammeter

c) Ohmmeter

d) Galvanometer

Answer: b) Ammeter

 

Question: What is the principle behind the functioning of a refrigerator?

 

a) Boyle’s law

b) Archimedes’ principle

c) Carnot cycle

d) Pascal’s law

Answer: c) Carnot cycle

 

Question: What is the principle behind the operation of a simple microscope?

 

a) Hooke’s law

b) Archimedes’ principle

c) Pascal’s law

d) Boyle’s law

Answer: a) Hooke’s law

 

Question: What is the function of an oscilloscope?

 

a) Measures electric current

b) Displays waveforms of electronic signals

c) Measures resistance

d) Measures temperature

Answer: b) Displays waveforms of electronic signals

 

Question: The SI unit of magnetic field strength is:

 

a) Tesla (T)

b) Gauss (G)

c) Weber (Wb)

d) Henry (H)

Answer: a) Tesla (T)

 

Question: Which law states that the total electric flux through a closed surface is equal to the net charge enclosed by the surface divided by the permittivity of free space?

 

a) Gauss’s law for magnetism

b) Ampere’s law

c) Coulomb’s law

d) Gauss’s law for electricity

Answer: d) Gauss’s law for ele

ctricity

 

Question: What is the SI unit of capacitance?

 

a) Ohm (Ω)

b) Farad (F)

c) Henry (H)

d) Ampere (A)

Answer: b) Farad (F)