A hydraulic lift operates based on –
(A) Bernoulli’s Principle
(B) Archimedes’ Principle
(C) Pascal’s Law
(D) Hooke’s Law
Answer: (C)

A real image is –
(A) Formed on screen
(B) Always erect
(C) Always virtual
(D) Cannot be projected
Answer: (A)

Refrigerants in a refrigerator are used to –
(A) Increase temperature
(B) Absorb heat
(C) Generate pressure
(D) Conduct current
Answer: (B)

Latent heat of vaporization is highest for –
(A) Alcohol
(B) Ether
(C) Water
(D) Mercury
Answer: (C)

A magnetic compass works based on –
(A) Electrostatics
(B) Gravitational pull
(C) Earth’s magnetic field
(D) Lenz’s law
Answer: (C)

SI unit of electric flux density is –
(A) C/m
(B) C/m²
(C) N·m²/C
(D) J/C
Answer: (B)

Inertia increases with –
(A) Velocity
(B) Volume
(C) Mass
(D) Density
Answer: (C)

A charged object attracts –
(A) Only oppositely charged bodies
(B) Only conductors
(C) Neutral and opposite charges
(D) Like charges
Answer: (C)

Coulomb’s Law is applicable to –
(A) Moving charges
(B) Static charges
(C) Magnetic poles
(D) Neutral bodies
Answer: (B)

A centrifuge separates particles using –
(A) Friction
(B) Magnetic force
(C) Centrifugal force
(D) Viscosity
Answer: (C)

Buoyant force acts on a body immersed in –
(A) Liquid only
(B) Gas only
(C) Any fluid
(D) Vacuum
Answer: (C)

A perfect conductor has –
(A) Infinite resistance
(B) Zero resistance
(C) High resistance
(D) Constant current
Answer: (B)

The refractive index of glass is about –
(A) 1.0
(B) 1.33
(C) 1.5
(D) 2.0
Answer: (C)

A charged particle moving in a magnetic field experiences a force –
(A) Along magnetic field
(B) Opposite to field
(C) Perpendicular to both velocity and field
(D) Zero
Answer: (C)

The SI unit of moment of inertia is –
(A) kg·m/s
(B) kg·m²
(C) N·m
(D) kg/m²
Answer: (B)

The photoelectric effect supports the –
(A) Wave theory of light
(B) Particle theory of light
(C) Doppler effect
(D) Kinetic theory
Answer: (B)

Newton’s Third Law deals with –
(A) Equal forces in same direction
(B) Unequal forces
(C) Action and reaction
(D) Rest and motion
Answer: (C)

The pressure in fluids increases with –
(A) Height
(B) Depth
(C) Area
(D) Temperature
Answer: (B)

Red shift in astronomy is evidence for –
(A) Contracting universe
(B) Expanding universe
(C) Constant velocity
(D) White holes
Answer: (B)

Ultrasound imaging uses frequencies –
(A) Below 20 Hz
(B) Between 20–20,000 Hz
(C) Above 20,000 Hz
(D) Exactly 20,000 Hz
Answer: (C)

The magnetic field inside a bar magnet runs from –
(A) North to South
(B) South to North
(C) East to West
(D) Equator to pole
Answer: (B)

SI unit of luminous flux is –
(A) Lux
(B) Candela
(C) Lumen
(D) Diopter
Answer: (C)

Nuclear fission is a –
(A) Chain reaction
(B) Spontaneous process
(C) Solar process
(D) Form of evaporation
Answer: (A)

Semiconductors are used in –
(A) Power lines
(B) Solar cells
(C) Vacuum tubes
(D) Gas stoves
Answer: (B)

The heating effect of current is expressed by –
(A) P = VI
(B) Q = I²Rt
(C) P = IR²
(D) V = IR
Answer: (B)

The resistance of a wire depends on –
(A) Length
(B) Area
(C) Material
(D) All of the above
Answer: (D)

Virtual images are formed by –
(A) Plane mirrors
(B) Concave mirrors (close objects)
(C) Convex lenses (near objects)
(D) All of the above
Answer: (D)

The brightness of a bulb depends on –
(A) Resistance
(B) Power
(C) Voltage
(D) All of the above
Answer: (D)

A body in equilibrium has –
(A) Zero net force
(B) Constant velocity
(C) Balanced torque
(D) All of the above
Answer: (D)

AC (alternating current) is preferred over DC for –
(A) Lower resistance
(B) Easier generation
(C) Easy transformation
(D) More efficiency
Answer: (C)

The unit of electric energy used in households is –
(A) Joule
(B) Watt
(C) kWh
(D) Ampere
Answer: (C)

Echoes occur due to –
(A) Refraction
(B) Reflection
(C) Interference
(D) Diffraction
Answer: (B)

Loudness of sound depends on –
(A) Frequency
(B) Amplitude
(C) Speed
(D) Wavelength
Answer: (B)

A body thrown vertically returns with –
(A) Less speed
(B) Equal speed
(C) No speed
(D) Varying mass
Answer: (B)

The unit of magnetic flux is –
(A) Tesla
(B) Henry
(C) Weber
(D) Ampere
Answer: (C)

Gamma rays are –
(A) Electrons
(B) Photons
(C) Neutrons
(D) Protons
Answer: (B)

The law of conservation of momentum is applicable only when –
(A) Friction is present
(B) External force is zero
(C) Speed is high
(D) Mass is constant
Answer: (B)

Torque is defined as –
(A) Force × displacement
(B) Force × radius
(C) Force / mass
(D) Force × area
Answer: (B)

The unit of radiation exposure is –
(A) Rad
(B) Gray
(C) Sievert
(D) All of the above
Answer: (D)

Ohmic conductors have –
(A) Constant resistance
(B) Increasing current
(C) Increasing voltage
(D) Zero resistance
Answer: (A)

A megawatt is equal to –
(A) 1000 watts
(B) 10⁶ watts
(C) 10³ joules
(D) 1 kilowatt
Answer: (B)

Negative acceleration is called –
(A) Acceleration
(B) Retardation
(C) Velocity
(D) Force
Answer: (B)

The speed of sound in vacuum is –
(A) Maximum
(B) Zero
(C) Constant
(D) Infinite
Answer: (B)

A dam stores –
(A) Chemical energy
(B) Mechanical energy
(C) Potential energy
(D) Kinetic energy
Answer: (C)

The lowest temperature theoretically possible is –
(A) 0°C
(B) –273°C
(C) –100°C
(D) 273°C
Answer: (B)

Thermal expansion is maximum in –
(A) Solids
(B) Liquids
(C) Gases
(D) Plasma
Answer: (C)

A voltmeter has high resistance because –
(A) To measure small current
(B) To prevent circuit load
(C) To allow max current
(D) None
Answer: (B)

The focal length of plane mirror is –
(A) 0
(B) 1
(C) Infinite
(D) 10
Answer: (C)

Specific gravity has –
(A) No unit
(B) Same as mass
(C) Unit of density
(D) Unit of weight
Answer: (A)

A thermopile converts –
(A) Heat to mechanical energy
(B) Heat to electrical energy
(C) Electric to thermal
(D) Thermal to kinetic
Answer: (B)