Dimensional formula of force is –
(A) MLT⁻²
(B) ML²T⁻²
(C) MLT
(D) M⁻¹L⁻²T
Answer: (A)
The mirror formula is –
(A) 1/f = 1/u – 1/v
(B) f = u + v
(C) 1/f = 1/v + 1/u
(D) f = uv/(u+v)
Answer: (C)
The SI unit of electric power is –
(A) Ampere
(B) Watt
(C) Volt
(D) Ohm
Answer: (B)
Relative humidity is measured using –
(A) Barometer
(B) Hygrometer
(C) Manometer
(D) Lactometer
Answer: (B)
Which of the following has the highest thermal conductivity?
(A) Water
(B) Glass
(C) Silver
(D) Wood
Answer: (C)
The angle of incidence is equal to the angle of reflection in –
(A) Refraction
(B) Total internal reflection
(C) Reflection
(D) Dispersion
Answer: (C)
A screw gauge is used to measure –
(A) Pressure
(B) Volume
(C) Small thickness
(D) Force
Answer: (C)
A cyclotron is used to –
(A) Store charge
(B) Accelerate charged particles
(C) Measure radiation
(D) Produce sound waves
Answer: (B)
Escape velocity depends on –
(A) Mass of the body
(B) Speed of light
(C) Mass and radius of the planet
(D) Acceleration of the object
Answer: (C)
In free fall, acceleration is –
(A) 0
(B) Equal to gravity
(C) Increasing with time
(D) Decreasing
Answer: (B)
A moving electric charge produces –
(A) Only electric field
(B) Only magnetic field
(C) Both electric and magnetic fields
(D) No field
Answer: (C)
Centripetal force acts –
(A) Away from the center
(B) Towards the center
(C) Along the tangent
(D) Downward
Answer: (B)
The critical angle for total internal reflection depends on –
(A) Refractive index
(B) Frequency
(C) Wavelength
(D) Mirror curvature
Answer: (A)
A spring balance measures –
(A) Mass
(B) Weight
(C) Force
(D) Both B and C
Answer: (D)
Refrigeration is based on –
(A) Heating
(B) Radiation
(C) Evaporation
(D) Condensation
Answer: (C)
The power factor in an AC circuit is –
(A) Sine of angle
(B) Cosine of phase angle
(C) Product of current and voltage
(D) None of the above
Answer: (B)
The SI unit of angular momentum is –
(A) kg m²/s
(B) m/s²
(C) J/kg
(D) N·m
Answer: (A)
Which radiation has the highest penetration power?
(A) Alpha
(B) Beta
(C) Gamma
(D) UV
Answer: (C)
The measuring unit of magnetic flux is –
(A) Tesla
(B) Weber
(C) Henry
(D) Ohm
Answer: (B)
Which law relates pressure and volume at constant temperature?
(A) Charles’ Law
(B) Boyle’s Law
(C) Avogadro’s Law
(D) Hooke’s Law
Answer: (B)
A geyser works on –
(A) Bernoulli’s principle
(B) Convection
(C) Radiation
(D) Conduction
Answer: (B)
The refractive index of a medium is –
(A) Speed of light in medium / speed in vacuum
(B) Speed in vacuum / speed in medium
(C) Frequency ratio
(D) Wavelength ratio
Answer: (B)
Sound wave is a –
(A) Transverse wave
(B) Longitudinal wave
(C) Electromagnetic wave
(D) None of the above
Answer: (B)
Thermodynamics first law is related to –
(A) Entropy
(B) Conservation of energy
(C) Work done
(D) Internal pressure
Answer: (B)
The unit of capacitance is –
(A) Coulomb
(B) Farad
(C) Watt
(D) Volt
Answer: (B)
Bernoulli’s principle is used in –
(A) Electric circuits
(B) Blood flow in arteries
(C) Nuclear reactors
(D) Sound waves
Answer: (B)
The pitch of sound depends on –
(A) Amplitude
(B) Frequency
(C) Speed
(D) Loudness
Answer: (B)
The distance between two successive crests in a wave is –
(A) Period
(B) Frequency
(C) Amplitude
(D) Wavelength
Answer: (D)
Heat is a form of –
(A) Mass
(B) Energy
(C) Force
(D) Current
Answer: (B)
A body in uniform circular motion has –
(A) Constant speed but changing velocity
(B) Constant velocity
(C) Constant acceleration
(D) Zero net force
Answer: (A)
Coulomb’s law deals with –
(A) Magnetic fields
(B) Electric force between charges
(C) Capacitance
(D) Potential energy
Answer: (B)
A rainbow is formed due to –
(A) Reflection
(B) Refraction and dispersion
(C) Scattering
(D) Absorption
Answer: (B)
In vacuum, light travels –
(A) Faster than in air
(B) Slower than in air
(C) At same speed as in glass
(D) With infinite speed
Answer: (A)
The boiling point of water increases when –
(A) Pressure decreases
(B) Altitude increases
(C) Pressure increases
(D) Impurities are removed
Answer: (C)
Photoelectric effect shows the –
(A) Wave nature of light
(B) Dual nature of light
(C) Particle nature of sound
(D) Reflection of light
Answer: (B)
The image formed by a plane mirror is –
(A) Real and inverted
(B) Virtual and erect
(C) Real and erect
(D) Enlarged and real
Answer: (B)
The center of mass of a body is the point where –
(A) Total weight is concentrated
(B) All forces act
(C) Heat is maximum
(D) Rotation is maximum
Answer: (A)
The second’s pendulum has a time period of –
(A) 1 second
(B) 2 seconds
(C) 4 seconds
(D) 0.5 second
Answer: (B)
A periscope works on the principle of –
(A) Total internal reflection
(B) Refraction
(C) Multiple reflection
(D) Dispersion
Answer: (C)
The SI unit of power is –
(A) Watt
(B) Joule
(C) Newton
(D) Henry
Answer: (A)
The phenomenon of electromagnetic induction was discovered by –
(A) Faraday
(B) Newton
(C) Ampere
(D) Maxwell
Answer: (A)
The dimensional formula of work is –
(A) ML²T⁻²
(B) MLT
(C) MLT⁻²
(D) ML⁻²T²
Answer: (A)
The kinetic energy of a body is directly proportional to –
(A) Velocity
(B) Velocity²
(C) Mass²
(D) Acceleration
Answer: (B)
Archimedes’ principle deals with –
(A) Buoyant force
(B) Reflection
(C) Friction
(D) Inertia
Answer: (A)
The temperature at which Celsius and Fahrenheit scales are equal is –
(A) -32°
(B) 0°
(C) -273°
(D) -40°
Answer: (D)
The first man-made satellite was –
(A) Aryabhata
(B) Sputnik 1
(C) Apollo
(D) Explorer
Answer: (B)
Ultrasound waves have frequencies –
(A) Less than 20 Hz
(B) More than 20 kHz
(C) Between 20–20,000 Hz
(D) Infrasonic
Answer: (B)
Optical density is related to –
(A) Refractive index
(B) Mass
(C) Thermal conductivity
(D) Transparency
Answer: (A)
Watt-hour is a unit of –
(A) Voltage
(B) Energy
(C) Current
(D) Resistance
Answer: (B)
Red shift in astronomy is evidence of –
(A) Earth’s rotation
(B) Blue light dominance
(C) Expanding universe
(D) Gravitational pull
Answer: (C)