The effective resistance of three resistors in parallel is –
(A) Sum of all resistances
(B) Always greater than the highest
(C) Always less than the smallest
(D) Equal to the largest
Answer: (C)

The Kelvin scale starts from –
(A) –273°C
(B) 0°C
(C) 273°C
(D) 100°C
Answer: (A)

A negative charge placed in an electric field moves –
(A) Along field lines
(B) Opposite to field lines
(C) Randomly
(D) Perpendicularly
Answer: (B)

Scalar quantities are those that have –
(A) Magnitude only
(B) Magnitude and direction
(C) Unit but no value
(D) Vector property
Answer: (A)

Sound waves in air are –
(A) Longitudinal
(B) Transverse
(C) Electromagnetic
(D) Ultrasonic
Answer: (A)

The direction of torque is given by –
(A) Right-hand rule
(B) Left-hand rule
(C) Lenz’s law
(D) Coulomb’s law
Answer: (A)

A solar water heater uses –
(A) Conduction
(B) Radiation
(C) Convection
(D) Geothermal energy
Answer: (B)

The strength of gravitational field near Earth’s surface is –
(A) 9.8 N/kg
(B) 98 N/kg
(C) 0.98 N/kg
(D) 980 N/kg
Answer: (A)

A wire with low resistivity is –
(A) Good conductor
(B) Good insulator
(C) Capacitor
(D) Transistor
Answer: (A)

Faraday’s law is related to –
(A) Electromagnetic induction
(B) Reflection
(C) Electrolysis
(D) Thermoelectricity
Answer: (A)

Electric current in a metal wire is due to flow of –
(A) Electrons
(B) Protons
(C) Neutrons
(D) Ions
Answer: (A)

A lens used to correct hypermetropia is –
(A) Convex
(B) Concave
(C) Cylindrical
(D) Plano-concave
Answer: (A)

The main source of solar energy is –
(A) Fission
(B) Fusion
(C) Combustion
(D) Radiation
Answer: (B)

The power of a lens (in diopters) is equal to –
(A) Focal length (in cm)
(B) 1/f (in m)
(C) f²
(D) 1/f²
Answer: (B)

The frequency of a wave is inversely proportional to –
(A) Wavelength
(B) Velocity
(C) Amplitude
(D) Intensity
Answer: (A)

Escape velocity is the minimum velocity needed to –
(A) Orbit Earth
(B) Remain in motion
(C) Escape Earth’s gravity
(D) Travel in space
Answer: (C)

A barometer measures –
(A) Wind speed
(B) Atmospheric pressure
(C) Temperature
(D) Humidity
Answer: (B)

The angle of incidence equals angle of reflection in –
(A) Plane mirror
(B) Prism
(C) Convex lens
(D) Convex mirror
Answer: (A)

Watt is equivalent to –
(A) J/s
(B) N·m
(C) J/m
(D) V·C
Answer: (A)

A periscope uses –
(A) Total internal reflection
(B) Magnetic deviation
(C) Plane mirrors
(D) Concave lenses
Answer: (C)

The sound speed in solids is –
(A) Less than in air
(B) More than in gases
(C) Zero
(D) Same as in water
Answer: (B)

The mirror used in shaving is –
(A) Convex
(B) Concave
(C) Plane
(D) Biconvex
Answer: (B)

A ball is thrown up — its kinetic energy becomes –
(A) Constant
(B) Zero
(C) Potential energy
(D) Work
Answer: (C)

Tesla coil is used to produce –
(A) Alternating current
(B) High voltage
(C) Sound energy
(D) Infrared waves
Answer: (B)

The dimensional formula of energy is –
(A) MLT⁻²
(B) ML²T⁻²
(C) MT²
(D) M²LT
Answer: (B)

SI unit of heat is –
(A) Joule
(B) Calorie
(C) Kelvin
(D) Watt
Answer: (A)

A wave does not transport –
(A) Mass
(B) Energy
(C) Momentum
(D) Vibration
Answer: (A)

The potential energy of a spring is –
(A) Maximum at equilibrium
(B) Zero always
(C) Maximum at maximum stretch
(D) Constant
Answer: (C)

Poisson’s ratio is –
(A) Unitless
(B) Pascal
(C) Degree
(D) m²/s
Answer: (A)

A non-polar substance is –
(A) Water
(B) Alcohol
(C) Oil
(D) Ammonia
Answer: (C)

Ballistic galvanometer is used to measure –
(A) Small current
(B) Charge
(C) Resistance
(D) Potential difference
Answer: (B)

Terminal velocity occurs when –
(A) Drag = weight
(B) Drag = zero
(C) Gravity = zero
(D) Force = infinite
Answer: (A)

A satellite in circular orbit has –
(A) Constant speed
(B) Constant acceleration
(C) Constant velocity
(D) No gravity
Answer: (A)

The dimension of power is –
(A) ML²T⁻³
(B) ML²T⁻²
(C) MT⁻²
(D) MLT⁻³
Answer: (A)

The radius of Earth is approx –
(A) 6400 m
(B) 6400 km
(C) 4000 km
(D) 10000 km
Answer: (B)

A concave lens always gives –
(A) Real and inverted image
(B) Virtual and erect image
(C) No image
(D) Enlarged image
Answer: (B)

Ohm’s law expresses relation between –
(A) V, I, R
(B) P, R, T
(C) Q, V, E
(D) F, m, a
Answer: (A)

Light year is a unit of –
(A) Time
(B) Distance
(C) Speed
(D) Intensity
Answer: (B)

Electric charge is conserved during –
(A) Nuclear decay
(B) All physical processes
(C) Combustion
(D) Motion
Answer: (B)

The SI unit of work is –
(A) Watt
(B) Joule
(C) Erg
(D) Horsepower
Answer: (B)

SI unit of capacitance is –
(A) Coulomb
(B) Ampere
(C) Farad
(D) Volt
Answer: (C)

The color of sky appears blue because –
(A) Reflection
(B) Refraction
(C) Dispersion
(D) Scattering
Answer: (D)

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

A pendulum bob at extreme position has –
(A) Maximum KE
(B) Zero PE
(C) Maximum PE
(D) Maximum speed
Answer: (C)

The energy in SHM is –
(A) Constant
(B) Varying
(C) Negative
(D) Random
Answer: (A)

Insulators do not allow –
(A) Light
(B) Electricity
(C) Sound
(D) Pressure
Answer: (B)

A white shirt reflects –
(A) All light
(B) No light
(C) Only red
(D) Only violet
Answer: (A)

SI unit of pressure is –
(A) Torr
(B) mmHg
(C) Pascal
(D) Bar
Answer: (C)

A ball in free fall has –
(A) Increasing acceleration
(B) Decreasing velocity
(C) Constant acceleration
(D) Zero speed
Answer: (C)

The velocity-time graph of uniform acceleration is –
(A) Straight line
(B) Curve
(C) Horizontal
(D) Irregular
Answer: (A)