Physics — Light, Sound, Electricity

Q1.The mirror used in headlights is:

A. Plane B. Convex C. Concave D. Cylindrical

Q2.The lens used to correct myopia is:

A. Convex B. Concave C. Bifocal D. Cylindrical

Q3.White light splits into colours through a prism. This is called:

A. Reflection B. Refraction C. Dispersion D. Diffraction

Q4.Sound cannot travel through:

A. Air B. Water C. Steel D. Vacuum

Q5.The unit of frequency is:

A. Decibel B. Hertz C. Watt D. Newton

Q6.Ohm's Law states:

A. F = ma B. V = IR C. E = mc² D. PV = nRT

Q7.Household wiring uses which circuit?

A. Series B. Parallel C. Mixed D. None

Q8.The power consumed by an appliance is measured in:

A. Volt B. Ampere C. Watt D. Ohm

Q9.Ultrasound has frequency above:

A. 20 Hz B. 200 Hz C. 2,000 Hz D. 20,000 Hz

Q10.A mirage is due to:

A. Reflection B. Total internal reflection C. Dispersion D. Diffraction

Q11.The fuse wire in an electrical circuit is made of:

A. Copper B. Silver C. Lead-tin alloy D. Gold

Q12.The colour of light with the longest wavelength is:

A. Violet B. Blue C. Green D. Red

Q13.An echo is produced by:

A. Refraction of sound B. Reflection of sound C. Absorption of sound D. Diffraction of sound

Q14.LED stands for:

A. Light Emitting Device B. Light Emitting Diode C. Laser Emitting Diode D. Low Energy Display

Q15.The device used to measure electric current is:

A. Voltmeter B. Ammeter C. Galvanometer D. Ohmmeter