Physics Quiz

What number is represented by 2.3 × 10⁻³?

• 0.23

• 0.023

• 0.0023

• 0.00023

Which two values of a right-angled triangle are used to determine the sine of an angle?

• Opposite side and hypotenuse.

• Adjacent side and hypotenuse.

• Right angle and opposite side.

• Adjacent and opposite sides.

What is the SI unit of measurement for charge?

• Farad.

• Coulomb.

• Henry.

• Newton.

What would be the force acting on the ground below a mass of 10 kg due to gravity?

• 0.981 N

• 9.81 N

• 98.1 N

• 981 N

How many electrons does a copper atom have?

• 10

• 17

• 23

• 29

A series circuit has three 12 Ω resistors connected to a 200 V DC supply. What is the total circuit current?

• 50 A

• 32 A

• 16.6 A

• 5.56 A

What happens to the strength of the magnetic field around a conductor when another conductor, carrying equal current in the opposite direction, is placed next to it?

• Doubles in strength.

• Halves in strength.

• Remains the same strength.

• Cancels out to no strength.

What does the thumb indicate when using the right-hand 'grip rule'?

• A. North pole.

• B. South pole.

• C. Current flow.

• D. Voltage flow.

What are transformer cores made from to reduce eddy current loss?

• A. Copper bars.

• B. Plastic tubes.

• C. Laminated metal.

• D. Glass sheeting.

What electronic component allows current to flow in one direction only?

• A. Resistor.

• B. Diac.

• C. Capacitor.

• D. Diode.