Physics Concepts for SS 3 Students

What is the unit of electric field strength?

• Volts per meter (V/m)

• Newtons per coulomb (N/C)

• Amperes per meter (A/m)

• Joules per meter (J/m)

Define gravitational potential energy and its formula.

• The formula for gravitational potential energy is E = mc^2, where E is energy, m is mass, and c is the speed of light.

• Gravitational potential energy is defined as the energy of an object in motion, calculated as K = 1/2 mv^2.

• The formula for gravitational potential energy is U = mgh, where U is the gravitational potential energy, m is the mass of the object, g is the acceleration due to gravity, and h is the height above the reference point.

• The formula for gravitational potential energy is F = ma, where F is force, m is mass, and a is acceleration.

Explain the concept of the electromagnetic spectrum.

• The electromagnetic spectrum is a type of sound wave.

• The electromagnetic spectrum is the range of all types of electromagnetic radiation, categorized by wavelength and frequency.

• The electromagnetic spectrum only includes visible light.

• The electromagnetic spectrum is limited to radio waves and microwaves.

How does the extension of a spring relate to the force applied?

• The extension of a spring is unrelated to the force applied.

• The extension of a spring is inversely proportional to the force applied.

• The extension of a spring remains constant regardless of the force applied.

• The extension of a spring is directly proportional to the force applied.

Calculate the electric field strength at a distance of 2m from a charge of 5C.

• 8.99 x 10^9 N/C

• 1.5 x 10^11 N/C

• 2.5 x 10^8 N/C

• 1.12375 x 10^10 N/C

What is the formula for gravitational potential energy near the Earth's surface?

• U = mgh

• U = mgh^2

• U = mg^2h

• U = 2mgh

Describe the trajectory of a projectile launched at an angle.

• The trajectory is a straight line.

• The trajectory forms a circular path.

• The trajectory is a zigzag pattern.

• The trajectory of a projectile launched at an angle is a parabolic path.

List the different regions of the electromagnetic spectrum in order of increasing frequency.

• Magnetic Fields

• Static Electricity

• Radio Waves, Microwaves, Infrared, Visible Light, Ultraviolet, X-rays, Gamma Rays

• Sound Waves

What is the relationship between force and extension in a spring?

• Force decreases as extension increases in a spring.

• Force is unrelated to extension in a spring.

• Force is inversely proportional to extension in a spring.

• Force is directly proportional to extension in a spring (F = kx).

Determine the electric field strength between two parallel plates with a potential difference of 12V and a separation of 0.5m.

• 24 V/m

• 30 V/m

• 18 V/m

• 12 V/m