NMJ10403 SEM1 20242025 - Quiz 2

An ant is sitting on the string. What happens to the ant when a transverse wave on the string travels past it.

• It moves up and down.

• Nothing happens to it.

• It propagates to the right with the wave.

• It stays at rest.

• They travel in opposite directions

• They do not have any difference

• They have a phase difference

• The have different speeds

What happens when two waves that propagate in opposite directions combine?

• A standing wave is formed

• Destructive interference.

• Nothing happens

• A traveling wave is formed

When two waves that propagate along the SAME direction combine/interfere, the amplitude of the resultant wave is ALWAYS greater than the amplitude of the original waves.

• True

• False

What is the difference between the two waves?

• Phase difference.

• Frequency difference

• No difference.

• Speed difference.

The speed of flowing electrons in a conductor is comparable to the speed of light.

• TRUE

• FALSE

• 0.084Ω

• 0.042Ω

• 0.168Ω

• 0.336Ω

A heating element has a resistance of 𝑅 = 30Ω and operates at 𝑉 = 240V. Calculate the total energy generated by the heating element in 2 minutes.

• 1920J

• 230,400J

• 460,800J

• 3840J

A resistor is connected to a battery, and the voltage across the resistor is doubled. What happens to the power dissipated by the resistor?

• It quadruples

• It remains the same

• It doubles

• It reduces by half

When two resistors of unequal resistance are connected in series across a battery, which statement is true about the power dissipated in them?

• The resistor with higher resistance dissipates more power

• Both resistors dissipate the same power

• The resistor with lower resistance dissipates more power

• Power dissipation is independent of resistance