Physics Sem 2 Final Review number 2

The current in a circuit with 50 Ω of resistance and 220 V is

• 11,000 A

• 270 A

• 0.3 A

• 4.4 A

Ultraviolet rays travel as

• Mechanical waves

• Longitudinal waves

• Transverse waves

• Sound waves

Wifi signals are emitted by

• Routers

• Modems

• Bluetooth devices

• Walkie talkies

When a pendulum "bob" is a the bottom of its arc when swinging the bob has maximum

• gravitational potential energy

• kinetic energy

• nuclear energy

• chemical energy

When light bulbs are added to a series circuit, the total resistance of the circuit will

• increase

• decrease

• remain constant

• too little information provided to make an informed decision

The frequency of a photon with a wavelength of 520 nm is

• 5.8 x 10¹⁴ Hz

• 3.2 x 10¹⁶ Hz

• 4.2 x 10¹³ Hz

• 9.4 x 10¹⁴ Hz

0 in binary code means

• On

• Off

• Self-destruct

• None of these

As height above the ground increases, ...

• gravitational potential energy increases

• gravitational potential energy decreases

• mechanical energy decreases

• nuclear energy increases

If the current in a circuit is constant and the voltage decreases, the electrical power will

• increase

• decrease

• remain unchanged

• dragonfruit

As temperature decreases, the speed of sound will

• increase

• decrease

• remain unchanged

• Coldplay