Question

1. One way to prevent overloading your home circuit is to

a) operate fewer devices at the same time

b) change the wiring from parallel to series for troublesome devices

c) find a way to bypass the fuse or circuit breaker

d) wish very hard that overloading doesn't occur

Reason/Justification too please

2. Which of these wave features refers to the distance a pendulum swings to and fro?

a) frequency

b) period

c) wavelength

d) amplitude

reason/justification too please

3. In the United States, alternating electric current vibrates to and fro 60 times in one second. The frequency of these vibrations is

a) 60 Hz with a period of 1/60 second

b) 1/60 Hz with a period of 60 seconds

c) 60 Hz with a period of 60 seconds

d) 1/60 Hz with a period of 1/60 second

Reason/justification too please

4. The pitch of a sound is most closely related to its

a) frequency

b) distance away

c) wavelength

d) amplitude

Reason/justification too please

Answer 1

1. Overloading is caused when too many appliances are connected in a single socket , as it may causes undesirable current to pass through the wire.

Therefore , option A is correct.

2. Amplitude is the maximum displacement from mean position on either side .

Therefore , option D is correct.

3. If current is fluctuating 60 times per second , means 60 waves are produced per second . And we know that number of vibration / waves per second is called frequency.

There fore frequency is 60Hz and time period is 1/60 s as time =1/ frequency .

Option A is correct.

4. Pitch os related to frequency of wave , more the frequency higher the pitch and vice versa. Pitch measures the shrillness of sound wave .

Therefore option A is correct.