The following statements about a loudspeaker are correct except?
its contains a permanent magnet
sound signal converted to varying current signal enters the speech coil
the current in the speech coil creates a magnetic force on the coil
the magnetic force on the speech coil is uni-directional.
Correct answer is A
No explanation has been provided for this answer.
175.0 g
150.0 g
100.0 g
187.5 g
Correct answer is A
No explanation has been provided for this answer.
current and resistance only
current resistance and temperature
current and temperature only
resistance and temperature only
Correct answer is C
No explanation has been provided for this answer.
200m
40m
4m
400m
Correct answer is C
according to the work-energy theorem; Workdone = change in kinetic energy.
W = ∆ K.E
force x distance = \(K.E_2 - K.E_2\)
10 x s = 60 - 20
s = \(\frac{40}{10}\) = 4m.
10 rev/s
20 rev/s
24 rev/s
8 rev/s
Correct answer is C
No explanation has been provided for this answer.