CTS-I –exam questions based on Ohms law and power
law and the correct updated answers
1.How do you find V if you know W and Ohm ?: V = P * R
2.We have a 120 W amplifier for a 70V sound system, with 9 speakers,
each tapped at 7.5 Watts
What is the total power for all speakers: Amount speakers * Watt which is
9x7.5w
= 67.5
3.Calculate the voltage in a circuit where the resistance is 12 Ohms and
the power is 7 Watts: V = 7w * 12 ohm
4.What is the total impedance (rounded) of 10 loudspeakers ped at 7.5
tap each in a 70V, distributed system?: 65 Ohm W
5.An amplifier can supply 100w at 2 ohms. How many 8 ohm speakers can
be wired in parallel without exceeding the capabilities of amplifier?: 8 ohm /
2 ohm
=4
6.A circuit has a power source with a rating of 12 watts (W) and a
resistance of 4 ohms. Calculate the voltage (V) across this circuit.:
6.93volts
1/
1
law and the correct updated answers
1.How do you find V if you know W and Ohm ?: V = P * R
2.We have a 120 W amplifier for a 70V sound system, with 9 speakers,
each tapped at 7.5 Watts
What is the total power for all speakers: Amount speakers * Watt which is
9x7.5w
= 67.5
3.Calculate the voltage in a circuit where the resistance is 12 Ohms and
the power is 7 Watts: V = 7w * 12 ohm
4.What is the total impedance (rounded) of 10 loudspeakers ped at 7.5
tap each in a 70V, distributed system?: 65 Ohm W
5.An amplifier can supply 100w at 2 ohms. How many 8 ohm speakers can
be wired in parallel without exceeding the capabilities of amplifier?: 8 ohm /
2 ohm
=4
6.A circuit has a power source with a rating of 12 watts (W) and a
resistance of 4 ohms. Calculate the voltage (V) across this circuit.:
6.93volts
1/
1
