Question

13. A LED TV power adaptor has a 2-mA output and resistance of 900 ohms. What
is the voltage output of the adaptor?
A. 2 volts
B. 4 volts
C. 6 volts
D. 8 volts
4. A motorcycle starter motor nood
1​

Answer 1

Answer:

2 volts is the answer

Explanation:

hope it helps you

Answer 2

Given:

The Current in LED TV = 2 mA

The resistance of LED TV = 900Ω

To Find:

The voltage output of the adaptor.

Solution:

• For finding the output voltage, we will apply Ohm's Law.

What is Ohm's Law?

According to Ohm's Law, 'the voltage in a conductor is directly proportional to the current flowing through it.'

Mathematically,

                                              V ∝ I

When the proportionality sign is removed, the proportionality constant is found to be Resistance. Thus,

                                              V = IR                 (1)

• Substituting known values in equation (1), we get:

                                 ⇒V = (2 mA)(900 Ω)

                                 ⇒V = 2 × $10^{-3}$ × 900

                                 ⇒V = 1.8 V

Thus, the output voltage is 1.8 V

The closest option is 2 volts.

Therefore, option A. 2 volts is correct.