Question

The diagram below shows a circuit containing a lamp L, a voltmeter and an ammeter. The voltmeter reading is 3 V and the ammeter reading is 0.5 A.; (i) What is the resistance of the lamp?; (ii) What is the power of the lamp?

Answer 1

Answer:

6 Ω

1.5W

Explanation:

The diagram below shows a circuit containing a lamp L, a voltmeter and an ammeter. The voltmeter reading is 3 V and the ammeter reading is 0.5 A.; (i) What is the resistance of the lamp?; (ii) What is the power of the lamp?

As we know that

Current = Voltage /Resistance

=> I  = V/R

I = 0.5  A

V = 3 V

=> 0.5 = 3/R

=> R = 6 Ω

resistance of the lamp = 6 Ω

power of the lamp = VI  = 3 *0.5 = 1.5W

or V²/R  = 3²/6  =  9/6 = 1.5W

or I²R  = (0.5)²*5  = 1.5W

power of the lamp = 1.5W

Answer 2

Answer:

answer is in the attachment

Explanation:

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