What should be the reading of the voltmeter V in the circuit given above? (All the resistances are equal to 1Q and the battery is of 1.5 volt)

examrobotsa's picture

Submitted by examrobotsa on

Q: 17 (NDA-II/2013)
What should be the reading of the voltmeter V in the circuit given above? (All the resistances are equal to 1Q and the battery is of
1.5 volt)

question_subject: 

Science

question_exam: 

NDA-II

stats: 

0,2,8,6,1,2,1

keywords: 

{'volt': [0, 0, 0, 1], 'circuit': [0, 0, 1, 3], 'resistances': [0, 0, 0, 3], '1q': [0, 0, 0, 1], 'battery': [0, 0, 1, 3], 'reading': [0, 0, 0, 1]}

In the given circuit, we have a series connection of three resistors. Each resistor has a resistance of 1Q. This means that the total resistance in the circuit is 3Q (1Q + 1Q + 1Q = 3Q).

According to Ohm`s law, V = IR, where V is the voltage, I is the current, and R is the resistance. In this case, the current flowing through the circuit can be calculated using Ohm`s law as well. Since the resistors are connected in series, the current flowing through all three resistors is the same.

Given that the battery has a voltage of 1.5 volts, and the total resistance is 3Q, we can calculate the current using Ohm`s law:

I = V / R

I = 1.5 volts / 3Q

I = 0.5 amperes

Now, to find the voltage across the voltmeter V, we can use the fact that the total voltage across the circuit is equal to the sum of the voltage across each component. Since the resistors and the voltmeter are in series, the voltage across the voltmeter is the same as the total voltage across the circuit.

Therefore,