Viva Voce: Resistors in Parallel | Lab Manuals for Class 10 PDF Download

Q.1.  What do you mean by the range of voltmeter?

The maximum and.minimum values of potential difference that can be measured through a voltmeter without any damage defines the range of voltmeter.

Q.2. Suppose in a combination, we find that the equivalent resistance is smaller than the smallest resistance used in the circuit. Which type of combination is present in the circuit?

It is a parallel combination.

Q.3. State some disadvantages of parallel circuit.

As one fuse controls all light, fans, and other electric appliances of a single room, circuit all of them will be put off when the fuse blow off.
It is difficult to install a new circuit for new installation of electrical appliances.

Q.4. Define range of an ammeter.

Range of an ammeter is defined as the maximum and minimum values of current that can be measured through an ammeter without any damage.

Q.5. What is the ratio in which current divides itself in the parallel combination?

The current divides itself in the inverse ratio of resistance in parallel combination (i.e. I ∝  1/R)

Q.6. State the law for the equivalent resistance, when resistors are in parallel combination.

Law states that the reciprocal of equivalent resistance is equal to the sum of the reciprocal of individual resistances.

Q.7. Two resistors are connected in series and then in parallel. What effect will it have on the readings of voltmeter and ammeter? 

As the applied voltage remains same, so there will be no change in the reading of voltmeter. Ammeter reading will be less in case of series and more in case of parallel.

Q.8. If two resistors having resistances of 3Ω and 6Ω respectively are connected in parallel, what will be the net resistance in the circuit? 

The net resistance or equivalent resistance of the circuit is given by

Q.9. What is the effect of temperature on the value of resistance of a conductor?

The resistance of conductor increases with increase in temperature.

Q.10. If two resistors of resistances R₁ and R₂ respectively are connected in parallel. How will you find the equivalent resistance?

If two resistors of resistances R₁ and R₂ respectively are connected in parallel, then equivalent resistance can be given as

Q.11.  Name the quantity which remains same in parallel combination of resistors.

In parallel combination of resistors, voltage (V) remains same.

Q.12.  Can you explain why voltmeter is connected in parallel across the conductor?

It is connected in parallel across the conductor to measure the maximum potential drop.

Q.13.  Name the type of connection used in house wiring.

In our house wiring, parallel connection of appliances is used.

Q.14.  In what way, household appliances should be connected? 

Household appliances must be connected in parallel.

Q.15. Two resistors having resistances of 4Ω and 6Ω respectively are connected in a circuit. It was found that the total resistance in the circuit is less than 4Ω. In what way the resistances would have been connected?

As we know that, for parallel combination, net resistance is less than that of individual resistance. So, they are connected in parallelwith each other.