Combination of Resistors

Q.

Two lamps, one rated $100W$ at $220V$, and the other $60W$ at $220V$, are connected in parallel to the electric mains supply. What current is drawn from the line if the supply voltage is $220V$?

Q.

How do you reduce resistance in a circuit?

Q.

To increase the effective resistance in a circuit the resistors are connected in?

1. Series

2. Parallel

3. one at a time

4. combination of both

Q.

A battery of 12V is connected in series with resistors of 0.2 Ω, 0.3 Ω, 0.5 Ω and 5 Ω. How much current would flow through the 5-Ω resistor?

1. None of these

2. 1 A

3. 2 A

4. 0.5 A

Q.

Can a resistor be negative?

Q.

In series combination, total resistance:

1. decreases

2. increases

3. may increase or decrease according to the situation

4. no particular observation

Q.

The equivalent resistance of a circuit that has two equal resistances in parallel is 2 ohms. Find the value of each resistance.

1. 8Ω

2. 2Ω

3. 4Ω

4. 1Ω

Q.

Define one kilowatt-hour.

Q.

Two resistors of resistances 4Ω each are connected in parallel. Find the equivalent resistance of the circuit.

1. 8Ω

2. 2Ω

3. 1Ω

4. 4Ω

Q. How is a voltmeter connected in the circuit to measure the potential difference between two points?

Q. Figure shows a load resistor of 6 Ω through which current I is being driven by a combination of two batteries. Calculate the current ‘I’ marked in the diagram.

चित्र में 6 Ω का एक लोड प्रतिरोधक दर्शाया गया है जिसमें दो बैटरियों के संयोजन द्वारा धारा I प्रवाहित की जा रही है। चित्र में अंकित धारा ‘I’ की गणना कीजिए।

1. 1 A
2. $\frac{7}{6}\text{A}$
3. 0.5 A
4. 1.5 A

Q.

Given 'n' resistors of resistance R Ω. How should they be connected to get the minimum effective resistance:

1. Series

2. Either a or b

3. One by one

4. Parallel

Q.

The same current flows through all the resistances if they are connected in __.

Q. We have 2 ohm resistors. Sort the combinations in increasing order of their combined resistances.

1. 5 in series
2. 4 in parallel
3. 8 in parallel
4. 10 in parallel
5. 4 in series

Q.

A battery of 9 V is connected in series with resistors of $0.2\Omega ,0.3\Omega ,0.4\Omega ,0.5\Omega and12\Omega .$
How much current would flow through the $12\Omega$ resistor?

Q.

In ..................... combination of resistors, the total resistance is more than the highest resistance.

__

Q.

At what voltage is the alternating current supplied to our houses?

Q. In a parallel combination of resistors, the total resistance of the circuit is the individual resistances.

1. equal to
2. less than
3. greater than

Q. Two wires A and B, made of same material and having their lengths in the ratio 6 : 1 are connected in series. The potential differences across the wires are 3V and 2V respectively. If r${}_A$ and r${}_B$ the radii of A and B respectively, then $\frac{r_B}{r_A}$ is

1. 1:4
2. 1:1
3. 2:1
4. 1:2