Resistors in Series and Parallel

Q. If two bulbs are connected in series, they will glow with less brightness compared to when connected one at a time.

1. False
2. True

Q.

Four resistors are connected in parallel. Each resistors has a resistance of $2\Omega$. The effective resistance of the combination is:

1. 0.5 Ω

2. 4 Ω

3. 0.25 Ω

4. 8 Ω

Q. Find the equivalent resistance in the following circuit.

1. $4\Omega$
2. $15\Omega$
3. $7.4\Omega$
4. $10.4\Omega$

Q.

What is an ammeter?

Q. Find the equivalent resistance between $A$ and $B$.

1. $10\Omega$
2. $5\Omega$
3. $40\Omega$
4. $30\Omega$

Q. In a series connection of resistors, the potential difference between the two extremes of the arrangement is equal to the sum of the potential differences across individual resistors.

1. False
2. True

Q.

Which of the following statements is not true, regarding the electrical set-up for verification of Ohm's law?

1. The voltmeter is connected in parallel with the known resistance.

2. The ammeter is connected in series in the circuit.

3. The rheostat can only increase the resistance in the circuit.

4. The key is used to switch on/off electric current in the circuit.

Q.

Two resistors of resistance 2R and 3R are connected in series with a battery, which has an emf of E and an internal resistance R. What is the potential difference across the resistor of resistance 2R?

1. 2E/5

2. E/3

3. E/2

4. 2E

Q.

If four resistors, each of the value $0.5ohm$ are connected in series, then the total resistance of the circuit is

Q.

For carrying out the experiment, on finding the equivalent resistance of two resistors connected in series, a student sets up the circuit as shown. On further verification, he finds out that the circuit has one or more of the following faults:

(i) The resistors R₁ and R₂ have not been correctly connected in series

(ii) The voltmeter has not been correctly connected in the circuit

(iii) The ammeter has not been correctly connected in the circuit

Out of these three, the actual fault in the circuit is/are:

1. Both (i) and (ii)

2. Only (i)

3. Both (ii) and (iii)

4. Only (ii)

Q. Question 11 (ii)
Show how you would connect three resistors, each of resistance 6 Ω, so that the combination has a resistance of
$\left(ii\right)4\Omega$?

Q.

In the circuit shown, the bulb marked 2R has twice the resistance of the bulb marked R. Compared with bulb 2R, the current in bulb R is ____ and its brightness compared to the other bulb, is ______.

1. larger, dimmer

2. smaller, dimmer

3. smaller, brighter

4. larger, brighter

Q.

Differentiate between series circuit and parallel circuit.

Q. In parallel connection of an electric circuit the is same but thevaries.

1. resistance
2. power
3. current
4. voltage

Q.

A bulb is connected to a cell. How is the resistance of circuit affected if another identical bulb is connected in series with the first bulb?

1. Resistance is four times

2. resistance is halved

3. Resistance is one-fourth

4. Resistance is doubled

Q.

Choose the correct statement about the given circuit:

Three identical bulbs are connected as shown in the figure.

1. Bulbs A and B are in parallel with bulb C

2. The potential (e.m.f) in the circuit is $60$V.

3. When switch S is turned on all bulbs glow with the same brightness.

4. Both (a) and (b)

Q.

Find the total resistance of the given circuit.

1. 8 Ω

2. 14 Ω

3. 2 Ω

4. 6 Ω

Q. Equivalent resistance between print x and y in the combination of resistance shown is

1. $20\Omega$
2. $18\Omega$
3. $32\Omega$
4. $40\Omega$

Q.

Use the following information to answer the next question.

A bulb glows less brightly when it is connected in series with a heater because th ethe bulb gets.

The information in which alternative completes the given statement?

1. 

2. 

3. 

4. 

Q.

State true or false.
For two resistances in combination, parallel connection gives larger effective resistance than the series connection.

1. True

2. False

Q. A uniform wire of resistance R and length L is cut into four equal parts, each of length L/4 which are then connected in parallel combination. The effective resistance of the combination will be

1. $R$
2. $4R$
3. $\frac{R}{4}$
4. $\frac{R}{16}$

Q. Find the effective resistance of the circuit given :

Q.

A voltmeter has a high ___________ .

Q. The equivalent resistance between A and B in the figure is:

1. $5\Omega$
2. $8\Omega$
3. $3\Omega$
4. $4\Omega$

Q. A combination consists of three resistors in series. Four similar sets are connected in parallel. if the resistance of each resistor is 2 ohm, the resistance of the combination is :

1. $2.5\Omega$
2. $3\Omega$
3. $1.5\Omega$
4. $5\Omega$

Q. A cell of emf 1V and internal resistance r = 1ohm is connected to an external resistance R = 4ohm. The ammeter A measures the current in the circuit and the voltmeter V measures the terminal voltage across the cell. What will be the readings of the ammeter and voltmeter when: (i) the key K is open, (ii) the key K is closed.

Q. In case of the circuit shown below, which of the following statements is/are true?

1. $R_1,R_2$ and $R_3$ are in series.
2. $R_2$ and $R_3$ are in series.
3. $R_2$ and $R_3$ are in parallel
4. The equivalent resistance of the circuit is $R_1+\frac{R_2{R}_3}{R_2+R_3}$

Q.

Three resistances each of 4 ohm are connected in the form of an equilateral triangle. The effective resistance between any two corners is:

1. Ohm

2. Ohm

3. 8 Ohm

4. 12 Ohm