Circuit Diagram and Electrical Components

Q.

Which device would you use to open and close a circuit?

1. Paddle

2. Press

3. Switch

4. Nail

Q.

When no current is drawn from a cell, the potential difference between the terminals of the cell is called

1. voltage

2. electromotive force

3. potential

4. resistivity

Q.

Mark ‘T’ if the statement is true and ‘F’ if it is false:

To make a battery of two cells, the negative terminal of one cell is connected to the negative terminal of the other cell. (T/F)

1. True
2. False

Q.

Two bulbs A and B are connected through switches $S_1$ and $S_2$ as shown. Which of the following statement is true:

1. Bulb B glows but A does not glow.

2. Bulb A glows but B does not glow

3. Both bulbs glow

4. No bulb glow

Q.

Which of the following shows the correct depiction of a circuit diagram?

1. Only Q and R

2. Only P and R

3. All P, Q and R

4. Only P and Q

Q. Choose the correct statement.

1. A switch causes the change in direction of current.
2. A switch can increase or decrease the amount of current flowing in a circuit.
3. A switch produces electric current in a circuit.
4. A switch is used to make or break a circuit.

Q.

The device that breaks a circuit is:

1. Cell

2. Battery

3. Switch

4. Conductor

Q. In the shown circuit ammeter and voltmeter are ideal, then choose the correct option(s).

दर्शाए गए परिपथ में, अमीटर तथा वोल्टमीटर आदर्श हैं, तब सही विकल्प/विकल्पों का चयन कीजिए।

1. Reading of ammeter is 4 A
   
   अमीटर का पाठ्यांक 4 A है
   
2. Reading of ammeter is 2 A
   
   अमीटर का पाठ्यांक 2 A है
   
3. Reading of voltmeter is 20 V
   
   वोल्टमीटर का पाठ्यांक 20 V है
   
4. Reading of voltmeter is 10 V
   
   वोल्टमीटर का पाठ्यांक 10 V है
   

Q.

How do you add electric potential?

Q. Select the incorrect option.
i) to iv) show the symbols for electrical circuit elements.

1. iv) - Battery
2. ii) - Switch
3. i) - Voltmeter
4. iii) - Ammeter

Q.

When a cell is connected in a circuit containing various electrical components, a current flows in the electrical circuit because of

1. emf

2. the potential difference between terminals of the cell

3. the internal resistance of the cell

4. electrical resistance of circuit

Q.

Why copper, aluminium are used over tungsten, iron, nickel to make fuses.

1. They are cheap

2. They have low melting point

3. Fe, Ni are costly

4. Cu is a bad conductor

Q. Find the current flowing across three resistors $3\Omega ,5\Omega$ and $2\Omega$ connected in parallel to a $15$V supply. Also find the effective resistance and total current drawn from the supply.

Q. A wire of uniform cross section has a resistance $R$. It is cut into ten equal parts. The parts are connected in parallel between two points $A$ and $B$. The effective resistance between $A$ and $B$ will:

1. $0.1R$
2. $R$
3. $10R$
4. $0.01R$

Q.

In which of the following circuits will the bulb or the bulbs glow the brightest?

1. A simple circuit with one bulb and two cells

2. A simple circuit with two bulbs and two cells

3. A simple circuit with one bulb and one cell

4. A simple circuit with two bulbs and one cell

Q.

Electric current flows only when a circuit is closed.

1. True
2. False

Q.

Which of the following is the symbol of a rheostat?

1. 

2. 

   or

   

3. 

4. 

Q. Choose odd one out:

Q.

What is terminal voltage?Describe it , and how is it measured?

Q. You want to make an electric circuit in which electric current makes a bulb glow. Which of the following is not absolutely necessary in the circuit?

(a) connecting wires
(b) switch
(c) electric cell
(d) electric bulb

Q.

The simple line drawings used to represent the electric flow are known as______.

1. Circuit Diagrams

2. Blueprints

3. Cheese Cloths

4. Circus Peanuts

Q. Ammeter burns out when connected in parallel because:

1. It has high voltage
2. It has low resistance
3. It has low voltage
4. It has high resistance

Q. In an electrical circuit, ammeter is always connected in ____ with the load or the circuit.

1. parallel
2. parallel or series
3. series
4. neither parallel nor series

Q. Ammeter is always connected in ___ and Voltmeter is always connected in___.

1. series, series
2. parallel, series
3. parallel, parallel
4. series, parallel

Q. Select the incorrect option.
The options below show the symbols for electrical circuit elements.

1. i) - Voltmeter
2. ii) - Switch
3. iii) - Ammeter
4. iv) - Battery

Q.

The path connecting two points at different potentials, to make the electric charges flow, is called an electric ____________.

1. Circuit

2. Current

3. Potential Difference

4. Cell

Q.

The device which is used to measure electric current through a circuit is called a/an ____.

1. Ammeter

2. Voltmeter

3. Manometer

4. Wattmeter