Electric Circuit

Q.

Which material is generally used in a fuse wire?

Q. Which of the following energy conversions take place in a torch?

1. $\text{Chemical}\to \text{Electrical}\to \text{Light}$
2. $\text{Electrical}\to \text{Chemical}\to \text{Light}$
3. $\text{Electrical}\to \text{Light}\to \text{Chemical}$
4. $\text{Light}\to \text{Chemical}\to \text{Electrical}$

Q.

Question 12
Zubeda made an electric circuit using a cell holder shown in Fig, a switch and a bulb. When she put the switch in the ‘ON’ position, the bulb did not glow. Help Zubeda in identifying the possible defects in the circuit.

Q. Fuse works on the principle of ___________ effects of electric current.

1. sound
2. visual
3. heating
4. magnetic

Q.

The electric bulb will glow only when the circuit ______.

1. Current flows through the circuit

2. Electric circuit is incomplete

3. Electric switch is open

4. All of these

Q.

If cells are joined in series, they have ________

Q. Match the electrical components with their corresponding symbols.

1. 
2. 
3. 
4. 
5. 
6. 

Q. What is a resistor?

Q. Which of the following represents correct connection of cells to form a battery?

1. 
2. 

Q. Which of the following appliances does not operate on an electric cell/battery?

1. Torch
2. TV remote
3. Walkie-talkie
4. Air conditioner

Q.

An ________________ is the path through which the electric current passes.

1. electric fabric

2. electric circuit

3. electric loop

4. electric insulator

Q. A student has to connect 4 cells of 1.5V each, in-order to form a battery of voltage 6V.
Which of the following highlights the correct arrangement of cells?

1. A
2. B
3. C
4. D

Q. 'X' is a safety device used in electrical circuits which prevents damage to electrical equipments. Identify 'X':

1. Electromagnet
2. Fuse
3. Electric cell
4. Tubelight

Q. Which of the following is/are effect(s) of electric current?​

1. Heating effect only​
2. Magnetic effect only​
3. Both heating and magnetic effect​
4. Repelling effect​

Q. Which among the following works on the principle of magnetic effect of electric current?

1. Electromagnet
2. Electric heater
3. Electric fuse
4. Electric press

Q. Which of the following is used to plate automobile parts to make them corrosion resistant?

1. Iron
2. Copper
3. Chromium
4. Gold

Q.

A break in the filament of an electric bulb means:

1. a break in the path of the current between the terminals of the cell

2. An incomplete electric circuit

3. the bulb is fused

4. All of these

Q.

Select the option that correctly represents the circuit given below:

1. 

2. 

3. 

4. (a) and (c) above.

Q. What does a 5 A rating on a fuse mean?

1. Fuse melts down if the current is less than 5 A.
2. Fuse melts if the current is more than 5 A.
3. Fuse produces energy if current is less than 5 A.
4. Fuse allows a current only equal to 5 A through it.

Q.

An electric circuit is a combination of ___ .

1. source, load, conducting wires and switch.

2. source and load.

3. source, load and conducting wires.

4. only source.

Q. All the bulbs and cells used in the circuits are identical. If the switches are turned ON, in which of the following options will the bulb(s) be the brightest?

1. 
2. 
3. 
4. 

Q.

Why is fuse wire used in electric circuits?

1. To increase the voltage.

2. For the protection of electrical appliances and circuit.

3. To prevent insulation.

4. To increase current flowing in the circuit.

Q. Why fuse wire has low melting point? Give reasons for melting of fuse wires.

Q.

what is dc in physics?

Q. Which of the following arrangements of the cells should be used to form a battery?

1. 
2. 
3. 
4. 

Q.

Why does the needle of a magnetic compass deflect when it is kept beside a current carrying wire?

1. Due to the magnetic effect of current

2. All of the above

3. Due to the heating effect of electric current

4. Due to the chemical effect of electric current

Q. 24 cells, each having the same e.m.f and 2 ohm internal resistance, are used to draw maximum current through an external resistance of 3 ohm. The cells should be connected: 1) In parallel 2) In series 3) In 4 row each having 6 cells 4) In 6 rows each having 4 cells

Q.

What are the materials used in fuse wires?

Q. Zubeda made an electric circuit using a cell holder, a switch, and a bulb as shown below. When she put the switch in the ON position, the bulb did not glow. Help Zubeda identify the possible defects in the circuit.

Q. Following devices are lighted for the same time under the same power supply.
1. Electric incandescent bulb
2. Compact fluorescent lamp
3. Fluorescent tube light
Which of the following devices produces maximum heat?

1. Electric incandescent bulb produces maximum heat.
2. Compact fluorescent lamp produces maximum heat.
3. Fluorescent tube light produces maximum heat.
4. All will produce the same amount of heat.