The colored plastic covering on an electric wire makes it
- More attractive
- Resistant to corrosion
- Long lasting
- Safe to touch
The correct answer is (D) Safe to touch.
Which of the following is not an insulator?
Brass is a good conductor of heat and electricity.
So, Brass is not an insulator.
The correct answer is (A) - Brass
Which of the following type of energy can be converted easily into mechanical energy, sound energy, heat energy and light energy.
- Magnetic energy
- Potential energy
- Electrical energy
- Kinetic energy
Electrical energy is a type of energy that can be converted easily into mechanical energy, sound energy, heat energy and light energy.
The correct answer is (C) - Electrical energy
Which of the following is involved in the working of a torch bulb?
- Heating effect of current
- Magnetic effect of current
- Shocking effect of current
- Chemical effect of current.
The correct answer is (A) - Heating effect of current.
A torch which normally works on 4.5 volts of electricity is connected to domestic electricity supply of 220 volts. Which of the following will happen to this torch bulb?
- It will glow very brightly
- It will glow dimly
- It will not glow
- It will get fused.
The torch bulb which normally works at 4. 5V will get fused when connected to an electricity supply of 220V.
The correct answer is (D) - It will get fused