Everyday Science · Physics in Everyday Life · page 42 of 62
Electricity & Magnetism MCQs with Answers
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Practice these MCQs in the appElectricity & Magnetism MCQs (411–420)
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- 411.
What is a common use of a semi-conductor in electrical circuits?
- 412.
Material from which current passes through are called?
- 413.
Which of the following is the main characteristic of electromagnets that makes them useful in cranes and doorbells?
- 414.
Fuse is a small piece of metallic wire. Which property of fuse wire is most critical to its function in circuit protection?
- 415.
In a step-up transformer, if the secondary voltage is increased by a factor of 10, the current in the secondary coil will be _?
- 416.
The circuit that provides only one path for the current is called?
- 417.
In a reverse bias, the height of potential barrier is _?
- 418.
A is a semiconductor component that can either be used as a switch or an amplifier.
- 419.
Which material should be inserted between the plates of a capacitor in order to increase its capacitance?
- 420.
For a positively charged particle (q) moving with a velocity (v) in a magnetic field of flux density B, the force (F) acting on the charged particle is given by the expression?