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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.

1.

Primary batteries, unlike secondary batteries, may be:

Answer» Primary batteries (disposable batteries), which are designed to be used once and discarded when they are exhausted. Secondary batteries (rechargeable batteries), which are designed to be recharged and used multiple times.
Discussion
2.

What is the color code for a 220 5% resistor?

Answer» Resistor colour coding series: Black 0 Brown 1 Red 2 Orange 3 Yellow 4 Green 5 Blue 6 Violet 7 Gray 8 White 9 None 20% Silver 10% Gold 5% Therefore Red, Red, Brown, Gold 2 2 101 5% = 22 x 10 = 220 ohm 5% (tolerance). Video Explanation: https://youtu.be/8YHFQCqBGcA
Discussion
3.

The atomic number of an atom equals the number of electrons orbiting the nucleus.

Answer» In chemistry and physics, the atomic number (also known as the proton number) is the number of protons found in the nucleus of an atom and therefore identical to the charge number of the nucleus.
Discussion
4.

The unit of measurement for conductance is the coulomb.

Answer» The siemens (symbol: S) is the SI derived unit of electric conductance and electric admittance. Conductance and admittance are the reciprocals of resistance and impedance respectively, hence one siemens is equal to the reciprocal of one ohm, and is sometimes referred to as the mho.
Discussion