CBET Basic 3

Question 1

Which law states that the algebraic sum of all currents entering and leaving a node equals zero?

Accepted Answer

Kirchhoff's Current Law

Answer

Ohm's Law

Answer

Faraday's Law

Answer

Thevenin's Theorem

Question 2

What is the purpose of a Zener diode in a circuit?

Accepted Answer

Regulate voltage by allowing reverse breakdown at a fixed voltage

Answer

Amplify AC signals

Answer

Convert AC to DC

Answer

Store electrical charge

Question 3

In biomedical equipment, which frequency range is used by most diathermy units?

Accepted Answer

300 kHz – 5 MHz

Answer

0–100 Hz

Answer

1–10 kHz

Answer

500 MHz – 2 GHz

Question 4

Which mathematical relationship describes exponential decay in an RC circuit?

Accepted Answer

V(t) = V₀ × e^(-t/RC)

Answer

V(t) = V₀ × e^(t/RC)

Answer

V(t) = V₀ × (1 - e^(-t/RC))

Answer

V(t) = V₀ / (1 + RC)

Question 5

What is the function of an op-amp configured in a non-inverting amplifier topology?

Accepted Answer

Amplifies the input signal with positive gain and no phase inversion

Answer

Inverts and attenuates the input signal

Answer

Acts as an oscillator to generate waveforms

Answer

Provides impedance matching only, with unity gain

Question 6

What is the meaning of 'Type CF' applied part classification according to IEC 60601-1?

Accepted Answer

Floating applied part suitable for direct cardiac contact, defibrillation-proof

Answer

Defibrillation-proof applied part for chest use

Answer

Applied part not intended for direct cardiac contact with basic isolation

Answer

Applied part for external use only with no patient contact

Question 7

Which gas law states that pressure and volume are inversely proportional at constant temperature?

Accepted Answer

Boyle's Law

Answer

Charles's Law

Answer

Gay-Lussac's Law

Answer

Dalton's Law