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1. Static charges are produced mainly by:

A Chemical reactions

B Friction

C Heating

D Radiation

2. Infrasound has frequency:

A Above 20 kHz

B Equal to 20 kHz

C Below 20 Hz

D Between 20 Hz and 20 kHz

3. Digital electronics deals with signals that are:

A Continuous

B Random

C Binary

D Analogue

4. Resistance increases with increase in:

A Area

B Length

C Temperature (for metals)

D Both B and C

5. Diffraction of waves is most noticeable when:

A Wavelength is very small

B Wavelength is comparable to obstacle size

C Amplitude is large

D Frequency is high

6. Which device is considered the brain of digital systems?

A Relay

B Logic gate

C Resistor

D Transformer

7. Which element is commonly used as fuel in nuclear reactors?

A Carbon

B Uranium-235

C Hydrogen

D Oxygen

8. Hypermetropia is corrected using:

A Concave lens

B Convex lens

C Plane mirror

D Prism

9. During evaporation, average kinetic energy of remaining liquid:

A Increases

B Decreases

C Remains same

D Becomes zero

10. Which graph represents Ohm’s law?

A Current vs Resistance

B Voltage vs Resistance

C Current vs Voltage

D Power vs Voltage

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