level 2

If sin (A + B) = 1 = cos (A – B) then

• A = B = 90°

• A = B = 0°

• A = B = 45°

• A = 2B

Which law states that the integral of the electric field over a closed surface is proportional to the charge enclosed?

• Coulomb’s law

• Gauss’s law

• Biot-Savart law

• Lenz’s law

What is the significance of the ‘depletion region’ in a PN junction diode?

• It allows free charge flow

• It acts as a barrier

• It increases conductivity

• It is an insulator

Why is sizeof(int*) usually larger than sizeof(int)?

• Pointers store addresses

• Integers require less memory

• Integers have fixed size

• Pointer size depends on OS

What is quicksilver commonly known as?

• Lead

• Mercury  

• Tin  

• Silver

Why does a BJT require a small input current while a MOSFET doesn’t?

• Because BJT is current-controlled

• Because MOSFET has higher resistance

• Because BJT has more charge carriers

• Because MOSFET works in depletion mode

A coin is flipped 3 times. What is the probability of getting exactly 2 heads?

• 1/8

• 3/8

• 1/2

• 3/4

Why do we prefer do-while over while loop in some cases

• It executes at least once

• It runs faster

• It reduces memory

• It prevents infinite loops

If the speed of an object doubles, its kinetic energy becomes

• Twice

• Four times

• Half

•   Unchanged

Why do we use negative feedback in amplifiers?

• To improve stability

• To increase gain

• To increase distortion

• To reduce power loss