Solved MCQs Notes for Preparation of NTS Tests

Solved MCQs Notes for Preparation of NTS Tests National Testing Service of Pakistan Preparation Notes Download PDF MCQs and Material for various posts National ...
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PPSC Lecturer Physics MCQs Sample Past Papers

PPSC Lecturer Physics MCQs Sample Past Papers

Q.1 When a helium atom loses an electron, it becomes:
A positive helium ion

Q.2 Beta ray emitted by a radioactive substance is:

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An electron which was existing inside the nucleus

Q.3 An electric charge in uniform motion produces:
Both magnetic and electric fields

Q.4 What is emitted by a hot metal filament in a cathode ray tube?

Electron

Q.5 If the mass of the bob of a pendulum is doubled its time period is:

Unchanged

Q.6 The centre of Newton rings is dark due to:
Destructive interference

Q.7 Which one is most stable element on the basis of binding energy?
Fe

Q.8 Resistance in RC circuit of time constant 2 seconds is 1000 Ohms. What is value of C in the circuit?
200 μ farad

Q.9 The Lenz’s law refers to induced __________

Currents

Q.10 In which of the following, output is similar to NAND gate if input A=0 and input B=1.
XOR

Q.11 For atomic hydrogen spectrum, which of the following series lies in visible region of electromagnetic spectrum?
Balmer series

Q.12 __________ are the particles that experience strong nuclear force.
Neutrons

Q.13 The vertical velocity of ball thrown upward __________ with time.
Doubles

Q.14 The force required to bend the normally straight path of a particle into a circular path is called __________ force.
Centripetal

Q.15 A disc at rest without slipping, rolls down a hill of height (3 x 9.8) m. What is its speed in m/sec when it reaches at the bottom?
11.4

Q.16 Tuning of the radio is the best example of electrical __________
Resonance

Q.17 A standing wave pattern is formed when the length of string is an integral multiple of __________ wavelength.
Half

Q.18 Which of the following lights travels the fastest in optical fibres?
Invisible infra-red

Q.19 The algebraic sum of potential changes in a closed circuit is zero is Kirchhoff’s __________ rule.
Second

Q.20 In LED when an electron combines with a __________ during forward bias conduction, a photon of visible light is emitted.
Hole

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