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Q: The frequency of green light is 6 × 10¹⁴ Hz. Its wavelength is (Entry test 2015)

A) 50 nm

B) 500 nm

C) 5000 nm

D) 100 nm

Q: Which of the following rays are not electromagnetic radiations? (Entry test 2015)

A) X-rays

B) UV rays

C) Cathode rays

D) Infrared rays

Q: If C and R denote the capacitance and resistance respectively, the dimensions of CR are (Entry test 2016)

A) M⁰L²T

B) M⁰L⁰T

C) M⁰L⁰T⁰

D) M⁰LT⁻¹

Q: The applied force which the solid can withstand without breaking is called (ET 2006)

A) stiffness of solid

B) strength of solid

C) Ductility of solid

D) Toughness of solid

Q: Which of the following is not ferromagnetic substance (ET 2016)

A) Iron

B) Cobalt

C) Nickel

D) Barium

Q: The shear modulus of elasticity G is (ET 2015)

A) A l / Fθ

B) F l / Aθ

C) F / Aθ

D) Aθ / F

Q: The word amorphous means without (ET 2015)

A) Shape

B) Structure

C) Size

D) Volume

Q: The ratio of volumetric strain to volumetric stress is called (ET 2011)

A) Compressibility

B) Young's Modulus

C) Bulk's Modulus

D) Shear's Modulus

Q: The substance which undergoes plastic deformation until it breaks is (ET 2011)

A) Ductile substance

B) Brittle substance

C) Plastic substances

D) All of these

Q: Which one of the following is not a polymer? (ET 2010)

A) Plastic

B) Petroleum

C) Starch

D) Natural rubber

Q: The substances which undergoes deformation with small force are called (ET 2010)

A) Elastic substance

B) Inelastic substances

C) Diamagnetic substance

D) Ductile substance

Q: The unit cell of the semiconductor crystals is (ET 2010)

A) Face centered cube

B) Simple cube

C) Body centered cube

D) Hexagonal

Q: The solids in which molecules or ions are arranged in a regular repetitive manner are called (ET 2009)

A) Amorphous solids

B) Glassy solids

C) Polymers

D) Crystals

Q: Conversion of alternating current into direct current is called (ET 2010)

A) Rectification

B) Amplification

C) Oscillation

D) Regeneration

Q: The current in semiconductor is caused by the movement of (ET 2009)

A) Protons

B) Electrons only

C) Holes only

D) Both electrons and holes

Q: The temperature coefficient of resistance of a semiconductor is (ET 2016)

A) Positive

B) Negative

C) Imaginary

D) Zero

Q: Intrinsic semiconductor can be converted into extrinsic semiconductor by adding (ET 2016)

A) Trivalent impurity

B) Pentavalent impurity

C) Pentavalent or trivalent impurities

D) None of the above

Q: In a transistor the emitter to base junction is (Entry Test 2010)

A) Reverse biased

B) Forward biased

C) Neutral

D) None

Q: The process by which the potential barrier of depletion region can be increased or decreased is called (Entry Test 2011)

A) Amplification

B) Biasing

C) Modulation

D) Doping

Q: In P-type substances, the minority charge carriers are (ET 2015)

A) Holes

B) Electrons

C) Protons

D) Positive ions