A) pressure sensitive elements B) electrodes of thermionic valves C) bulb filaments D) automatic voltage regulators. Ans : (B)
A) Proton B) Electrons C) Atom D) Molecule Ans : (A)
A) Copper B) Cast iron C) Aluminium D) Lead. Ans : (D)
A) resonant waves B) musical waves C) ultrasonic waves D) microwaves. Ans : (C)
A) less than 1 B) between 1 to 10 C) more than 20 D) nearly 100. Ans : (B)
A) Absolute zero B) 240o C C) 250o C D) 1000o C. Ans : (B)
A) 1 B) 100 C) infinity D) zero. Ans : (A)
A) Barium titanate B) Potassium dihydrogen phosphate C) Rochelle salt D) All of the above. Ans : (D)
A) malleability B) ductility C) elasticity D) creep. Ans : (B)
A) frequency of applied voltage B) area of hysteresis loop for the material C) presence of magnetic materials in the vicinity D) intensity of electric field. Ans : (D)